为了强制执行max_execution_time限制,PHP必须跟踪特定脚本所使用的CPU时间。
是否有一种方法可以在脚本中访问它?我希望在测试中包含一些关于实际PHP中消耗了多少CPU的日志记录(当脚本等待数据库时,时间不会增加)。
我用的是Linux机顶盒。
为了强制执行max_execution_time限制,PHP必须跟踪特定脚本所使用的CPU时间。
是否有一种方法可以在脚本中访问它?我希望在测试中包含一些关于实际PHP中消耗了多少CPU的日志记录(当脚本等待数据库时,时间不会增加)。
我用的是Linux机顶盒。
当前回答
如果你需要的是挂钟时间,而不是CPU执行时间,那么计算起来很简单:
//place this before any script you want to calculate time
$time_start = microtime(true);
//sample script
for($i=0; $i<1000; $i++){
//do anything
}
$time_end = microtime(true);
//dividing with 60 will give the execution time in minutes otherwise seconds
$execution_time = ($time_end - $time_start)/60;
//execution time of the script
echo '<b>Total Execution Time:</b> '.$execution_time.' Mins';
// if you get weird results, use number_format((float) $execution_time, 10)
注意,这将包括PHP等待外部资源(如磁盘或数据库)的时间,而max_execution_time没有使用这个时间。
其他回答
要显示分钟和秒,您可以使用:
$startTime = microtime(true);
$endTime = microtime(true);
$diff = round($endTime - $startTime);
$minutes = floor($diff / 60); //only minutes
$seconds = $diff % 60;//remaining seconds, using modulo operator
echo "script execution time: minutes:$minutes, seconds:$seconds"; //value in seconds
我想说的是:
如果测量目标是不同php文件中的两点A和B,会发生什么? 如果我们需要不同的度量,比如基于时间、代码执行持续时间、外部资源访问持续时间,该怎么办? 如果我们需要将我们的度量组织成不同的类别,每个类别都有不同的起点,那该怎么办呢?
正如你怀疑的那样,我们需要一些全局变量来被类对象或静态方法访问:我选择第二种方法,它是:
namespace g3;
class Utils {
public function __construct() {}
public static $UtilsDtStart = [];
public static $UtilsDtStats = [];
public static function dt() {
global $UtilsDtStart, $UtilsDtStats;
$obj = new \stdClass();
$obj->start = function(int $ndx = 0) use (&$UtilsDtStart) {
$UtilsDtStart[$ndx] = \microtime(true) * 1000;
};
$obj->codeStart = function(int $ndx = 0) use (&$UtilsDtStart) {
$use = \getrusage();
$UtilsDtStart[$ndx] = ($use["ru_utime.tv_sec"] * 1000) + ($use["ru_utime.tv_usec"] / 1000);
};
$obj->resourceStart = function(int $ndx = 0) use (&$UtilsDtStart) {
$use = \getrusage();
$UtilsDtStart[$ndx] = $use["ru_stime.tv_usec"] / 1000;
};
$obj->end = function(int $ndx = 0) use (&$UtilsDtStart, &$UtilsDtStats) {
$t = @$UtilsDtStart[$ndx];
if($t === null)
return false;
$end = \microtime(true) * 1000;
$dt = $end - $t;
$UtilsDtStats[$ndx][] = $dt;
return $dt;
};
$obj->codeEnd = function(int $ndx = 0) use (&$UtilsDtStart, &$UtilsDtStats) {
$t = @$UtilsDtStart[$ndx];
if($t === null)
return false;
$use = \getrusage();
$dt = ($use["ru_utime.tv_sec"] * 1000) + ($use["ru_utime.tv_usec"] / 1000) - $t;
$UtilsDtStats[$ndx][] = $dt;
return $dt;
};
$obj->resourceEnd = function(int $ndx = 0) use (&$UtilsDtStart, &$UtilsDtStats) {
$t = @$UtilsDtStart[$ndx];
if($t === null)
return false;
$use = \getrusage();
$dt = ($use["ru_stime.tv_usec"] / 1000) - $t;
$UtilsDtStats[$ndx][] = $dt;
return $dt;
};
$obj->stats = function(int $ndx = 0) use (&$UtilsDtStats) {
$s = @$UtilsDtStats[$ndx];
if($s !== null)
$s = \array_slice($s, 0);
else
$s = false;
return $s;
};
$obj->statsLength = function() use (&$UtilsDtStats) {
return \count($UtilsDtStats);
};
return $obj;
}
}
现在你所要做的就是调用属于特定类别的方法,索引表示它的唯一组:
File A
------
\call_user_func_array(\g3\Utils::dt()->start, [0]); // point A
...
File B
------
$dt = \call_user_func_array(\g3\Utils::dt()->end, [0]); // point B
值$dt包含点A和点B之间壁钟持续时间的毫秒数。
估算php代码运行所花费的时间:
File A
------
\call_user_func_array(\g3\Utils::dt()->codeStart, [1]); // point A
...
File B
------
$dt = \call_user_func_array(\g3\Utils::dt()->codeEnd, [1]); // point B
注意我们是如何改变传递给方法的索引的。
代码基于从函数返回对象/函数时发生的闭包效应(参见示例中重复的\g3\Utils::dt())。
我用php单元进行了测试,在同一测试文件中的不同测试方法之间,到目前为止它表现良好!
希望这能帮助到别人!
进一步扩展Hamid的回答,我写了一个可以重复启动和停止的helper类(用于在循环中进行分析)。
class ExecutionTime
{
private $startTime;
private $endTime;
private $compTime = 0;
private $sysTime = 0;
public function Start(){
$this->startTime = getrusage();
}
public function End(){
$this->endTime = getrusage();
$this->compTime += $this->runTime($this->endTime, $this->startTime, "utime");
$this->systemTime += $this->runTime($this->endTime, $this->startTime, "stime");
}
private function runTime($ru, $rus, $index) {
return ($ru["ru_$index.tv_sec"]*1000 + intval($ru["ru_$index.tv_usec"]/1000))
- ($rus["ru_$index.tv_sec"]*1000 + intval($rus["ru_$index.tv_usec"]/1000));
}
public function __toString(){
return "This process used " . $this->compTime . " ms for its computations\n" .
"It spent " . $this->systemTime . " ms in system calls\n";
}
}
developerfusion.com的Gringod给出了一个很好的答案:
<!-- put this at the top of the page -->
<?php
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$starttime = $mtime;
;?>
<!-- put other code and html in here -->
<!-- put this code at the bottom of the page -->
<?php
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$endtime = $mtime;
$totaltime = ($endtime - $starttime);
echo "This page was created in ".$totaltime." seconds";
;?>
从(http://www.developerfusion.com/code/2058/determine-execution-time-in-php/)
这里列出了几种方法。但每个人都有自己的优点和缺点。而且(在我看来)所有较长的答案的可读性都很糟糕。
所以我决定把这些都放在一个答案中,这是容易使用和阅读的。
使用
$start = get_timers();
for( $i = 0; $i < 100000; $i++ ){
// Code to check
}
$end = get_timers();
display_timer_statistics( $start, $end );
函数定义
function display_timer_statistics( $start_timers, $end_timers ){
// Settings
$key_width = '100px';
$decimals = 4;
$decimals_wallclock = $decimals;
$decimals_request_time_float = $decimals;
// Variables
$start_resource_usage_timer = $start_timers[0];
$start_wallclock = $start_timers[1];
$end_resource_usage_timer = $end_timers[0];
$end_wallclock = $end_timers[1];
// # User time
// Add seconds and microseconds for the start/end, and subtract from another
$end_user_time_seconds = $end_resource_usage_timer["ru_utime.tv_sec"]*1000;
$end_user_time_microseconds = intval($end_resource_usage_timer["ru_utime.tv_usec"]/1000);
$start_user_time_seconds = $start_resource_usage_timer["ru_utime.tv_sec"]*1000;
$start_user_time_microseconds = intval($start_resource_usage_timer["ru_utime.tv_usec"]/1000);
$total_user_time = ($end_user_time_seconds + $end_user_time_microseconds) - ($start_user_time_seconds + $start_user_time_microseconds);
// # System time
// Add seconds and microseconds for the start/end, and subtract from another
$end_system_time_seconds = $end_resource_usage_timer["ru_stime.tv_sec"]*1000;
$end_system_time_microseconds = intval($end_resource_usage_timer["ru_stime.tv_usec"]/1000);
$start_system_time_seconds = $start_resource_usage_timer["ru_stime.tv_sec"]*1000;
$start_system_time_microseconds = intval($start_resource_usage_timer["ru_stime.tv_usec"]/1000);
$total_system_time = ($end_system_time_seconds + $end_system_time_microseconds) - ($start_system_time_seconds + $start_system_time_microseconds);
// Wallclock
$total_wallclock_time = number_format( ( $end_wallclock - $start_wallclock), $decimals_wallclock );
// Server request_time_float
$request_time_float = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
$request_time_float = number_format( $request_time_float, $decimals_request_time_float );
// Print
$span_start = "<span style='width: $key_width; display: inline-block;'>";
$span_end = "</span>";
$output = "# RUNTIME AND TIMERS " . PHP_EOL ;
$output .= PHP_EOL;
$output .= $span_start . $total_user_time . $span_end . " User time (utime)" . PHP_EOL;
$output .= $span_start . $total_system_time . $span_end . " System time (stime)" . PHP_EOL;
$output .= PHP_EOL;
$output .= $span_start . $total_wallclock_time . $span_end . " Wallclock" . PHP_EOL;
$output .= PHP_EOL;
$output .= $span_start . $request_time_float . $span_end . " REQUEST_TIME_FLOAT" . PHP_EOL . PHP_EOL . PHP_EOL;
echo nl2br( $output );
}
function get_timers(){
return [ getrusage(), microtime( true ) ];
}
术语表
这些都是从PHP文档中获取的
挂钟=花了多长时间 ru =资源使用率 utime =用户使用的时间 stime =使用的系统时间 tv_sec =秒。 tv_usec =以微秒计。 电视= ??不知道