https://segmentfault.com/a/1190000019222661
https://segmentfault.com/a/1190000000501635
https://blog.csdn.net/chushoufengli/article/details/103763815
https://zhuanlan.zhihu.com/p/71529062
pprof
go tool pprof http://
go-torch http://
go-torch -t 1 http://9.134.239.95:8081/debug/pprof/profile
go-torch –help
go test -bench=. -memprofile=mem.prof