【PHP】シンプルなベンチマーククラス

benchmark.class.php

<?php
namespace Acme;

class Benchmark
{

	/**
	 * markers
	 * 
	 * @var array 
	 */
	private $marker = [];

	/**
	 * set marking
	 * 
	 * @param string|integer $name
	 */
	public function mark($name)
	{
		$this->marker[$name] = microtime(true);

	}

	/**
	 * seek marking
	 * 
	 * @param string|integer $name
	 * @return float
	 * @throws \OutOfBoundsException
	 */
	public function seek($name)
	{
		if (!isset($this->marker[$name]))
		{
			throw new \OutOfBoundsException("invalid marker [$name]");
		}

		return $this->marker[$name];

	}

	/**
	 * get elapsed time
	 * 
	 * @param string|integer $start
	 * @param string|integer $end
	 * @param integer $decimals
	 * @return float
	 * @throws \OutOfBoundsException
	 */
	public function getTime($start = 'start', $end = 'end', $decimals = 4)
	{
		$start_time = $this->seek($start);
		$end_time   = $this->seek($end);
		
		if ($end_time - $start_time < 0)
		{
			throw new \OutOfBoundsException("invalid marker [$start]");
		}

		return number_format($end_time - $start_time, $decimals);

	}

}