updated readme

Author: mainak55512

README.md

@@ -156,6 +156,23 @@ output:
 ]
 ```
 
+## Benchmark
+
+```sh
+❯ hyperfine -N --warmup 10 'rjq --load="test.json" --query="salary < 15000 && score < 2.0 && verified = false"' "jq '.[] | select(.salary<15000 and .score<2.0 and .verified==false)' test.json"
+Benchmark 1: rjq --load="test.json" --query="salary < 15000 && score < 2.0 && verified = false"
+  Time (mean ± σ):     163.0 ms ±   0.9 ms    [User: 125.6 ms, System: 37.1 ms]
+  Range (min … max):   161.9 ms … 164.8 ms    18 runs
+
+Benchmark 2: jq '.[] | select(.salary<15000 and .score<2.0 and .verified==false)' test.json
+  Time (mean ± σ):     332.3 ms ±   2.1 ms    [User: 306.4 ms, System: 25.6 ms]
+  Range (min … max):   328.9 ms … 335.8 ms    10 runs
+
+Summary
+  'rjq --load="test.json" --query="salary < 15000 && score < 2.0 && verified = false"' ran
+    2.04 ± 0.02 times faster than 'jq '.[] | select(.salary<15000 and .score<2.0 and .verified==false)' test.json'
+```
+
 ## Author
 
 👤 **Mainak Bhattacharjee**