写了一个类用来测试目标函数的执行时间。以下是类的定义代码:
/**
* class EfficiencyTester
* 效率测试器,测试函数的运行时间
* @version 1.0 2013.04.13
* @author Kross
*/
class EfficiencyTester {
/**
* var $testTimes
* 测试的次数
*/
private $testTimes = 1000;
/**
* function getTime()
* 根据时间模式,获取时间戳
* @param $timeModel 时间模式,默认:微秒
* @return int 时间戳
*/
private function getTime($timeModel = 'MS') {
if ($timeModel == 'MS') {
return microtime();
} else if ($timeModel == 'S') {
return time();
} else {
return microtime();
}
}
/**
* function testOnce()
* 测试目标函数一次,返回运行时间
* @param $functionName 目标函数名
* @param $timeModel 时间模式,默认:微秒
* @return double 目标函数运行一次的时间(很随机)
*/
public function testOnce($functionName, $timeModel = 'MS') {
$startMicroTime = $this->getTime($timeModel);
$functionName();
$endMicroTime = $this->getTime($timeModel);
$costMicroTime = $endMicroTime - $startMicroTime;
return $costMicroTime;
}
/**
* function test()
* 测试目标函数多次,返回运行时间(平均值)
* @param $functionName 目标函数名
* @param $timeModel 时间模式,默认:微秒
* @return double 目标函数运行的时间
*/
public function test($functionName, $timeModel = 'MS') {
$totalMicroTimes = 0;
for ($i = 1; $i testTimes; $i++) {
$totalMicroTimes += $this->testOnce($functionName);
}
return $totalMicroTimes / $this->testTimes;
}
}
?>
以下是类的测试代码:
require_once('../class/EfficiencyTester.class.php');
$e = new EfficiencyTester();
echo $e->test('rand');
?>
一开始我是直接使用 microtime() 获取时间的,后来考虑到如果想获得单位是秒的运行时间,这样写就不够多态了,然后我就写了一个getTime() 的函数来获取不同单位的时间戳,不过这样,貌似目标函数的运行时间变长了,可能是因为 getTime() 函数中的判断占用了一部分时间。

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
