okzk

## bench_test.go
package main

import (
	"sync"
	"testing"
	"time"
)

const concurrency = 4

## main.go
package main

import (
	"context"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"runtime"
	"sync"

## main.go
package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"runtime"
	"sync"
)
	package main

	import (
	"sync"
	"testing"
	"time"
	)

	const concurrency = 4
	package main

	import (
	"context"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"runtime"
	"sync"