3v4l.org

run code in 300+ PHP versions simultaneously
<?php function createInstance() { return eval('return new class {};'); } $startMemory = memory_get_peak_usage(); for ($i = 0; $i < 10000; $i++) { createInstance(); } var_dump((memory_get_peak_usage() - $startMemory) / 1024**2); // MB
Output for 8.4.1 - 8.4.12
float(8.20745849609375)
Output for 8.3.0 - 8.3.25
float(8.144950866699219)
Output for 8.2.0 - 8.2.29
float(8.082450866699219)
Output for 8.1.0 - 8.1.33
float(9.63592529296875)
Output for 8.0.1 - 8.0.30
float(9.323013305664062)
preferences:
71.85 ms | 410 KiB | 5 Q