callable-vs-template-loop.php

<?php

/*//
this comparing two methods of writing templates. i was indecisive about which
style i should use when using datastore capable objects in templates. to decide
which way i like i decided to let the numbers speak for themselves.

so we have this datastore and to dump it into an html template takes 3 lines of
code regardless of which way i do it.

	<?php $Datastore->Each(function($Item){ ?>
	render html
	<?php }); ?>

vs

	<?php foreach($Datastore as $Item): ?>
	render html
	<?php endforeach; ?>

i know damn well that the loop version will be faster, but i wanted to know if
it will be faster enough that it should persuade me from using the Each method.
i was already on the fence about each because breaking out of PHP in the middle
of a function felt wrong. the result of this test will help me decide on the
preferred pattern in use here.
//*/

/*//
$ php tests/b1.php
Each: 0.73465299606323s, Loop: 0.12960004806519s
Difference: Callable is 0.60505294799805s Slower

$ php --version
PHP 7.0.0-2+deb.sury.org~trusty+1 (cli) ( NTS )

Conclusion: Yeah, we'll use the loop method instead.
//*/

class Whatever {

	public $Items;

	public function
	__Construct() {

		for($Count = 0; $Count < 10000000; $Count++)
		$this->Items[] = $Count;

		return;
	}

	public function
	Each($Function) {

		foreach($this->Items as $Item)
		$Function($Item);

		return $this;
	}

}

$Whatever = new Whatever;
$First = $Second = $Start = 0;

// now we will simulate an html template. to compare the each to a simple
// loop instead. of course the straight loop will be faster, but what i need
// to know to form my opinion is, is it faster by a landslide or not. because
// if not then i will write what i think was nicer, which is the each.

?>


<?php $Start = microtime(true); $Whatever->Each(function($What){ ?>
<?php $What; ?>
<?php }); $First = (microtime(true) - $Start); ?>

<?php $Start = microtime(true); foreach($Whatever->Items as $What): ?>
<?php $What; ?>
<?php endforeach; $Second = (microtime(true) - $Start); ?>

<?php

echo "Each: {$First}s, Loop: {$Second}s", PHP_EOL;
echo "Difference: Callable is ", ($First - $Second), "s Slower", PHP_EOL;