bm-20251023-vultr-x86_64-Fidget%2dSpinner-tracing_jit-3.15.0a1+-eb73378-pystats-vs-base.md

Execution counts

Execution counts for Tier 1 instructions.

The "miss ratio" column shows the percentage of times the instruction executed that it deoptimized. When this happens, the base unspecialized instruction is not counted.

Name	Base Count	Head Count	Change
ENTER_EXECUTOR	743,835,475	1,598,262,611	114.9%
CALL_KW_BOUND_METHOD	1,684,562	140,421	-91.7%
JUMP_BACKWARD_JIT	1,375,133,736	126,071,935	-90.8%
STORE_GLOBAL	6,156,329	794,769	-87.1%
STORE_FAST_LOAD_FAST	62,088,880	8,062,985	-87.0%
FOR_ITER_GEN	345,643,030	46,719,186	-86.5%
UNARY_NOT	56,950,334	8,528,689	-85.0%
UNPACK_SEQUENCE_TUPLE	166,050,468	24,901,852	-85.0%
FOR_ITER_RANGE	249,679,501	43,112,075	-82.7%
CALL_BOUND_METHOD_GENERAL	7,195,406	1,366,477	-81.0%
UNARY_INVERT	9,835,718	1,870,863	-81.0%
DELETE_SUBSCR	131,380,678	26,078,973	-80.2%
BINARY_OP_ADD_FLOAT	205,200,984	49,743,177	-75.8%
STORE_SUBSCR_LIST_INT	97,599,025	24,997,397	-74.4%
FOR_ITER_LIST	783,900,012	221,879,697	-71.7%
BINARY_OP_EXTEND	241,728,999	71,365,972	-70.5%
LOAD_COMMON_CONSTANT	28,457,520	8,753,939	-69.2%
UNARY_NEGATIVE	139,585,140	43,446,273	-68.9%
FOR_ITER	310,183,357	99,060,095	-68.1%
UNPACK_SEQUENCE_LIST	2,075,188	680,158	-67.2%
LOAD_ATTR_METHOD_LAZY_DICT	49,565,203	16,272,126	-67.2%
CALL_BUILTIN_O	320,353,821	105,689,496	-67.0%
MAP_ADD	26,549,503	8,933,074	-66.4%
CONTAINS_OP_SET	274,336,366	94,299,090	-65.6%
UNPACK_SEQUENCE_TWO_TUPLE	542,129,112	192,288,685	-64.5%
UNPACK_SEQUENCE	1,214,813	463,757	-61.8%
BINARY_OP_SUBSCR_LIST_INT	572,172,153	219,353,061	-61.7%
BINARY_OP_SUBSCR_STR_INT	279,400,372	107,381,744	-61.6%
CONTAINS_OP	158,452,444	61,901,768	-60.9%
MAKE_CELL	64,813,565	25,438,599	-60.8%
CONTAINS_OP_DICT	171,642,397	69,544,409	-59.5%
BINARY_OP_SUBSCR_GETITEM	165,455,820	68,412,087	-58.7%
BINARY_OP	1,351,083,127	582,071,873	-56.9%
STORE_ATTR_INSTANCE_VALUE	1,076,668,454	470,113,472	-56.3%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	194,807,939	88,222,648	-54.7%
COPY	813,045,624	372,060,639	-54.2%
BUILD_SLICE	55,173,575	25,607,715	-53.6%
EXTENDED_ARG	314,729,422	149,620,124	-52.5%
LOAD_ATTR_INSTANCE_VALUE	4,879,198,216	2,326,856,380	-52.3%
POP_JUMP_IF_NONE	319,160,890	153,831,758	-51.8%
STORE_FAST	6,445,645,037	3,136,852,100	-51.3%
STORE_FAST_STORE_FAST	474,334,890	233,298,794	-50.8%
JUMP_FORWARD	343,606,451	169,080,408	-50.8%
BINARY_OP_MULTIPLY_FLOAT	566,651,057	280,331,323	-50.5%
LOAD_NAME	9,738,721	4,862,941	-50.1%
LOAD_ATTR_METHOD_WITH_VALUES	2,160,388,079	1,082,819,793	-49.9%
SWAP	467,639,341	236,112,843	-49.5%
CALL_KW_PY	102,915,241	52,321,365	-49.2%
IS_OP	331,727,692	172,162,072	-48.1%
NOP	1,062,193,345	564,885,671	-46.8%
BINARY_OP_ADD_INT	1,138,258,061	608,561,408	-46.5%
TO_BOOL_LIST	43,852,378	23,474,430	-46.5%
BINARY_OP_SUBTRACT_FLOAT	98,631,029	52,810,199	-46.5%
BINARY_OP_SUBSCR_DICT	495,978,463	266,914,807	-46.2%
CALL_PY_GENERAL	371,559,805	202,824,076	-45.4%
LOAD_FAST_BORROW_LOAD_FAST_BORROW	4,805,967,834	2,628,546,030	-45.3%
CALL_TYPE_1	110,723,948	60,684,174	-45.2%
BINARY_SLICE	201,330,139	110,727,411	-45.0%
LOAD_FAST	601,350,856	333,696,892	-44.5%
CALL_PY_EXACT_ARGS	2,937,162,502	1,630,527,459	-44.5%
LIST_APPEND	106,680,513	60,399,315	-43.4%
STORE_SLICE	1,232,574	700,470	-43.2%
BUILD_TUPLE	659,304,925	375,990,288	-43.0%
TO_BOOL_BOOL	3,441,114,305	1,972,761,042	-42.7%
CALL_BOUND_METHOD_EXACT_ARGS	137,555,096	79,685,524	-42.1%
LOAD_ATTR_CLASS	326,076,973	189,315,120	-41.9%
POP_JUMP_IF_FALSE	5,878,233,483	3,421,606,207	-41.8%
LOAD_FAST_BORROW	24,754,061,638	14,526,411,192	-41.3%
CALL_METHOD_DESCRIPTOR_O	294,469,942	173,243,741	-41.2%
STORE_SUBSCR_DICT	145,103,532	86,172,997	-40.6%
BINARY_OP_MULTIPLY_INT	204,789,272	122,165,592	-40.3%
TO_BOOL_INT	166,356,574	99,906,203	-39.9%
LOAD_DEREF	875,188,307	526,719,635	-39.8%
LOAD_SMALL_INT	2,876,167,485	1,731,895,552	-39.8%
PUSH_NULL	994,029,135	607,235,981	-38.9%
TO_BOOL_ALWAYS_TRUE	131,623,204	80,821,986	-38.6%
COMPARE_OP_INT	1,634,533,262	1,011,543,007	-38.1%
LOAD_GLOBAL_MODULE	3,492,621,426	2,172,477,388	-37.8%
COMPARE_OP	150,014,195	94,875,954	-36.8%
BINARY_OP_SUBTRACT_INT	811,076,536	517,126,003	-36.2%
CALL_METHOD_DESCRIPTOR_FAST	294,213,956	188,208,435	-36.0%
BUILD_MAP	142,717,993	92,312,194	-35.3%
DICT_MERGE	71,757,010	46,992,365	-34.5%
POP_JUMP_IF_TRUE	1,440,129,677	950,065,263	-34.0%
GET_ITER	577,961,397	384,781,704	-33.4%
NOT_TAKEN	141,188,969	94,136,760	-33.3%
RETURN_VALUE	6,124,629,450	4,112,535,721	-32.9%
LOAD_ATTR_METHOD_NO_DICT	1,159,370,695	784,058,287	-32.4%
STORE_DEREF	70,690,423	47,947,777	-32.2%
TO_BOOL_STR	50,573,003	34,433,836	-31.9%
END_FOR	114,997,437	78,549,716	-31.7%
POP_TOP	3,109,550,598	2,127,573,469	-31.6%
COMPARE_OP_STR	485,760,040	334,047,666	-31.2%
FOR_ITER_TUPLE	172,411,400	119,592,701	-30.6%
LOAD_CONST	4,965,616,609	3,444,826,766	-30.6%
RESUME_CHECK	6,574,894,355	4,569,861,241	-30.5%
CALL_BUILTIN_FAST	373,628,804	260,244,123	-30.3%
CALL_LEN	442,902,429	309,132,998	-30.2%
CALL_BUILTIN_CLASS	315,189,478	220,652,894	-30.0%
POP_JUMP_IF_NOT_NONE	525,396,381	368,396,557	-29.9%
LOAD_FAST_CHECK	3,974,049	2,798,811	-29.6%
CALL_BUILTIN_FAST_WITH_KEYWORDS	96,006,319	124,373,731	29.5%
CALL_LIST_APPEND	205,967,469	146,400,430	-28.9%
LOAD_ATTR_NONDESCRIPTOR_NO_DICT	70,070,213	50,241,927	-28.3%
LOAD_GLOBAL_BUILTIN	3,167,792,857	2,273,223,292	-28.2%
LOAD_ATTR	611,397,968	439,646,639	-28.1%
BINARY_OP_SUBSCR_TUPLE_INT	249,354,279	181,534,949	-27.2%
CALL_ISINSTANCE	1,001,864,365	754,069,285	-24.7%
LOAD_SPECIAL	17,502,878	13,208,742	-24.5%
LOAD_ATTR_MODULE	509,446,612	384,922,282	-24.4%
SET_FUNCTION_ATTRIBUTE	54,367,312	67,081,179	23.4%
TO_BOOL	331,904,936	257,302,334	-22.5%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	40,585,194	31,862,352	-21.5%
CALL_METHOD_DESCRIPTOR_NOARGS	180,863,719	142,357,278	-21.3%
CALL_KW_NON_PY	41,073,053	32,548,469	-20.8%
CALL_NON_PY_GENERAL	553,334,664	441,751,511	-20.2%
BINARY_OP_SUBSCR_LIST_SLICE	15,587,989	12,536,642	-19.6%
RETURN_GENERATOR	369,301,369	298,294,908	-19.2%
LOAD_FAST_LOAD_FAST	8,560,191	6,995,403	-18.3%
BUILD_LIST	196,697,499	162,725,700	-17.3%
EXIT_INIT_CHECK	323,949,428	268,979,493	-17.0%
CALL_ALLOC_AND_ENTER_INIT	326,002,332	270,856,784	-16.9%
STORE_ATTR	59,731,767	49,743,829	-16.7%
COMPARE_OP_FLOAT	158,660,697	132,787,743	-16.3%
BINARY_OP_ADD_UNICODE	114,562,392	96,316,197	-15.9%
LIST_EXTEND	42,461,499	35,752,991	-15.8%
LOAD_SUPER_ATTR_METHOD	61,108,541	51,565,358	-15.6%
CALL_STR_1	93,053,504	79,753,054	-14.3%
CALL_TUPLE_1	6,269,391	5,393,629	-14.0%
LOAD_ATTR_SLOT	3,023,920,687	2,654,135,749	-12.2%
LOAD_ATTR_PROPERTY	70,937,747	62,284,888	-12.2%
YIELD_VALUE	1,151,193,047	1,024,373,324	-11.0%
LOAD_FAST_AND_CLEAR	46,434,172	41,600,346	-10.4%
STORE_ATTR_SLOT	1,544,930,996	1,406,047,149	-9.0%
TO_BOOL_NONE	367,101,558	338,830,538	-7.7%
IMPORT_NAME	10,389,147	9,620,614	-7.4%
STORE_SUBSCR	122,065,495	113,094,554	-7.3%
JUMP_BACKWARD_NO_INTERRUPT	418,752,741	390,442,352	-6.8%
BINARY_OP_INPLACE_ADD_UNICODE	3,423,912	3,198,277	-6.6%
POP_ITER	630,088,168	669,231,904	6.2%
IMPORT_FROM	12,123,980	11,397,728	-6.0%
UNPACK_EX	235,809	222,353	-5.7%
LOAD_ATTR_WITH_HINT	71,547,633	67,478,459	-5.7%
SEND_GEN	593,230,363	559,677,514	-5.7%
MAKE_FUNCTION	70,255,285	73,708,597	4.9%
GET_YIELD_FROM_ITER	35,435,795	33,750,206	-4.8%
CALL_INTRINSIC_1	143,959,103	137,925,167	-4.2%
CONVERT_VALUE	36,897,410	35,399,842	-4.1%
FORMAT_SIMPLE	43,316,829	41,891,967	-3.3%
BUILD_STRING	22,179,370	21,473,025	-3.2%
GET_AWAITABLE	172,683,388	167,281,630	-3.1%
JUMP_BACKWARD_NO_JIT	6,775,330	6,590,497	-2.7%
END_SEND	302,140,427	294,941,984	-2.4%
COPY_FREE_VARS	297,141,912	290,100,969	-2.4%
INTERPRETER_EXIT	1,890,272,073	1,877,258,578	-0.7%
CALL_KW	11,666	11,728	0.5%
CALL_FUNCTION_EX	219,562,308	218,674,065	-0.4%
LOAD_SUPER_ATTR_ATTR	4,510,099	4,492,301	-0.4%
CALL	222,251	222,781	0.2%
POP_EXCEPT	25,553,813	25,522,892	-0.1%
JUMP_BACKWARD	6,520	6,525	0.1%
RESUME	31,203	31,180	-0.1%
BUILD_SET	437,239	437,368	0.0%
SEND	128,440,667	128,462,069	0.0%
CLEANUP_THROW	91,596	91,588	-0.0%
STORE_ATTR_WITH_HINT	8,975,993	8,975,373	-0.0%
DELETE_ATTR	331,596	331,577	-0.0%
LOAD_GLOBAL	14,736,780	14,737,430	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	9,211,860	9,211,958	0.0%
CHECK_EXC_MATCH	25,211,120	25,210,920	-0.0%
PUSH_EXC_INFO	25,553,815	25,553,615	-0.0%
RAISE_VARARGS	8,594,614	8,594,656	0.0%
RERAISE	6,248,578	6,248,570	-0.0%
INSTRUMENTED_LINE	58,270,440	58,270,440	0.0%
DELETE_FAST	41,964,183	41,964,183	0.0%
INSTRUMENTED_RESUME	29,134,740	29,134,740	0.0%
INSTRUMENTED_RETURN_VALUE	29,134,440	29,134,440	0.0%
GET_AITER	6,000,000	6,000,000	0.0%
GET_ANEXT	6,000,000	6,000,000	0.0%
END_ASYNC_FOR	6,000,000	6,000,000	0.0%
SET_ADD	73,592	73,592	0.0%
SET_UPDATE	68,063	68,063	0.0%
LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN	49,580	49,580	0.0%
STORE_NAME	47,906	47,906	0.0%
DICT_UPDATE	14,747	14,747	0.0%
WITH_EXCEPT_START	9,631	9,631	0.0%
LOAD_BUILD_CLASS	3,375	3,375	0.0%
LOAD_LOCALS	3,352	3,352	0.0%
FORMAT_WITH_SPEC	2,740	2,740	0.0%
LOAD_SUPER_ATTR	2,347	2,347	0.0%
LOAD_FROM_DICT_OR_DEREF	1,460	1,460	0.0%
INSTRUMENTED_JUMP_BACKWARD	120	120	0.0%
SETUP_ANNOTATIONS	117	117	0.0%
DELETE_NAME	15	15	0.0%

Pair counts

Pair counts for top 100 opcode pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Predecessor/Successor Pairs

Top 5 predecessors and successors of each Tier 1 opcode.

This does not include the unspecialized instructions that occur after a specialized instruction deoptimizes.

Not included in comparative output.

Specialization stats

Specialization stats by family

BINARY_OP

specialization stats for BINARY_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,350,514,188	7.5%	581,712,214	3.4%	-56.9%
miss ⓘ Specialized instructions that deopt.	61,043,817	0.3%	40,363,149	0.2%	-33.9%
hit ⓘ Specialized instructions that complete.	16,712,947,143	92.2%	16,580,749,816	96.4%	-0.8%
deopt ⓘ Specialized instructions that deopt.			1,063	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	552,378	32.1%	343,058	30.6%	-37.9%
Success	1,168,031	67.9%	778,392	69.4%	-33.4%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
and other	317	0.1%	1,077	0.3%	239.7%
subscr bytes	1,808	0.3%	4,448	1.3%	146.0%
subscr mappingproxy	60	0.0%	140	0.0%	133.3%
subscr	7,090	1.3%	13,798	4.0%	94.6%
true divide float	11,587	2.1%	1,467	0.4%	-87.3%
subscr array	36,682	6.6%	6,512	1.9%	-82.2%
xor int	16,760	3.0%	3,680	1.1%	-78.0%
rshift	11,290	2.0%	2,659	0.8%	-76.4%
lshift	15,422	2.8%	4,364	1.3%	-71.7%
and int	18,469	3.3%	7,869	2.3%	-57.4%
remainder	36,887	6.7%	16,179	4.7%	-56.1%
add different types	25,648	4.6%	12,380	3.6%	-51.7%
subscr defaultdict	63,494	11.5%	33,789	9.8%	-46.8%
out of range	41,347	7.5%	24,648	7.2%	-40.4%
subtract other	8,368	1.5%	5,231	1.5%	-37.5%
floor divide	30,096	5.4%	19,143	5.6%	-36.4%
subscr tuple slice	109,554	19.8%	82,056	23.9%	-25.1%
add other	38,233	6.9%	29,273	8.5%	-23.4%
multiply other	15,674	2.8%	12,053	3.5%	-23.1%
xor	140	0.0%	120	0.0%	-14.3%
multiply different types	13,958	2.5%	12,760	3.7%	-8.6%
subscr string slice	2,261	0.4%	2,443	0.7%	8.0%
true divide different types	2,114	0.4%	2,002	0.6%	-5.3%
or	3,100	0.6%	2,971	0.9%	-4.2%
true divide other	1,387	0.3%	1,343	0.4%	-3.2%
subtract different types	630	0.1%	648	0.2%	2.9%
subscr range	3,162	0.6%	3,122	0.9%	-1.3%
subscr deque	115	0.0%	116	0.0%	0.9%
subscr counter	26,852	4.9%	26,892	7.8%	0.1%
power	9,121	1.7%	9,123	2.7%	0.0%
subscr other slice	311	0.1%	311	0.1%	0.0%
or different types	156	0.0%	156	0.0%	0.0%
subscr structtime	140	0.0%	140	0.0%	0.0%
code complex parameters	60	0.0%	60	0.0%	0.0%
and different types	41	0.0%	41	0.0%	0.0%
subscr ordereddict	23	0.0%	23	0.0%	0.0%
or int	20	0.0%	20	0.0%	0.0%
subscr enumdict	1	0.0%	1	0.0%	0.0%

BINARY_SLICE

specialization stats for BINARY_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	201,330,139	100.0%	110,727,411	100.0%	-45.0%

CALL

specialization stats for CALL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deopt ⓘ Specialized instructions that deopt.	8,000	0.0%	31,501	0.0%	293.8%
miss ⓘ Specialized instructions that deopt.	184,570,027	1.4%	139,086,357	1.1%	-24.6%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	181,150,357	1.4%	136,511,523	1.1%	-24.6%
hit ⓘ Specialized instructions that complete.	12,601,926,233	98.6%	12,505,587,047	98.9%	-0.8%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,641,774	100.0%	2,797,468	100.0%	-23.2%
Failure	147	0.0%	147	0.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
init not python	266	181.0%	286	194.6%	7.5%
init not simple	731	497.3%	731	497.3%	0.0%
out of versions	147	100.0%	147	100.0%	0.0%

CALL_KW

specialization stats for CALL_KW family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	537,918	96.6%	537,918	96.6%	0.0%
miss ⓘ Specialized instructions that deopt.	545,009	97.9%	545,009	97.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	18,757	100.0%	18,819	100.0%	0.3%
Failure	0	0.0%	0	0.0%

COMPARE_OP

specialization stats for COMPARE_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	149,872,904	2.7%	94,748,478	1.8%	-36.8%
miss ⓘ Specialized instructions that deopt.	1,306,267	0.0%	1,047,201	0.0%	-19.8%
hit ⓘ Specialized instructions that complete.	5,316,388,628	97.2%	5,273,361,516	98.2%	-0.8%
deopt ⓘ Specialized instructions that deopt.			60	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	119,669	72.1%	105,883	71.9%	-11.5%
Success	46,202	27.9%	41,338	28.1%	-10.5%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
bytes	1,398	1.2%	4,018	3.8%	187.4%
float long	14,421	12.1%	6,931	6.5%	-51.9%
bool	1,865	1.6%	1,123	1.1%	-39.8%
baseobject	6,423	5.4%	7,944	7.5%	23.7%
different types	38,928	32.5%	34,008	32.1%	-12.6%
other	10,653	8.9%	9,388	8.9%	-11.9%
big int	30,251	25.3%	27,124	25.6%	-10.3%
string	9,729	8.1%	9,225	8.7%	-5.2%
tuple	4,105	3.4%	4,205	4.0%	2.4%
list	911	0.8%	931	0.9%	2.2%
set	801	0.7%	802	0.8%	0.1%
long float	184	0.2%	184	0.2%	0.0%

CONTAINS_OP

specialization stats for CONTAINS_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	158,391,776	6.7%	61,773,398	2.7%	-61.0%
hit ⓘ Specialized instructions that complete.	2,191,460,735	93.2%	2,187,469,371	97.2%	-0.2%
miss ⓘ Specialized instructions that deopt.	1,402,138	0.1%	1,400,826	0.1%	-0.1%
deopt ⓘ Specialized instructions that deopt.			42	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	58,800	67.5%	126,502	81.7%	115.1%
Success	28,320	32.5%	28,320	18.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
str	11,038	18.8%	93,223	73.7%	744.6%
list	28,522	48.5%	12,881	10.2%	-54.8%
tuple	10,040	17.1%	12,748	10.1%	27.0%
other	9,200	15.6%	7,650	6.0%	-16.8%

FOR_ITER

specialization stats for FOR_ITER family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	310,043,480	16.7%	92,824,526	11.6%	-70.1%
miss ⓘ Specialized instructions that deopt.	61,944,638	3.3%	23,039,729	2.9%	-62.8%
hit ⓘ Specialized instructions that complete.	1,489,689,305	80.0%	674,739,520	84.7%	-54.7%
deopt ⓘ Specialized instructions that deopt.			164,635	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	134,076	10.2%	6,229,820	91.3%	4,546.5%
Success	1,174,404	89.8%	594,574	8.7%	-49.4%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
map	251	0.2%	476,371	7.6%	189,689.2%
ascii string	1,177	0.9%	359,727	5.8%	30,463.0%
dict items	51,352	38.3%	4,307,272	69.1%	8,287.7%
list	16,337	12.2%	777,227	12.5%	4,657.5%
seq iter	5,271	3.9%	137,893	2.2%	2,516.1%
itertools	3,473	2.6%	77,993	1.3%	2,145.7%
callable	114	0.1%	1,914	0.0%	1,578.9%
enumerate	16,190	12.1%	59,615	1.0%	268.2%
zip	4,161	3.1%	9,831	0.2%	136.3%
tuple	232	0.2%	545	0.0%	134.9%
dict keys	10,920	8.1%	3,973	0.1%	-63.6%
other	4,459	3.3%	2,331	0.0%	-47.7%
reversed list	1,730	1.3%	970	0.0%	-43.9%
set	12,469	9.3%	7,083	0.1%	-43.2%
dict values	5,580	4.2%	6,795	0.1%	21.8%
bytes	320	0.2%	280	0.0%	-12.5%
string	40	0.0%

GET_ITER

specialization stats for GET_ITER family

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	126,471,391	126,471,391 / 0 !!	123,354,153	123,354,153 / 0 !!	-2.5%
list	311,635,459	311,635,459 / 0 !!	307,485,933	307,485,933 / 0 !!	-1.3%
set	12,082,113	12,082,113 / 0 !!	12,130,252	12,130,252 / 0 !!	0.4%
generator	101,610,581	101,610,581 / 0 !!	101,219,186	101,219,186 / 0 !!	-0.4%
self	322,214,921	322,214,921 / 0 !!	322,026,255	322,026,255 / 0 !!	-0.1%
enumerate	5,390,703	5,390,703 / 0 !!	5,388,867	5,388,867 / 0 !!	-0.0%
tuple	172,650,014	172,650,014 / 0 !!	172,617,263	172,617,263 / 0 !!	-0.0%
dict keys	34,819,624	34,819,624 / 0 !!	34,819,578	34,819,578 / 0 !!	-0.0%
string	2,768,970	2,768,970 / 0 !!	2,768,970	2,768,970 / 0 !!	0.0%
bytes	775,440	775,440 / 0 !!	775,440	775,440 / 0 !!	0.0%

LOAD_ATTR

specialization stats for LOAD_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deopt ⓘ Specialized instructions that deopt.	1,422,762	0.0%	2,148,746	0.0%	51.0%
miss ⓘ Specialized instructions that deopt.	785,153,136	5.0%	434,399,258	3.1%	-44.7%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	609,708,003	3.9%	437,699,943	3.1%	-28.2%
hit ⓘ Specialized instructions that complete.	14,323,879,124	91.1%	13,231,597,477	93.8%	-7.6%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	464,761	3.0%	1,477,137	14.5%	217.8%
Success	14,886,557	97.0%	8,738,628	85.5%	-41.3%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
not managed dict	1,869	0.4%	257,686	17.4%	13,687.4%
module attr not found	22,388	4.8%	532,954	36.1%	2,280.5%
method	44,316	9.5%	378,929	25.7%	755.1%
class attr simple	823	0.2%	4,601	0.3%	459.1%
not in dict	603	0.1%	1,232	0.1%	104.3%
mutable class	47,781	10.3%	74,822	5.1%	56.6%
metaclass attribute	22,240	4.8%	30,207	2.0%	35.8%
overridden	7,713	1.7%	10,396	0.7%	34.8%
class method obj	17,058	3.7%	13,119	0.9%	-23.1%
overriding descriptor	45,077	9.7%	37,034	2.5%	-17.8%
out of versions	400	0.1%	380	0.0%	-5.0%
builtin class method	718	0.2%	742	0.1%	3.3%
non overriding descriptor	4,864	1.0%	4,944	0.3%	1.6%
expected error	2,373	0.5%	2,397	0.2%	1.0%
non object slot	1,139	0.2%	1,139	0.1%	0.0%
wrong number arguments	200	0.0%	200	0.0%	0.0%
property	46	0.0%	46	0.0%	0.0%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	6,705,944,105	99.8%	5,622,293,170	99.7%	-16.2%
miss ⓘ Specialized instructions that deopt.	41,979	0.0%	41,954	0.0%	-0.1%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	14,612,709	0.2%	14,612,686	0.3%	-0.0%
deopt ⓘ Specialized instructions that deopt.	11	0.0%	11	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	124,775	100.0%	125,450	100.0%	0.5%
Failure	0	0.0%	0	0.0%

LOAD_SUPER_ATTR

specialization stats for LOAD_SUPER_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	65,622,625	100.0%	65,707,027	100.0%	0.1%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	122	0.0%	122	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,225	100.0%	2,225	100.0%	0.0%
Failure	0	0.0%	0	0.0%

SEND

specialization stats for SEND family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	128,406,370	17.8%	128,405,906	17.8%	-0.0%
hit ⓘ Specialized instructions that complete.	593,215,652	82.2%	593,215,681	82.2%	0.0%
miss ⓘ Specialized instructions that deopt.	14,711	0.0%	14,711	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	33,953	98.2%	55,819	98.9%	64.4%
Success	616	1.8%	616	1.1%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
async generator send	24,440	72.0%	45,960	82.3%	88.1%
other	5,948	17.5%	6,295	11.3%	5.8%
tuple	640	1.9%	660	1.2%	3.1%
list	2,925	8.6%	2,904	5.2%	-0.7%

STORE_ATTR

specialization stats for STORE_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
miss ⓘ Specialized instructions that deopt.	113,414,470	4.1%	74,653,329	2.7%	-34.2%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	59,648,811	2.1%	49,476,358	1.8%	-17.1%
hit ⓘ Specialized instructions that complete.	2,604,404,729	93.8%	2,600,162,167	95.4%	-0.2%
deopt ⓘ Specialized instructions that deopt.			15,365	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	43,984	2.0%	228,157	13.5%	418.7%
Success	2,178,571	98.0%	1,455,734	86.5%	-33.2%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
class attr simple	20,345	46.3%	205,593	90.1%	910.5%
other	236,191	537.0%	117,928	51.7%	-50.1%
split dict	3,719	8.5%	2,259	1.0%	-39.3%
property	1,729	3.9%	2,326	1.0%	34.5%
non object slot	94	0.2%	115	0.1%	22.3%
not in keys	749	1.7%	829	0.4%	10.7%
method	421	1.0%	377	0.2%	-10.5%
overriding descriptor	4,889	11.1%	4,712	2.1%	-3.6%
not in dict	7,206	16.4%	7,106	3.1%	-1.4%
not managed dict	2,988	6.8%	2,994	1.3%	0.2%
overridden	313	0.7%	313	0.1%	0.0%
no dict	101	0.2%	101	0.0%	0.0%
mutable class	89	0.2%	89	0.0%	0.0%

STORE_SLICE

specialization stats for STORE_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,232,574	100.0%	700,470	100.0%	-43.2%

STORE_SUBSCR

specialization stats for STORE_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	122,021,769	11.4%	113,050,608	10.7%	-7.4%
hit ⓘ Specialized instructions that complete.	949,073,122	88.6%	946,980,192	89.3%	-0.2%
miss ⓘ Specialized instructions that deopt.	2,220	0.0%	2,220	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	40,810	93.2%	41,028	93.3%	0.5%
Success	2,956	6.8%	2,958	6.7%	0.1%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict subclass no override	3,923	9.6%	14,269	34.8%	263.7%
bytearray int	136	0.3%	240	0.6%	76.5%
out of range	1,673	4.1%	493	1.2%	-70.5%
array int	14,377	35.2%	8,238	20.1%	-42.7%
list slice	2,976	7.3%	2,276	5.5%	-23.5%
py simple	17,329	42.5%	15,076	36.7%	-13.0%
other	328	0.8%	368	0.9%	12.2%
array slice	68	0.2%	68	0.2%	0.0%

TO_BOOL

specialization stats for TO_BOOL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	331,280,679	5.8%	256,765,889	4.9%	-22.5%
miss ⓘ Specialized instructions that deopt.	66,398,834	1.2%	57,396,688	1.1%	-13.6%
hit ⓘ Specialized instructions that complete.	5,299,259,668	93.0%	4,892,273,638	94.0%	-7.7%
deopt ⓘ Specialized instructions that deopt.			6,995	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	574,934	30.7%	486,988	30.0%	-15.3%
Success	1,300,710	69.3%	1,135,515	70.0%	-12.7%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
tuple	76,245	13.3%	152,965	31.4%	100.6%
float	382	0.1%	22	0.0%	-94.2%
other	84,213	14.6%	4,875	1.0%	-94.2%
mapping	71,861	12.5%	7,089	1.5%	-90.1%
sequence	9,524	1.7%	5,480	1.1%	-42.5%
bytes	2,621	0.5%	1,521	0.3%	-42.0%
dict	11,532	2.0%	7,609	1.6%	-34.0%
number	308,986	53.7%	298,121	61.2%	-3.5%
set	9,483	1.6%	9,219	1.9%	-2.8%
memory view	87	0.0%	87	0.0%	0.0%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,204,378	0.1%	453,232	0.0%	-62.4%
miss ⓘ Specialized instructions that deopt.	3,700	0.0%	3,220	0.0%	-13.0%
hit ⓘ Specialized instructions that complete.	1,270,926,067	99.9%	1,256,517,986	100.0%	-1.1%
deopt ⓘ Specialized instructions that deopt.			20	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	736	7.0%	766	7.2%	4.1%
Success	9,779	93.0%	9,839	92.8%	0.6%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	99	13.5%	120	15.7%	21.2%
sequence	505	68.6%	514	67.1%	1.8%
iterator	132	17.9%	132	17.2%	0.0%

Specialization effectiveness

specialization effectiveness

All entries are execution counts. Should add up to the total number of Tier 1 instructions executed.

Instructions	Base Count	Base Ratio	Head Count	Head Ratio	Change
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	4,019,985,923	3.0%	2,337,806,743	2.8%	-41.8%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	1,276,002,561	1.0%	772,140,308	0.9%	-39.5%
Specialized hits ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.	52,002,222,396	38.7%	31,517,458,251	37.7%	-39.4%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	76,952,971,057	57.3%	48,988,273,210	58.6%	-36.3%

Deferred by instruction

Breakdown of deferred (not specialized) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
FOR_ITER	310,043,480	8.6%	92,824,526	4.5%	-70.1%
CONTAINS_OP	158,391,776	4.4%	61,773,398	3.0%	-61.0%
BINARY_OP	1,350,514,188	37.3%	581,712,214	28.0%	-56.9%
BINARY_SLICE	201,330,139	5.6%	110,727,411	5.3%	-45.0%
COMPARE_OP	149,872,904	4.1%	94,748,478	4.6%	-36.8%
LOAD_ATTR	609,708,003	16.8%	437,699,943	21.0%	-28.2%
CALL	181,150,357	5.0%	136,511,523	6.6%	-24.6%
TO_BOOL	331,280,679	9.2%	256,765,889	12.3%	-22.5%
STORE_SUBSCR	122,021,769	3.4%	113,050,608	5.4%	-7.4%
SEND	128,406,370	3.5%	128,405,906	6.2%	-0.0%

Misses by instruction

Breakdown of misses (specialized deopts) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
LOAD_ATTR_METHOD_WITH_VALUES	248,651,374	19.5%	109,188,091	14.1%	-56.1%
LOAD_ATTR_INSTANCE_VALUE	326,266,651	25.6%	150,668,071	19.5%	-53.8%
STORE_ATTR_INSTANCE_VALUE	93,618,063	7.3%	54,868,965	7.1%	-41.4%
CALL_PY_EXACT_ARGS	78,477,963	6.1%	51,243,012	6.6%	-34.7%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	75,511,415	5.9%	54,278,537	7.0%	-28.1%
TO_BOOL_NONE	32,152,900	2.5%	28,067,251	3.6%	-12.7%
TO_BOOL_ALWAYS_TRUE	27,564,123	2.2%	24,978,579	3.2%	-9.4%
LOAD_ATTR_SLOT	80,511,235	6.3%	73,535,405	9.5%	-8.7%
FOR_ITER_LIST	30,933,616	2.4%
FOR_ITER_TUPLE	30,884,246	2.4%
CALL_METHOD_DESCRIPTOR_O			24,854,440	3.2%
CALL_METHOD_DESCRIPTOR_NOARGS			20,872,266	2.7%

Call stats

Inlined calls and frame stats

This shows what fraction of calls to Python functions are inlined (i.e. not having a call at the C level) and for those that are not, where the call comes from. The various categories overlap.

Also includes the count of frame objects created.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Calls via PyEval_EvalFrame (legacy)	4,273,296	0.1%	2,128,101	0.0%	-50.2%
Calls to Python functions inlined	6,026,118,478	76.1%	5,857,009,009	75.7%	-2.8%
Frame objects created	78,007,742	1.0%	76,010,562	1.0%	-2.6%
Frames pushed	6,692,028,625	84.5%	6,551,009,852	84.7%	-2.1%
Calls via PyEval_EvalFrame (generator)	613,945,254	7.8%	605,363,982	7.8%	-1.4%
Calls to PyEval_EvalDefault	1,894,748,115	23.9%	1,881,734,603	24.3%	-0.7%
Calls via PyEval_EvalFrame (total)	1,894,748,115	23.9%	1,881,734,603	24.3%	-0.7%
Calls via PyEval_EvalFrame (vector)	1,280,802,861	16.2%	1,276,370,621	16.5%	-0.3%
Calls via PyEval_EvalFrame (method)	141,112,765	1.8%	140,848,809	1.8%	-0.2%
Calls via PyEval_EvalFrame (function vectorcall)	1,276,526,190	16.1%	1,274,239,145	16.5%	-0.2%
Calls via PyEval_EvalFrame (api)	458,246,253	5.8%	457,714,320	5.9%	-0.1%
Calls via PyEval_EvalFrame (slot)	305,854,240	3.9%	305,854,903	4.0%	0.0%
Calls via PyEval_EvalFrame (function ex)	24,439,833	0.3%	24,439,836	0.3%	0.0%
Calls via PyEval_EvalFrame (build class)	3,375	0.0%	3,375	0.0%	0.0%

Object stats

Allocations, frees and dict materializatons

Below, "allocations" means "allocations that are not from a freelist". Total allocations = "Allocations from freelist" + "Allocations".

"Inline values" is the number of values arrays inlined into objects.

The cache hit/miss numbers are for the MRO cache, split into dunder and other names.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Interpreter mortal increfs	30,315,962,253	31.1%	20,556,828,118	21.4%	-32.2%
Interpreter immortal decrefs	1,475,369,771	1.3%	1,105,155,383	1.0%	-25.1%
Mortal increfs	38,021,167,062	39.0%	46,714,294,527	48.7%	22.9%
Interpreter mortal decrefs	39,305,994,934	35.1%	32,352,037,633	29.3%	-17.7%
Interpreter immortal increfs	4,016,235,923	4.1%	3,314,885,353	3.5%	-17.5%
Materialize dict (on request)	4,056,483	2.1%	3,390,883	1.8%	-16.4%
Method cache hits	2,300,074,768		1,953,964,265		-15.0%
Mortal decrefs	47,355,402,945	42.2%	53,040,103,941	48.0%	12.0%
Method cache dunder misses	6,230,532		6,512,580		4.5%
Frees to freelist	13,845,791,930		13,662,123,949		-1.3%
Allocations from freelist	13,845,600,010	70.3%	13,661,942,791	70.1%	-1.3%
Allocations to 512 bytes	5,782,068,426	29.3%	5,753,872,573	29.5%	-0.5%
Frees	6,452,176,760		6,420,993,544		-0.5%
Allocations	5,860,221,974	29.7%	5,832,103,099	29.9%	-0.5%
Method cache dunder hits	2,889,855,749		2,876,138,324		-0.5%
Method cache collisions	61,630,374		61,909,328		0.5%
Immortal increfs	25,222,819,420	25.8%	25,332,446,786	26.4%	0.4%
Allocations over 4 kbytes	6,775,536	0.0%	6,799,209	0.0%	0.3%
Inline values	190,517,854		189,911,190		-0.3%
Immortal decrefs	23,949,575,720	21.4%	23,893,691,504	21.6%	-0.2%
Method cache misses	56,202,928		56,140,672		-0.1%
Allocations to 4 kbytes	71,378,012	0.4%	71,431,317	0.4%	0.1%
Materialize dict (new key)	264,809	0.1%	264,809	0.1%	0.0%
Materialize dict (too big)	4,404	0.0%	4,404	0.0%	0.0%
Materialize dict (str subclass)	0	0.0%	0	0.0%

GC stats

GC collections and effectiveness

Collected/visits gives some measure of efficiency.

Generation	Base Collections	Base Objects collected	Base Object visits	Base Reachable from roots	Base Not reachable from roots	Head Collections	Head Objects collected	Head Object visits	Head Reachable from roots	Head Not reachable from roots
0	0	0	0	0	0	0	0	0	0	0
1	358,124	98,775,759	9,544,198,110	776,465,701	747,993,672	357,669	98,916,343	9,562,006,244	775,398,725	748,357,383
2	15,998	8,734,250	11,440,437,150	0	0	15,998	8,734,250	11,441,288,766	0	0

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Optimization attempts ⓘ The number of times a potential trace is identified. Specifically, this occurs in the JUMP BACKWARD instruction when the counter reaches a threshold.	502,367		24,299,847		4,737.1%
Trace too long ⓘ A trace is truncated because it is longer than the instruction buffer.	60	0.0%	1,576	0.0%	2,526.7%
Inner loop found ⓘ A trace is truncated because it has an inner loop	693	0.1%	7,352	0.0%	960.9%
Traces created ⓘ The number of traces that were successfully created.	23,056	4.6%	94,022	0.4%	307.8%
Executors invalidated ⓘ The number of executors that were invalidated due to watched dictionary changes.	240	1.0%	525	0.6%	118.8%
Trace stack overflow ⓘ A trace is truncated because it would require more than 5 stack frames.	62	0.0%	0	0.0%	-100.0%
Trace stack underflow ⓘ A potential trace is abandoned because it pops more frames than it pushes.	217,689	43.3%	0	0.0%	-100.0%
Trace too short ⓘ A potential trace is abandoned because it is too short.	47,608	9.5%	0	0.0%	-100.0%
Recursive call ⓘ A trace is truncated because it has a recursive call.	747	0.1%	0	0.0%	-100.0%
Low confidence ⓘ A trace is abandoned because the likelihood of the jump to top being taken is too low.	624	0.1%	0	0.0%	-100.0%
Unknown callee ⓘ A trace is abandoned because the target of a call is unknown.	213,952	42.6%	0	0.0%	-100.0%
Uops executed ⓘ The total number of uops (micro-operations) that were executed	231,341,483,183	5,313.7%	355,925,954,195	6,050.3%	53.9%
Traces executed ⓘ The number of traces that were executed	4,353,705,071		5,882,818,893		35.1%

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Optimizer successes ⓘ The number of traces that were successfully optimized.	19,756	85.7%	92,755	98.7%	369.5%
Optimizer attempts ⓘ The number of times the trace optimizer (_Py_uop_analyze_and_optimize) was run.	23,056		94,022		307.8%
Optimizer no memory ⓘ The number of optimizations that failed due to no memory.	0	0.0%	0	0.0%
Remove globals builtins changed ⓘ The builtins changed during optimization	0	0.0%	0	0.0%
Remove globals incorrect keys ⓘ The keys in the globals dictionary aren't what was expected	0	0.0%	0	0.0%

JIT memory stats

JIT memory stats

	Base Size (bytes)	Base Ratio	Head Size (bytes)	Head Ratio	Change
Freed memory size ⓘ The size of the memory freed from the JIT traces	815,104	0.5%	133,275,648	10.3%	16,250.8%
Code size ⓘ The size of the memory allocated for the code of the JIT traces	133,304,726	75.3%	1,086,482,281	83.7%	715.0%
Total memory size ⓘ The total size of the memory allocated for the JIT traces	177,147,904		1,298,219,008		632.8%
Data size ⓘ The size of the memory allocated for the data of the JIT traces	3,216,592	1.8%	21,008,720	1.6%	553.1%
Padding size ⓘ The size of the memory allocated for the padding of the JIT traces	40,606,750	22.9%	190,635,210	14.7%	369.5%
Trampoline size ⓘ The size of the memory allocated for the trampolines of the JIT traces	0	0.0%	0	0.0%

JIT trace total memory histogram

JIT trace total memory histogram

Size (bytes)	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 4,096	8,185	41.3%	29,840	32.2%	264.6%
<= 8,192	6,949	35.0%	24,462	26.4%	252.0%
<= 16,384	3,026	15.3%	19,843	21.4%	555.8%
<= 32,768	1,376	6.9%	11,636	12.5%	745.6%
<= 65,536	300	1.5%	5,267	5.7%	1,655.7%
<= 131,072			1,749	1.9%

Trace length histogram

trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 8	1,053	4.6%
<= 16	814	3.5%
<= 32	3,582	15.5%
<= 64	7,647	33.2%
<= 128	4,419	19.2%
<= 256	4,212	18.3%
<= 512	1,201	5.2%
<= 1,024	128	0.6%

Optimized trace length histogram

optimized trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 4	673	2.9%	20	0.0%	-97.0%
<= 8	526	2.3%	788	0.8%	49.8%
<= 16	1,988	8.6%	12,944	13.8%	551.1%
<= 32	7,051	30.6%	23,914	25.4%	239.2%
<= 64	6,044	26.2%	23,784	25.3%	293.5%
<= 128	1,858	8.1%	14,784	15.7%	695.7%
<= 256	1,385	6.0%	11,432	12.2%	725.4%
<= 512	231	1.0%	3,693	3.9%	1,498.7%
<= 1,024			1,396	1.5%

Trace run length histogram

trace run length histogram

Uop execution stats

uop execution stats

Name	Base Count	Head Count	Change
_LOAD_SUPER_ATTR_METHOD	3,985	9,631,497	241,593.8%
_DELETE_SUBSCR	54,160	105,354,936	194,425.4%
_LOAD_SMALL_INT_1	269,900	200,344,723	74,129.2%
_LOAD_SMALL_INT_0	352,940	161,216,213	45,578.1%
_GUARD_CALLABLE_ISINSTANCE	449,298	192,669,954	42,782.4%
_GUARD_THIRD_NULL	449,298	192,669,954	42,782.4%
_GUARD_NOS_NULL	270,020	101,270,628	37,404.9%
_ERROR_POP_N	263	95,149	36,078.3%
_MAKE_CELL	160,148	39,534,581	24,586.3%
_UNARY_NOT	212,260	48,642,286	22,816.4%
_LOAD_ATTR_MODULE	471,948	65,182,589	13,711.4%
_UNARY_NEGATIVE	954,726	97,093,675	10,069.8%
_LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	363,240	35,182,347	9,585.7%
_GUARD_CALLABLE_LEN	1,120,240	84,370,266	7,431.4%
_INIT_CALL_PY_EXACT_ARGS_2	5,364,242	305,719,012	5,599.2%
_UNARY_INVERT	163,738	8,170,837	4,890.2%
_POP_TOP_LOAD_CONST_INLINE_BORROW	2,477,668	98,801,997	3,887.7%
_PUSH_NULL_CONDITIONAL	56,140,165	2,129,971,387	3,694.0%
_CALL_TUPLE_1	26,932	902,814	3,252.2%
_LOAD_CONST	23,245,502	699,039,344	2,907.2%
_LOAD_GLOBAL_MODULE	21,901,065	646,539,466	2,852.1%
_IMPORT_NAME	27,762	811,765	2,824.0%
_LOAD_GLOBAL_BUILTINS	23,670,736	530,094,978	2,139.5%
_GUARD_DORV_NO_DICT	28,058,849	591,609,608	2,008.5%
_STORE_ATTR_INSTANCE_VALUE	28,058,849	591,609,608	2,008.5%
_GUARD_TYPE_VERSION_AND_LOCK	29,686,209	592,866,952	1,897.1%
_CHECK_PEP_523	46,427,104	598,366,462	1,188.8%
_LOAD_ATTR_METHOD_WITH_VALUES	23,189,260	276,418,912	1,092.0%
_STORE_DEREF	2,834,024	25,576,556	802.5%
_LOAD_FAST_4	2,522,739	16,750,690	564.0%
_BUILD_MAP	8,093,835	53,176,495	557.0%
_COPY_1	56,148,891	359,351,062	540.0%
_LOAD_ATTR_CLASS	3,106,080	17,101,650	450.6%
_HANDLE_PENDING_AND_DEOPT	9,548	49,850	422.1%
_PY_FRAME_KW	12,237,291	63,541,912	419.2%
_CHECK_FUNCTION_VERSION_KW	12,237,291	62,777,901	413.0%
_DICT_MERGE	5,884,815	29,787,782	406.2%
_RETURN_VALUE	508,019,574	2,379,055,890	368.3%
_INIT_CALL_PY_EXACT_ARGS	6,137,792	27,598,058	349.6%
_GUARD_IS_NOT_NONE_POP	51,809,561	232,139,205	348.1%
_LOAD_FAST_2	21,198,257	90,125,843	325.2%
_GUARD_TOS_UNICODE	42,172,928	176,776,532	319.2%
_BINARY_OP_EXTEND	52,687,141	220,219,198	318.0%
_CHECK_FUNCTION_EXACT_ARGS	161,035,011	654,582,932	306.5%
_GUARD_BINARY_OP_EXTEND	62,227,141	246,184,018	295.6%
_CHECK_FUNCTION_VERSION	214,345,287	836,977,169	290.5%
_STORE_FAST_2	237,253,742	924,614,617	289.7%
_CHECK_STACK_SPACE	111,036,577	427,195,351	284.7%
_INIT_CALL_PY_EXACT_ARGS_0	136,472,141	522,750,931	283.0%
_PY_FRAME_GENERAL	45,540,800	174,045,233	282.2%
_LOAD_ATTR_WITH_HINT	1,323,217	4,944,047	273.6%
_BINARY_OP_MULTIPLY_FLOAT	82,564,084	296,696,358	259.4%
_CHECK_MANAGED_OBJECT_HAS_VALUES	920,227,297	3,287,458,673	257.2%
_LOAD_ATTR_INSTANCE_VALUE	920,184,857	3,286,760,280	257.2%
_STORE_ATTR_SLOT	59,184,907	198,069,274	234.7%
_STORE_ATTR	5,031,398	16,680,483	231.5%
_INIT_CALL_PY_EXACT_ARGS_1	217,964,985	688,077,785	215.7%
_DEOPT	9,888,557	30,633,770	209.8%
_UNPACK_SEQUENCE	364,500	1,115,742	206.1%
_INIT_CALL_PY_EXACT_ARGS_3	45,499,670	138,912,114	205.3%
_POP_TOP_NOP	118,787,328	359,083,896	202.3%
_CALL_BUILTIN_CLASS	40,807,623	122,131,787	199.3%
_PUSH_FRAME	967,662,494	2,881,160,699	197.7%
_GUARD_IS_NONE_POP	64,250,594	184,529,527	187.2%
_LOAD_FAST_0	26,137,232	73,693,385	181.9%
_BINARY_OP_ADD_UNICODE	10,088,679	27,484,042	172.4%
_STORE_FAST_3	337,632,045	887,736,480	162.9%
_SAVE_RETURN_OFFSET	967,662,494	2,428,945,488	151.0%
_CALL_METHOD_DESCRIPTOR_O	77,261,102	193,451,849	150.4%
_CHECK_RECURSION_REMAINING	967,662,494	2,420,610,150	150.2%
_RETURN_GENERATOR	47,734,139	118,582,412	148.4%
_TIER2_RESUME_CHECK	2,397,440,899	5,857,555,478	144.3%
_GUARD_TOS_TUPLE	345,586,121	840,446,524	143.2%
_CONTAINS_OP	69,094,889	164,736,462	138.4%
_CALL_ISINSTANCE	174,383,886	413,728,007	137.3%
_GUARD_KEYS_VERSION	750,237,687	1,748,856,354	133.1%
_GUARD_DORV_VALUES_INST_ATTR_FROM_DICT	750,380,347	1,749,162,753	133.1%
_UNPACK_SEQUENCE_TWO_TUPLE	263,469,479	612,762,614	132.6%
_CHECK_CALL_BOUND_METHOD_EXACT_ARGS	52,932,020	120,877,432	128.4%
_INIT_CALL_BOUND_METHOD_EXACT_ARGS	52,932,020	120,876,832	128.4%
_LOAD_FAST_1	90,677,910	201,807,865	122.6%
_LOAD_FAST_BORROW_0	3,265,354,636	7,251,242,185	122.1%
_POP_TOP	611,996,504	1,354,243,369	121.3%
_TO_BOOL_BOOL	900,380,128	1,967,653,751	118.5%
_GUARD_NOS_TUPLE	35,941,400	77,317,959	115.1%
_GUARD_TOS_FLOAT	298,345,881	637,794,888	113.8%
_BINARY_OP_SUBSCR_TUPLE_INT	42,078,620	88,300,578	109.8%
_CHECK_FUNCTION_VERSION_INLINE	775,374,192	1,619,158,143	108.8%
_CHECK_STACK_SPACE_OPERAND	450,781,074	928,691,232	106.0%
_GUARD_TYPE_VERSION	2,665,095,883	5,458,609,384	104.8%
_EXPAND_METHOD	5,976,000	11,812,160	97.7%
_LOAD_FAST_BORROW_2	1,748,431,000	3,325,714,778	90.2%
_BINARY_OP_MULTIPLY_INT	94,628,877	179,322,366	89.5%
_LOAD_ATTR_SLOT	429,239,042	789,249,405	83.9%
_CHECK_METHOD_VERSION	5,976,000	10,929,500	82.9%
_LOAD_FAST_BORROW_1	3,745,873,640	6,841,187,047	82.6%
_LOAD_CONST_UNDER_INLINE	1,079,652,386	1,892,717,818	75.3%
_CHECK_ATTR_METHOD_LAZY_DICT	44,368,140	76,332,516	72.0%
_LOAD_ATTR	304,711,809	523,891,126	71.9%
_GUARD_TOS_OVERFLOWED	144,983,587	248,861,149	71.6%
_LOAD_DEREF	488,643,802	837,252,573	71.3%
_BINARY_OP	1,074,713,527	1,807,095,638	68.1%
_CALL_METHOD_DESCRIPTOR_FAST	146,225,820	245,422,402	67.8%
_CALL_BUILTIN_FAST_WITH_KEYWORDS	50,628,850	16,790,385	-66.8%
_STORE_FAST_1	1,046,039,705	1,697,823,550	62.3%
_CHECK_ATTR_CLASS	213,637,320	344,795,136	61.4%
_GUARD_TOS_INT	1,781,318,394	2,870,330,054	61.1%
_UNPACK_SEQUENCE_TUPLE	237,193,280	364,481,094	53.7%
_CHECK_VALIDITY	33,528,158,745	51,026,563,994	52.2%
_STORE_FAST_6	404,658,256	615,550,643	52.1%
_SET_IP	38,093,474,674	57,748,460,399	51.6%
_GUARD_NOS_FLOAT	667,851,901	1,011,687,211	51.5%
_COMPARE_OP_FLOAT	37,039,760	55,746,907	50.5%
_LOAD_FAST_5	3,445,911	5,131,094	48.9%
_BINARY_OP_ADD_FLOAT	305,788,274	454,465,101	48.6%
_GUARD_NOS_INT	1,972,489,249	2,926,409,065	48.4%
_LOAD_FAST_BORROW_6	802,108,679	1,188,105,169	48.1%
_GUARD_GLOBALS_VERSION	2,191,253,508	3,224,968,699	47.2%
_BUILD_TUPLE	569,140,269	836,729,330	47.0%
_COLD_EXIT	733,956,790	1,074,189,749	46.4%
_GUARD_NOT_EXHAUSTED_RANGE	427,723,907	623,453,724	45.8%
_ITER_CHECK_RANGE	427,723,907	623,453,724	45.8%
_ITER_NEXT_RANGE	406,690,156	587,686,013	44.5%
_GUARD_NOS_DICT	403,392,661	579,333,123	43.6%
_MAP_ADD	40,824,726	58,441,513	43.2%
_CALL_KW_NON_PY	19,731,666	28,234,161	43.1%
_CHECK_IS_NOT_PY_CALLABLE_KW	19,731,666	28,234,161	43.1%
_IS_OP	252,648,121	360,088,943	42.5%
_GUARD_IS_TRUE_POP	2,652,727,191	3,757,999,484	41.7%
_TO_BOOL_INT	154,370,328	218,587,021	41.6%
_LOAD_FAST_BORROW_3	2,602,101,201	3,678,429,381	41.4%
_GUARD_NOT_EXHAUSTED_LIST	1,367,799,599	1,918,526,788	40.3%
_GUARD_TOS_DICT	248,909,661	347,704,013	39.7%
_TO_BOOL_STR	37,123,103	51,574,057	38.9%
_CONTAINS_OP_DICT	267,807,753	367,344,376	37.2%
_ITER_NEXT_LIST_TIER_TWO	1,239,566,240	1,699,845,743	37.1%
_GET_ITER	512,457,819	697,804,193	36.2%
_CALL_BUILTIN_O	573,328,659	779,574,530	36.0%
_COMPARE_OP_INT	1,656,392,397	2,246,158,419	35.6%
_ITER_CHECK_TUPLE	346,469,879	468,266,049	35.2%
_GUARD_IS_FALSE_POP	4,239,335,403	5,666,072,666	33.7%
_TO_BOOL	140,122,676	186,853,813	33.4%
_START_EXECUTOR	3,619,748,281	4,808,629,144	32.8%
_CHECK_PERIODIC	4,484,333,852	5,880,228,584	31.1%
_TO_BOOL_LIST	45,444,857	59,315,578	30.5%
_STORE_FAST_4	1,016,575,069	1,316,904,351	29.5%
_LIST_APPEND	156,757,059	202,991,417	29.5%
_BUILD_SLICE	103,178,700	132,744,560	28.7%
_ITER_CHECK_LIST	1,495,951,197	1,921,924,676	28.5%
_ITER_NEXT_TUPLE	233,408,249	299,571,595	28.3%
_STORE_FAST_0	142,238,307	182,531,754	28.3%
_BINARY_OP_SUBSCR_DICT	657,588,816	840,496,166	27.8%
_SET_FUNCTION_ATTRIBUTE	46,444,694	33,768,434	-27.3%
_BINARY_SLICE	340,710,360	428,650,420	25.8%
_STORE_FAST_5	799,901,312	1,001,407,174	25.2%
_LOAD_FAST_BORROW	7,718,377,029	9,658,990,401	25.1%
_CALL_NON_PY_GENERAL	409,400,187	512,310,817	25.1%
_PUSH_NULL	3,705,303,886	4,632,196,862	25.0%
_CHECK_IS_NOT_PY_CALLABLE	410,260,767	512,634,925	25.0%
_GUARD_NOS_UNICODE	982,829,517	1,227,575,828	24.9%
_LOAD_FAST	182,151,312	226,941,237	24.6%
_MAKE_WARM	5,988,562,462	7,456,788,729	24.5%
_STORE_SUBSCR_DICT	234,655,433	291,493,219	24.2%
_LOAD_FAST_AND_CLEAR	19,954,728	24,785,248	24.2%
_BINARY_OP_SUBTRACT_INT	1,123,240,005	1,391,654,493	23.9%
_POP_TOP_LOAD_CONST_INLINE	265,835,176	328,943,068	23.7%
_CALL_METHOD_DESCRIPTOR_NOARGS	155,495,534	191,903,541	23.4%
_LOAD_CONST_INLINE	2,832,406,093	3,475,336,631	22.7%
_BINARY_OP_ADD_INT	2,303,434,901	2,822,595,570	22.5%
_SWAP_2	899,831,056	1,098,573,250	22.1%
_STORE_FAST	3,866,115,190	4,717,533,595	22.0%
_GUARD_NOT_EXHAUSTED_TUPLE	345,775,945	416,958,209	20.6%
_LOAD_FAST_6	26,715,013	31,921,257	19.5%
_LOAD_ATTR_METHOD_NO_DICT	1,206,680,466	1,438,625,951	19.2%
_EXIT_TRACE	3,609,849,907	4,284,552,958	18.7%
_GUARD_NOS_LIST	2,345,782,880	2,771,322,125	18.1%
_BINARY_OP_SUBTRACT_FLOAT	182,690,748	215,524,794	18.0%
_BINARY_OP_SUBSCR_STR_INT	976,111,797	1,148,206,295	17.6%
_CALL_TYPE_1	263,274,974	309,608,190	17.6%
_BINARY_OP_SUBSCR_LIST_INT	2,141,356,686	2,494,109,681	16.5%
_FOR_ITER_TIER_TWO	1,212,714,853	1,402,777,363	15.7%
_LOAD_FAST_BORROW_4	3,879,492,723	4,486,113,651	15.6%
_STORE_SUBSCR_LIST_INT	471,717,352	544,318,799	15.4%
_LOAD_FAST_BORROW_5	3,755,811,616	4,333,204,109	15.4%
_CALL_STR_1	47,062,820	54,237,197	15.2%
_LOAD_CONST_INLINE_BORROW	10,637,123,816	12,224,923,314	14.9%
_CALL_BUILTIN_FAST	754,556,366	861,396,500	14.2%
_GUARD_TOS_LIST	105,457,097	120,219,924	14.0%
_LOAD_FAST_BORROW_7	2,723,841,411	3,059,798,568	12.3%
_CONTAINS_OP_SET	1,479,076,357	1,657,682,322	12.1%
_CALL_LEN	1,101,811,634	1,234,355,036	12.0%
_JUMP_TO_TOP	2,368,815,264	2,648,161,073	11.8%
_TO_BOOL_NONE	191,609,882	169,926,883	-11.3%
_COMPARE_OP_STR	1,345,308,739	1,494,124,709	11.1%
_COMPARE_OP	380,133,630	421,983,726	11.0%
_COPY_FREE_VARS	46,687,414	51,705,859	10.7%
_BINARY_OP_MULTIPLY_FLOAT__NO_DECREF_INPUTS	430,309,104	476,245,279	10.7%
_POP_ITER	421,109,310	376,472,619	-10.6%
_STORE_FAST_7	1,014,622,136	1,119,715,715	10.4%
_LIST_EXTEND	70,350,182	77,074,066	9.6%
_GUARD_NOS_OVERFLOWED	1,228,429,102	1,345,229,058	9.5%
_COPY_2	1,533,580,158	1,666,754,068	8.7%
_CALL_INTRINSIC_1	70,350,182	76,384,306	8.6%
_LOAD_FAST_3	78,215,044	84,276,278	7.7%
_GUARD_TOS_ANY_SET	1,198,887,372	1,286,607,554	7.3%
_MAKE_FUNCTION	47,882,593	44,466,952	-7.1%
_BUILD_LIST	485,047,588	519,066,510	7.0%
_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	120,157,171	128,488,375	6.9%
_GUARD_CALLABLE_LIST_APPEND	876,883,752	934,349,672	6.6%
_BINARY_OP_INPLACE_ADD_UNICODE	3,530,385	3,756,018	6.4%
_GUARD_NOS_NOT_NULL	876,883,752	930,598,343	6.1%
_CALL_LIST_APPEND	1,011,704,326	1,071,253,515	5.9%
_SWAP_3	758,452,303	786,516,344	3.7%
_POP_TOP_INT	16,730,708	17,333,842	3.6%
_UNPACK_SEQUENCE_LIST	60,012,240	61,406,803	2.3%
_CONVERT_VALUE	79,515,446	80,972,582	1.8%
_FORMAT_SIMPLE	80,015,830	81,400,260	1.7%
_BUILD_STRING	40,187,757	40,873,882	1.7%
_STORE_SUBSCR	569,327,453	565,297,697	-0.7%
_BINARY_OP_SUBSCR_LIST_SLICE	425,721,392	427,782,978	0.5%
_GUARD_TOS_SLICE	425,721,392	427,782,978	0.5%
_STORE_SLICE	111,492,300	112,024,400	0.5%
_INIT_CALL_PY_EXACT_ARGS_4	498,445,573	500,729,116	0.5%
_RESUME_CHECK	886,618,654
_GET_ANEXT	94,136,760	94,136,760	0.0%
_BINARY_OP_SUBTRACT_FLOAT__NO_DECREF_INPUTS	71,999,640	71,999,640	0.0%
_GUARD_IP		5,464,787,622
_DYNAMIC_EXIT		493,297,413
_FOR_ITER_GEN_FRAME		266,478,426
_BINARY_OP_SUBSCR_CHECK_FUNC		97,045,202
_BINARY_OP_SUBSCR_INIT_CALL		97,043,742
_YIELD_VALUE		85,988,621
_CHECK_AND_ALLOCATE_OBJECT		56,026,081
_CREATE_INIT_FRAME		55,143,001
_EXIT_INIT_CHECK		55,046,281
_END_FOR		36,251,360
_SEND_GEN_FRAME		33,552,878
_REPLACE_WITH_TRUE		21,669,505
_LOAD_COMMON_CONSTANT		19,742,125
_GUARD_CALLABLE_TYPE_1		18,871,484
_LOAD_FAST_7		17,778,639
_LOAD_SMALL_INT		17,046,994
_LOAD_ATTR_METHOD_LAZY_DICT		17,040,796
_LOAD_SMALL_INT_3		13,141,207
_LOAD_SMALL_INT_2		12,620,500
_LOAD_ATTR_NONDESCRIPTOR_NO_DICT		12,128,677
_LOAD_ATTR_PROPERTY_FRAME		7,571,327
_END_SEND		7,198,215
_GUARD_CALLABLE_STR_1		6,073,517
_GET_AWAITABLE		5,401,758
_STORE_GLOBAL		5,361,560
_INSERT_NULL		1,694,518
_LOAD_SPECIAL		1,694,518
_GET_YIELD_FROM_ITER		1,685,382
_LOAD_FAST_CHECK		1,198,439
_CHECK_METHOD_VERSION_KW		764,011
_EXPAND_METHOD_KW		764,011
_IMPORT_FROM		742,028
_POP_EXCEPT		30,721
_GUARD_CALLABLE_TUPLE_1		28,780
_LOAD_SUPER_ATTR_ATTR		17,871
_LOAD_GLOBAL		14,720
_UNPACK_EX		13,456
_STORE_ATTR_WITH_HINT		620

Pair counts

Pair counts for top 100 Non-JIT uop pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Unsupported opcodes

unsupported opcodes

Opcode	Base Count	Head Count	Change
CALL_FUNCTION_EX	23,767
SEND	23,001
CALL	1,830

Optimizer errored out with opcode

Optimization stopped after encountering this opcode

Rare events

Counts of rare/unlikely events

Event	Base Count	Head Count	Change
watched dict modification ⓘ A watched dict has been modified	120	286	138.3%
watched globals modification ⓘ A watched globals() dict has been modified	120	286	138.3%
set class ⓘ Setting an object's class, obj.__class__ = ...	22,592	22,592	0.0%
set bases ⓘ Setting the bases of a class, cls.__bases__ = ...	22	22	0.0%
set eval frame func ⓘ Setting the PEP 523 frame eval function _PyInterpreterState_SetFrameEvalFunc()	0	0
builtin dict ⓘ Modifying the builtins, __builtins__.__dict__[var] = ...	0	0
func modification ⓘ Modifying a function, e.g. func.__defaults__ = ..., etc.	313	313	0.0%

Meta stats

Meta statistics

	Base Count	Head Count	Change
Number of data files	2,436	2,436	0.0%

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Stats gathered on: 2025-10-23