Benchmark sync.Map vs regular RWMutex map

delete_bench.go

func BenchmarkDeleteRegular(b *testing.B) {
	nums := nrand(b.N)
	rm := NewRegularIntMap()
	for _, v := range nums {
		rm.Store(v, v)
	}

	b.ResetTimer()
	for _, v := range nums {
		rm.Delete(v)
	}
}

func BenchmarkDeleteSync(b *testing.B) {
	nums := nrand(b.N)
	var sm sync.Map
	for _, v := range nums {
		sm.Store(v, v)
	}

	b.ResetTimer()
	for _, v := range nums {
		sm.Delete(v)
	}
}

/*
BenchmarkDeleteRegular-32               	10000000	       238 ns/op
BenchmarkDeleteSync-32                  	 5000000	       393 ns/op
*/