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<?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 git.master
float(8.144950866699219)
Output for git.master_jit
float(6.996734619140625)
Output for rfc.property-hooks
float(8.207450866699219)

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52.85 ms | 401 KiB | 8 Q