Array merge in loop
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<?php | |
function printMemory($start, $header) { | |
printf( | |
"%s - Time: %s | Memory (current): %s KB | Memory (max): %s KB" . PHP_EOL, | |
$header, | |
number_format(round((microtime(true) - $start) * 1000, 6), 6, ',', ''), | |
number_format(round((memory_get_usage() / 1024), 2), 2, ',', ''), | |
number_format(round((memory_get_peak_usage() / 1024), 2), 2, ',', '') | |
); | |
} | |
$countProducts = 500; | |
$countTags = 1; | |
$products = []; | |
for($i = 1; $i <= $countProducts; $i++) { | |
$tags = []; | |
for($n = 1; $n <= $countTags; $n++) { | |
$tags[] = 'tag_' . $i . '_' . $n; | |
} | |
$products[] = [ | |
'id' => $i, | |
'tags' => $tags, | |
]; | |
} | |
$start = microtime(true); | |
$tags = []; | |
foreach($products as $product) { | |
$tags = array_merge($tags, $product['tags']); | |
} | |
printMemory($start, 'array_merge in loop'); |
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