golang_benchmark:golang性能测试

golang性能对比 测试平台：M1 Macbook Pro golang版本：1.16.2 双向拼接 cd string_join go golang_benchmark -bench=. -benchmem -run=none 结果 goos: darwin goarch: arm64 pkg: test/string_join BenchmarkForPlusShortText-8 1000000000 0.3198 ns/op 0 B/op 0 allocs/op BenchmarkForFmtText-8 6477994 184.7 ns/op 48 B/op 1 allocs/op B