modulo benchmark

modulo-benchmark.php

<?php

$array = [
	0  => 'X',
	1  => 'Y',
	2  => 'Z',
	3  => 'X',
	4  => 'Y',
	5  => 'Z',
	6  => 'X',
	7  => 'Y',
	8  => 'Z',
	9  => 'X',
	10 => 'Y',
	11 => 'Z',
];

function get_value_from_pattern( $key, $pattern = [ 'X', 'Y', 'Z' ] ): string {
	$array = [];

	for ( $i = 0; $i < ( $key + 1 ) / count( $pattern ); $i++ ) {
		$array = [ ...$array, ...$pattern ];
	}

	return $array[ $key ] ?? '';
}

function get_modulo_index_from_array( $array, $mod_index ) {
	return $array[ $mod_index % count( $array ) ];
}

function get_value_from_pattern_fill( $index, $pattern ) {
	$array = array_merge( ...array_fill( 0, $index, $pattern ) );

	return $array[ $index ] ?? '';
}

echo '<pre><code>';

$start_time = microtime( true );

for ( $i = 0; $i < 1000; $i++ ) {
	get_modulo_index_from_array( $array, $i );
}
$end_time = microtime( true );

echo 'get_modulo_index_from_array: ' . ( $end_time - $start_time )  . '<br/>';


$start_time = microtime( true );

for ( $i = 0; $i < 1000; $i++ ) {
	get_value_from_pattern( $i, $array ) . '<br/>';
}
$end_time = microtime( true );

echo 'get_value_from_pattern: ' . ( $end_time - $start_time ) . '<br/>';



$start_time = microtime( true );

for ( $i = 0; $i < 1000; $i++ ) {
	get_value_from_pattern_fill( $i, $array );
}
$end_time = microtime( true );

echo 'get_value_from_pattern_fill: ' . ( $end_time - $start_time ) .  '<br/>';


echo '</pre></code>';