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<?php $code = 'enum Mega {'; for ($i = 0; $i < 60_000; ++$i) { $code .= "case C{$i};"; } $code .= '}'; eval($code); unset($code); var_dump(memory_get_usage() / 1024 / 1024); for ($i = 0; $i < 60_000; ++$i) { constant("Mega::C{$i}"); } var_dump(memory_get_usage() / 1024 / 1024);
Output for git.master
float(15.843292236328125) float(14.04669189453125)
Output for git.master_jit
Fatal error: Out of memory (allocated 18874368 bytes) (tried to allocate 2621440 bytes) in /in/tOI8G(8) : eval()'d code on line 1 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.

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