Introdução
    PHP Manual
    PHP Manual»HRTime»HRTime\StopWatch

    A classe HRTime\StopWatch

    (PECL hrtime >= 0.4.3)

    class HRTime\StopWatch extends HRTime\PerformanceCounter {
    /* Métodos */
    public function getElapsedTicks(): int
    public function getElapsedTime(int $unit = ?): float
    public function getLastElapsedTicks(): int
    public function getLastElapsedTime(int $unit = ?): float
    public function isRunning(): bool
    public function start(): void
    public function stop(): void
    /* Métodos herdados */
    public static function HRTime\PerformanceCounter::getFrequency(): int
    public static function HRTime\PerformanceCounter::getTicks(): int
    public static function HRTime\PerformanceCounter::getTicksSince(int $start): int
    }

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