Online PHP editor | refs for 6NNSP

<?php $all = []; for( $i=0; $i<2000; $i++ ) { for( $j=0; $j<500; $j++ ) { $all[$i][$j] = $j; } } $mergedArray = []; $start = microtime(true); foreach($all as &$templateClosingArray) { $mergedArray += $templateClosingArray; } $mergedArray = []; foreach($all as &$templateClosingArray) { $mergedArray += $templateClosingArray; } $mergedArray = []; foreach($all as &$templateClosingArray) { $mergedArray += $templateClosingArray; } $end = microtime(true); echo PHP_EOL . 'Union time: ' . $end; $start = microtime(true); $mergedArray = []; $mergedArray = array_merge(...$all); $mergedArray = []; $mergedArray = array_merge(...$all); $mergedArray = []; $mergedArray = array_merge(...$all); $end = microtime(true); echo PHP_EOL . 'Array merge time: ' . $end;