HRTime
PHP Manual

The HRTime\PerformanceCounter class

(PECL hrtime >= 0.4.3)

简介

类摘要

HRTime\PerformanceCounter {
/* 方法 */
public static int getFrequency ( void )
public static int getTicks ( void )
public static int getTicksSince ( int $start )
}

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HRTime
PHP Manual