go 工具链 (未完待续)

1. package

• go mod init maocaoying.com/learn
• go mod tidy
• go install // install cmd into GOPTAH
• go get // 感觉废弃了，直接go mod tidy

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2. go help cmd

// help cmd detail info

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3. test

• go test [-v] learn_test.go // 指定文件 默认所有testfunc
• go test -v -run TestA select_test.go // TestA func. TestA* 正则匹配的都会执行
• go test -v -bench=. benchmark_test.go
• go test -v -bench=. -benchtime=5s benchmark_test.go
• go test -v -bench=Alloc -benchmem benchmark_test.go 内存分配

  // 重置计时器
  b.ResetTimer()
  // 停止计时器
  b.StopTimer()
  // 开始计时器
  b.StartTimer()

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4. 调试 优化

• delve https://www.maocaoying.com/topic/971
• vet
• 竞态检测器 race

 $ go test -race mypkg
$ go run -race mysrc.go
$ go build -race mycmd
$ go install -race mypkg