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@janw-me janw-me/looptest.php
Last active May 23, 2019

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What would you like to do?
Foreach & for performance test
<?php
echo '<pre>';
$test_array = array();
for ( $i = 0; $i <= 10000; $i ++ ) {
$test_array[] = [
'index' => $i,
'include' => ( $i % 3 === 0 ) ? true : false,
];
}
$start = microtime( true );
$test_function = function ( $test_array ) {
$filtered_array = [];
foreach ( $test_array as $item ) {
if ( true === $item['include'] ) {
$filtered_array[] = $item;
}
}
return $filtered_array;
};
for ( $i = 0; $i <= 5000; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach traditional<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
foreach ( $test_array as $key => $item ) {
if ( true === $item['include'] ) {
unset( $test_array[ $key ] );
}
}
return $test_array;
};
for ( $i = 0; $i <= 5000; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach unset key<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
foreach ( $test_array as $key => &$item ) {
if ( true === $item['include'] ) {
unset( $test_array[ $key ] );
}
}
return $test_array;
};
for ( $i = 0; $i <= 5000; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach &unset key<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
$filtered_array = [];
foreach ( $test_array as &$item ) {
if ( true === $item['include'] ) {
$filtered_array[] = $item;
}
}
return $filtered_array;
};
for ( $i = 0; $i <= 5000; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach &traditional<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
$length = count( $test_array );
for ( $i = 0; $i < $length; $i ++ ) {
if ( true === $test_array[ $i ]['include'] ) {
unset( $test_array[ $i ] );
}
}
return $test_array;
};
for ( $i = 0; $i <= 5000; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: for<br/>";
echo '</pre>';
var_dump( phpversion() );
<?php
echo '<pre>';
$test_array = array();
for ( $i = 0; $i <= 10000; $i ++ ) {
$test_array[] = [
'index' => $i,
'include' => ( $i % 3 === 0 ) ? true : false,
];
}
$start = microtime( true );
$test_function = function ( $test_array ) {
$filtered_array = [];
foreach ( $test_array as $item ) {
if ( true === $item['include'] ) {
$item['index'] ++;
}
$filtered_array[] = $item;
}
return $filtered_array;
};
for ( $i = 0; $i <= 7500; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach traditional<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
foreach ( $test_array as $key => $item ) {
if ( true === $item['include'] ) {
$test_array[ $key ]['index'] ++;
}
}
return $test_array;
};
for ( $i = 0; $i <= 7500; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach unset key<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
foreach ( $test_array as $key => &$item ) {
if ( true === $item['include'] ) {
$item['index'] ++;
}
}
return $test_array;
};
for ( $i = 0; $i <= 7500; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: foreach traditional by reference<br/>";
$start = microtime( true );
$test_function = function ( $test_array ) {
$length = count( $test_array );
for ( $i = 0; $i < $length; $i ++ ) {
if ( true === $test_array[ $i ]['include'] ) {
$test_array[ $i ]['index'] ++;
}
}
return $test_array;
};
for ( $i = 0; $i <= 7500; $i ++ ) {
call_user_func( $test_function, $test_array );
}
echo microtime( true ) - $start . "sec Loop: for<br/>";
echo '</pre>';
var_dump( phpversion() );
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