Online PHP editor | perf for UFBcn

<?php // build something entirely in memory... $fp = fopen('php://memory', 'r+'); fputcsv($fp, ['name', 'email', 'role']); fputcsv($fp, ['Alex', 'alex@example.com', 'CTO']); fputcsv($fp, ['Jane', 'jane@example.com', 'Dev']); rewind($fp); $csv = stream_get_contents($fp); fclose($fp); // send as download header('Content-Type: text/csv'); echo $csv; // php://temp, same but spills to disk over 2MB... or more! $fp = fopen('php://temp/maxmemory:8388608', 'r+'); // 8MB in RAM, then auto-swaps to a temp file // no gc, no unlink(), no /tmp pollution // the stream disappears when $fp is closed

Version	System time (s)	User time (s)	Memory (MiB)
8.5.6	0.014	0.003	16.69
8.5.5	0.011	0.006	16.76
8.5.3	0.027	0.005	16.23
8.4.21	0.016	0.006	19.40
8.4.18	0.011	0.010	21.55
8.4.9	0.012	0.009	19.70
8.3.18	0.011	0.007	16.62
8.3.5	0.010	0.009	16.53

Version

System time (s)

User time (s)

Memory (MiB)

8.5.6

0.014

0.003

16.69

8.5.5

0.011

0.006

16.76

8.5.3

0.027

0.005

16.23

8.4.21

0.016

0.006

19.40

8.4.18

0.011

0.010

21.55

8.4.9

0.012

0.009

19.70

8.3.18

0.011

0.007

16.62

8.3.5

0.010

0.009

16.53