debug trace

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package main

import (
	"fmt"
	"os"
	"runtime/trace"
)

func main() {
	f, err := os.Create("trace.out")

	if err != nil {
		panic(err)
	}

	defer f.Close()
	err = trace.Start(f)
	if err != nil {
		panic(err)
	}

	fmt.Println("hello world")
	trace.Stop()

}

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 go tool trace .\trace.out