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<?php $all = []; for( $i=0; $i<1000; $i++ ) { for( $j=0; $j<1000; $j++ ) { $all[$i][$j] = $j; } } $start = microtime(true); $mergedArray = array_merge(...$all); echo PHP_EOL . 'Array merge time: ' . microtime(true); $mergedArray = []; $start = microtime(true); foreach($all as &$templateClosingArray) { $mergedArray += $templateClosingArray; } echo PHP_EOL . 'Union time: ' . microtime(true);
Output for git.master_jit
Array merge time: 1761814458.1074 Union time: 1761814458.1188
Output for git.master
Array merge time: 1761814458.0884 Union time: 1761814458.0984

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