Continuing from the yesterday’s point, we can see in the source code view that majority of the resources spent on the indexed search is on the map lookup, similar with the top functions view.
go test -run '^$' \
-bench '^BenchmarkCountAllowedEvents$/^implementation=indexed$' \
-benchtime=5s \
-cpuprofile=/tmp/codec01-allowlist-indexed-cpu.pprof
goos: linux
goarch: arm64
pkg: codec01
BenchmarkCountAllowedEvents/implementation=indexed-12 512224 11657 ns/op 0 B/op 0 allocs/op
PASS
ok codec01 5.977sgo tool pprof \
-list=codec01.CountAllowedEventsIndexed \
/tmp/codec01-allowlist-indexed-cpu.pprof
Total: 5.97s
ROUTINE ======================== codec01.CountAllowedEventsIndexed
740ms 5.96s (flat, cum) 99.83% of Total
. . 35:func CountAllowedEventsIndexed(eventNames []string, allowed map[string]struct{}) int {
. . 36: count := 0
460ms 460ms 37: for _, name := range eventNames {
280ms 5.50s 38: if _, ok := allowed[name]; ok {
. . 39: count++
. . 40: }
. . 41: }
. . 42: return count
. . 43:}