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                            ~~~
package main

import (
    "fmt"
    "runtime"
    "sync"
)

func getGoroutineMemConsume() {
    var c chan int
    var wg sync.WaitGroup
    const goroutineNum = 1e4 // 1 * 10^4

    memConsumed := func() uint64 {
        runtime.GC() //GC，排除對象影響
        var memStat runtime.MemStats
        runtime.ReadMemStats(&memStat)
        return memStat.Sys
    }

    noop := func() {
        wg.Done()
        <-c //防止goroutine退出，內存被釋放
    }

    wg.Add(goroutineNum)
    before := memConsumed() //獲取創建goroutine前內存
    for i := 0; i < goroutineNum; i++ {
        go noop()
    }
    wg.Wait()
    after := memConsumed() //獲取創建goroutine后內存

    fmt.Printf("%.3f KB\n", float64(after-before)/goroutineNum/1000)
}
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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