Get elapsed time for all intervals

# HRTime\StopWatch::getElapsedTime

(PECL hrtime >= 0.4.3)

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

### 説明

public HRTime\StopWatch::getElapsedTime ([ int `$unit` ] ) : float

Get elapsed time for all the previously closed intervals.

### パラメータ

`unit`

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

### 返り値

Returns float indicating elapsed time.