Linux 下的 time 命令可以獲取命令執行時間，Windows 下并沒有類似的命令，我們可以自力更生寫一個批處理，命名為time.bat。
[plain]
@echo off
set /a StartMS=%time:~3,1%*60000 + %time:~4,1%*6000 + %time:~6,1%*1000 + %time:~7,1%*100 + %time:~9,1%*10 + %time:~10,1%
%1 %2 %3 %4 %5 %6
set /a EndMS =%time:~3,1%*60000 + %time:~4,1%*6000 + %time:~6,1%*1000 + %time:~7,1%*100 + %time:~9,1%*10 + %time:~10,1%
set /a realtime = %EndMS%-%StartMS%
echo %realtime%ms
這是執行的例子，測試PHP 5.3、5.4、5.5 不同版本的運行速度：
[plain]
F:/BAK>time.bat F:/BAK/php-5.3.27/php.exe primes.benchmark.php
PHP version 5.3.27
Found 148933 prime numbers.
867ms
F:/BAK>time.bat F:/BAK/php-5.4.19/php.exe primes.benchmark.php
PHP version 5.4.19
Found 148933 prime numbers.
759ms
F:/BAK>time.bat F:/BAK/php-5.5.4/php.exe primes.benchmark.php
PHP version 5.5.4
Found 148933 prime numbers.
733ms
