Old:
 go test -benchmem -run=^$ -bench ^BenchmarkHashJoinExec$ github.com/pingcap/tidb/pkg/executor
goos: linux
goarch: amd64
pkg: github.com/pingcap/tidb/pkg/executor
cpu: 13th Gen Intel(R) Core(TM) i9-13900KF
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0_1],_disk:false)-32                   2         625585277 ns/op        2428636920 B/op   512892 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                    19          64306968 ns/op        278193261 B/op    112877 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0],_disk:true)-32                      2         510499472 ns/op        3491117756 B/op  2213412 allocs/op
BenchmarkHashJoinExec/(rows:5,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                             26020             48058 ns/op           87853 B/op        934 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0_1],_disk:false)-32                         79          16758415 ns/op        15902526 B/op     512736 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                           92          15112195 ns/op        12524965 B/op     112666 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)],_concurency:4,_joinKeyIdx:_[0],_disk:true)-32                                    9         123780841 ns/op        894195201 B/op   1714292 allocs/op


New:
go test -benchmem -run=^$ -bench ^BenchmarkHashJoinExec$ github.com/pingcap/tidb/pkg/executor                      
goos: linux
goarch: amd64
pkg: github.com/pingcap/tidb/pkg/executor
cpu: 13th Gen Intel(R) Core(TM) i9-13900KF
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0_1],_disk:false)-32                   2         627044000 ns/op        2428678160 B/op   512971 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                    18          63483060 ns/op        278192079 B/op    112888 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_var_string(5)],_concurency:4,_joinKeyIdx:_[0],_disk:true)-32                      2         502814122 ns/op        3639970448 B/op  1216829 allocs/op
BenchmarkHashJoinExec/(rows:5,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                             28047             48197 ns/op           87847 B/op        934 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0_1],_disk:false)-32                         70          16853512 ns/op        15902144 B/op     512739 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)_double],_concurency:4,_joinKeyIdx:_[0],_disk:false)-32                           82          14872368 ns/op        12524746 B/op     112660 allocs/op
BenchmarkHashJoinExec/(rows:100000,_cols:[bigint(20)],_concurency:4,_joinKeyIdx:_[0],_disk:true)-32                                   22          53258487 ns/op        40282174 B/op    1113179 allocs/op

None