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Benchmarks test to know how much memory can be saved by using struct{} instead of booleans.
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| package main | |
| import ( | |
| "fmt" | |
| "testing" | |
| ) | |
| func benchmarkBooleans(b *testing.B) { | |
| s := make(map[int]bool) | |
| for i := 0; i < 1000*b.N; i++ { | |
| s[2*i] = true | |
| } | |
| } | |
| func benchmarkStructs(b *testing.B) { | |
| s := make(map[int]struct{}) | |
| for i := 0; i < 1000*b.N; i++ { | |
| s[2*i] = struct{}{} | |
| } | |
| } | |
| func main() { | |
| boolRes := testing.Benchmark(benchmarkBooleans) | |
| fmt.Println("booleans:", boolRes.MemString()) | |
| structRes := testing.Benchmark(benchmarkStructs) | |
| fmt.Println("structs{}:", structRes.MemString()) | |
| fmt.Println("ratio:", float32(boolRes.AllocedBytesPerOp()) / float32(structRes.AllocedBytesPerOp())) | |
| } |
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