boolset vs emptystructset

results.txt

goos: darwin
goarch: amd64
pkg: ajm188.scratch/setsbench
cpu: Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz
BenchmarkSets/bool_set-8         	  366444	      3804 ns/op	    2620 B/op	       6 allocs/op
BenchmarkSets/emptystruct_set-8  	  303908	      3472 ns/op	    2363 B/op	       6 allocs/op
PASS
coverage: 0.0% of statements
ok  	ajm188.scratch/setsbench	2.867s

sets_bench_test.go

package main

import "testing"

var words = []string{
	"hello",
	"world",
	"this",
	"is",
	"a",
	"test",
	"some",
	"of",
	"the",
	"words",
	"will",
	"be",
	"repeated",
	"during",
	"this",
	"test",
	"but",
	"not",
	"all",
	"of",
	"the",
	"words",
	"to",
	"cover",
	"insertion",
	"cases",
	"and",
	"also",
	"to",
	"cover",
	"some",
	"cases",
	"where",
	"we",
	"update",
	"the",
	"value",
	"of",
	"a",
	"key",
	"already",
	"in",
	"the",
	"set",
}

var (
	boolset   map[string]bool
	structset map[string]struct{}
)

func BenchmarkSets(b *testing.B) {
	b.Run("bool set", func(b *testing.B) {
		for i := 0; i < b.N; i++ {
			boolset = map[string]bool{}
			for _, word := range words {
				boolset[word] = true
			}
		}
	})

	b.Run("emptystruct set", func(b *testing.B) {
		for i := 0; i < b.N; i++ {
			structset = map[string]struct{}{}
			for _, word := range words {
				structset[word] = struct{}{}
			}
		}
	})
}