Online PHP editor | perf for 8ei2U

@ 2026-03-10T20:24:08Z

<?php

// Speedy yet memory intensive version
$f = fopen('php://memory', 'w+');
foreach($data_source as $row) {
    // You may configure fputcsv as usual
    fputcsv($f, $row);
}
rewind($f); // Important
$fp = fopen('final.csv', 'w+');
fputs($fp, stream_get_contents($f));
fclose($fp);
fclose($f);

// Slower version
$fp = fopen('final.csv', 'w+');
foreach($data_source as $row) {
    // You may configure fputcsv as usual
    fputcsv($fp, $row);
}
fclose($fp);
?>

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.5.7	0.009	0.008	16.83
8.5.6	0.013	0.005	16.91
8.5.5	0.004	0.005	16.80
8.5.3	0.010	0.008	16.84
8.4.22	0.013	0.009	19.53
8.4.21	0.007	0.015	21.61
8.4.18	0.011	0.008	21.69
8.4.9	0.007	0.011	19.89
8.3.31	0.012	0.009	18.68
8.3.18	0.007	0.003	16.87
8.3.5	0.010	0.010	16.79
8.2.31	0.008	0.012	18.29

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