<?php

function test_encrypt($fun, $max) {

    $begin = microtime(TRUE);

    $pwdpre = time();

    for ($i = 1; $i <= $max; $i++) {

        $fun($pwdpre . $i);

    }

    echo $fun . ' => ' . number_format((microtime(TRUE) - $begin) * 1000, 2) . ' ms' . "\r\n";

}

test_encrypt('crc32', 1000 * 1000); //165.52ms

test_encrypt('md5', 1000 * 1000); //390.99ms

test_encrypt('sha1', 1000 * 1000); //488.63.ms

package main

import (

    "crypto/md5"

    "crypto/sha1"

    "encoding/hex"

    "fmt"

    "hash/crc32"

    "strconv"

    "time"

)

func main() {

    test_encrypt("CRC32", 1000*1000) // 162.1024 ms

    test_encrypt("MD5", 1000*1000)   // 525.0696 ms

    test_encrypt("SHA1", 1000*1000)  // 586.758 ms

}

func test_encrypt(fun string, max int) {

    pwdpre := strconv.FormatInt(time.Now().Unix(), 10)

    begin := time.Now().UnixNano()

    for i := 1; i <= max; i++ {

        switch fun {

        case "CRC32":

            CRC32(pwdpre + strconv.Itoa(i))

        case "MD5":

            MD5(pwdpre + strconv.Itoa(i))

        case "SHA1":

            SHA1(pwdpre + strconv.Itoa(i))

        }

    }

    end := time.Now().UnixNano()

    fmt.Println(fun, "=>", float64(end-begin)/1e6, "ms")

}

func MD5(str string) string {

    // 取得16进制文本MD5

    h := md5.New()

    h.Write([]byte(str))

    return hex.EncodeToString(h.Sum(nil))

}

func SHA1(str string) string {

    // 取得16进制文本SHA1

    c := sha1.New()

    c.Write([]byte(str))

    return hex.EncodeToString(c.Sum(nil))

}

func CRC32(str string) uint32 {

    // 取得无符号32位整型CRC32

    return crc32.ChecksumIEEE([]byte(str))

}