如何查找我的代码执行时间?
我正在使用以下代码段。
我对此不满意?
list ($msec, $sec) = explode(' ', microtime());
$microtime = (float)$msec + (float)$sec;
答案 0 :(得分:21)
我为此创建了这个简单的类:
class timer
{
private $start_time = NULL;
private $end_time = NULL;
private function getmicrotime()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
function start()
{
$this->start_time = $this->getmicrotime();
}
function stop()
{
$this->end_time = $this->getmicrotime();
}
function result()
{
if (is_null($this->start_time))
{
exit('Timer: start method not called !');
return false;
}
else if (is_null($this->end_time))
{
exit('Timer: stop method not called !');
return false;
}
return round(($this->end_time - $this->start_time), 4);
}
# an alias of result function
function time()
{
$this->result();
}
}
对于时间脚本,您可以使用它:
$timer = new timer();
$timer->start();
// your code now
$timer->stop();
// show result now
echo $timer->result();
答案 1 :(得分:9)
我正在使用以下课程确定已过去的时间:
class StopWatch {
private static $total;
public static function start() {
self::$total = microtime(true);
}
public static function elapsed() {
return microtime(true) - self::$total;
}
}
您只需要在开始时StopWatch::start
和StopWatch::elapsed
,只要您想知道从一开始就经过了多长时间。
答案 2 :(得分:5)
您可以使用parameter of microtime:
$microtime = microtime(true);
答案 3 :(得分:3)
如果要对脚本进行概要分析,请使用XDebug + {K,Win} Cachegrind,这些是免费工具,可提供代码执行的可视化映射。
答案 4 :(得分:2)
如果您想要实际的处理器时序:
$rUsage = getrusage();
echo 'User time = '.sprintf('%.4f',($rUsage['ru_utime.tv_sec'] * 1e6 + $rUsage['ru_utime.tv_usec']) / 1e6).' seconds';
echo 'system time = '.sprintf('%.4f',($rUsage['ru_stime.tv_sec'] * 1e6 + $rUsage['ru_stime.tv_usec']) / 1e6).' seconds';
答案 5 :(得分:1)
在LINUX中:
time php -r "echo 'hello';"
输出:
您好
真实0m0.095s
用户0m0.033s
sys 0m0.055s
time php hello.php
输出:
您好
真正的0m0.073s
用户0m0.025s
sys 0m0.047s
答案 6 :(得分:0)
如果运行Unix,请查看time command:
答案 7 :(得分:0)
感谢您分享您的信息。
下面的一个也很接近我的解决方案。
function microtime_float() {
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();
SOURCE CODE
$time_end = microtime_float();
$time = round($time_end - $time_start, 4);
echo "Last uncached content render took $time seconds";
答案 8 :(得分:0)
<?php
// Randomize sleeping time
usleep(mt_rand(100, 10000));
// As of PHP 5.4.0, REQUEST_TIME_FLOAT is available in the $_SERVER superglobal array.
// It contains the timestamp of the start of the request with microsecond precision.
$time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
echo "Did nothing in $time seconds\n";
?>