「次なる pkg/errors を探して」，「ブログのリアクションから始めるGoのパフォーマンス分析入門」の発表で利用した、benchmark用コードです
go test -bench .➜ benchmark_pkg_errors_alternatives git:(main) go test -bench .
goos: darwin
goarch: arm64
pkg: example
BenchmarkErrors/errors-stack-10-10 37280496 33.06 ns/op 16 B/op 1 allocs/op
BenchmarkErrors/errors-stack-100-10 1606914 745.9 ns/op 16 B/op 1 allocs/op
BenchmarkErrors/errors-stack-1000-10 167526 7195 ns/op 16 B/op 1 allocs/op
BenchmarkErrors/pkg/errors-stack-10-10 1256511 916.9 ns/op 304 B/op 3 allocs/op
BenchmarkErrors/pkg/errors-stack-100-10 641211 1816 ns/op 304 B/op 3 allocs/op
BenchmarkErrors/pkg/errors-stack-1000-10 145304 8249 ns/op 304 B/op 3 allocs/op
BenchmarkErrors/cockroachdb/errors-stack-10-10 874520 1338 ns/op 416 B/op 7 allocs/op
BenchmarkErrors/cockroachdb/errors-stack-100-10 537822 2210 ns/op 416 B/op 7 allocs/op
BenchmarkErrors/cockroachdb/errors-stack-1000-10 138954 8640 ns/op 416 B/op 7 allocs/op
BenchmarkErrors/goark/errs-stack-10-10 1771054 680.5 ns/op 648 B/op 7 allocs/op
BenchmarkErrors/goark/errs-stack-100-10 851818 1399 ns/op 648 B/op 7 allocs/op
BenchmarkErrors/goark/errs-stack-1000-10 152260 7885 ns/op 648 B/op 7 allocs/op
BenchmarkStackFormatting/errors-%s-stack-10-10 16073302 74.19 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%v-stack-10-10 16066155 75.49 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%+v-stack-10-10 15782058 76.25 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%s-stack-30-10 16099944 74.91 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%v-stack-30-10 16081317 75.46 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%+v-stack-30-10 15475874 76.05 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%s-stack-60-10 16071885 74.00 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%v-stack-60-10 15950331 74.89 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/errors-%+v-stack-60-10 15637929 76.25 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%s-stack-10-10 15922783 74.14 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%v-stack-10-10 15663325 75.78 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%+v-stack-10-10 186388 6378 ns/op 1689 B/op 20 allocs/op
BenchmarkStackFormatting/pkg/errors-%s-stack-30-10 15865809 74.45 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%v-stack-30-10 15776956 75.97 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%+v-stack-30-10 93548 12825 ns/op 3724 B/op 34 allocs/op
BenchmarkStackFormatting/pkg/errors-%s-stack-60-10 16115764 74.51 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%v-stack-60-10 15763244 75.55 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/pkg/errors-%+v-stack-60-10 93242 12849 ns/op 3716 B/op 33 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%s-stack-10-10 1284194 934.8 ns/op 994 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%v-stack-10-10 1278844 938.5 ns/op 994 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%+v-stack-10-10 142902 8307 ns/op 8161 B/op 26 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%s-stack-30-10 1244330 955.0 ns/op 1124 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%v-stack-30-10 1246329 962.1 ns/op 1124 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%+v-stack-30-10 76638 14675 ns/op 17220 B/op 23 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%s-stack-60-10 1249936 951.6 ns/op 1124 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%v-stack-60-10 1245757 961.4 ns/op 1123 B/op 16 allocs/op
BenchmarkStackFormatting/cockroachdb/errors-%+v-stack-60-10 80919 14867 ns/op 17222 B/op 22 allocs/op
BenchmarkStackFormatting/goark/errs-%s-stack-10-10 15291566 78.53 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%v-stack-10-10 14251922 82.78 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%+v-stack-10-10 621520 1887 ns/op 1401 B/op 33 allocs/op
BenchmarkStackFormatting/goark/errs-%s-stack-30-10 15319588 78.71 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%v-stack-30-10 14493854 82.72 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%+v-stack-30-10 615178 1884 ns/op 1401 B/op 33 allocs/op
BenchmarkStackFormatting/goark/errs-%s-stack-60-10 15143666 78.09 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%v-stack-60-10 14326141 82.58 ns/op 8 B/op 1 allocs/op
BenchmarkStackFormatting/goark/errs-%+v-stack-60-10 613336 1896 ns/op 1401 B/op 33 allocs/op
PASS
ok example 69.441s
# profile
go test -bench XXX -cpuprofile=c.out
# view on browser profile
go tool pprof -http :8080 -timeout 1 c.out