# HRTime\StopWatch::getElapsedTime

(PECL hrtime >= 0.4.3)

HRTime\StopWatch::getElapsedTime — Get elapsed time for all intervals

### 说明

public HRTime\StopWatch::getElapsedTime(int `$unit` = ?): float

Get elapsed time for all the previously closed intervals.

### 参数

`unit`
  Time unit represented by a HRTime\Unit constant. Default is HRTime\Unit::SECOND.

### 返回值

Returns float indicating elapsed time.

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