$ go build -o ./rl main.go

$ ./rl -cpuprofile=rl.prof
 u:/other/01E6E2FVX6D1VDFZRVMJ2GJVHQ/endpoint/100
 h: 0x656220
 p: [{Key:id Value:01E6E2FVX6D1VDFZRVMJ2GJVHQ} {Key:nid Value:100}]
ok: false
id: 01E6E2FVX6D1VDFZRVMJ2GJVHQ and nid: 100

 u:/other/01E6E2FVX6D1VDFZRVMJGG5SPA/endpoint/100
 h: 0x656220
 p: [{Key:id Value:01E6E2FVX6D1VDFZRVMJGG5SPA} {Key:nid Value:100}]
ok: false
id: 01E6E2FVX6D1VDFZRVMJGG5SPA and nid: 100

 u:/other/01E6E2FVX7AYGETF031YY85B1J/endpoint/100
 h: 0x656220
 p: [{Key:id Value:01E6E2FVX7AYGETF031YY85B1J} {Key:nid Value:100}]
ok: false
id: 01E6E2FVX7AYGETF031YY85B1J and nid: 100
...

$ go tool pprof rl rl.prof
File: rl
Type: cpu
Time: Apr 21, 2020 at 10:51am (WEST)
Duration: 301.47ms, Total samples = 130ms (43.12%)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) top10
Showing nodes accounting for 120ms, 92.31% of 130ms total
Showing top 10 nodes out of 50
      flat  flat%   sum%        cum   cum%
      20ms 15.38% 15.38%       20ms 15.38%  runtime.mallocgc
      20ms 15.38% 30.77%       20ms 15.38%  syscall.Syscall
      10ms  7.69% 38.46%       20ms 15.38%  fmt.(*pp).printValue
      10ms  7.69% 46.15%       20ms 15.38%  net/http.DetectContentType
      10ms  7.69% 53.85%       10ms  7.69%  net/http.textSig.match
      10ms  7.69% 61.54%       30ms 23.08%  os.(*File).write
      10ms  7.69% 69.23%       10ms  7.69%  runtime.futex
      10ms  7.69% 76.92%       10ms  7.69%  runtime.mapassign_faststr
      10ms  7.69% 84.62%       20ms 15.38%  runtime.newobject
      10ms  7.69% 92.31%       10ms  7.69%  runtime.sysUnused
(pprof) web
...