concat-v-eval-v-printf.php

<?php

/*//
PS C:\Users\bob\Desktop> php .\test.php
Results For 1,000,000 Iterations
=> Test Concat: 0.294673s
=> Test Eval: 0.258425s
=> Test PrintF: 0.583331s
//*/

class SpeedTest {
/*//
provides meta info and a callable test that we can perform.
//*/

	public $Name = 'Test';
	public $Func = NULL;
	public $Time = 0.0;

	public function
	__construct(String $Name, Callable $Func) {
		$this->Name = $Name;
		$this->Func = $Func;
		return;
	}
};

class Timer {
/*//
perform rapid execution and time measurement for a series of tests.
//*/

	protected
	$Tests = [];
	/*//
	stores the SpeedTests we want to run.
	//*/

	protected
	$Iterations = 0;
	/*//
	@type Int
	how many times we want to perform the tests.
	//*/

	public function
	Add(SpeedTest $Test):
	self {
	/*//
	add a new test to the pool.
	//*/

		$this->Tests[] = $Test;
		return $this;
	}

	public function
	Run(Int $Iterations):
	Void {
	/*//
	run the tests the specified number of times.
	//*/

		$this->Iterations = $Iterations;

		$this->Perform();
		$this->Results();
		return;
	}

	protected function
	Perform():
	Void {
	/*//
	run the things we want to test.
	//*/

		array_walk($this->Tests,function(SpeedTest $Test) {
			$Time = microtime(TRUE);
			$Iter = 0;

			for($Iter = 0; $Iter < $this->Iterations; ++$Iter)
			($Test->Func)($Iter);

			$Test->Time = microtime(TRUE) - $Time;
			return;
		});

		return;
	}

	protected function
	Results():
	Void {
	/*//
	print results of the tests.
	//*/

		printf(
			'Results For %s Iterations%s',
			number_format($this->Iterations),
			PHP_EOL
		);

		array_walk($this->Tests,function(SpeedTest $Test) {
			printf(
				'=> Test %s: %.6fs%s',
				$Test->Name,
				$Test->Time,
				PHP_EOL
			);

			return;
		});

		return;
	}

};

$Timer = (new Timer)
->Add(new SpeedTest('Concat',function(Int $Iter){
	return 'Concat: ' . $Iter . PHP_EOL;
}))
->Add(new SpeedTest('Eval',function(Int $Iter){
	return "Eval: {$Iter}\n";
}))
->Add(new SpeedTest('PrintF',function(Int $Iter){
	return sprintf('PrintF: %d%s',$Iter,PHP_EOL);
}))
->Run(1000000);