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<?php $arr = array(); $size = 1000000; while($size--) $arr[] = md5(microtime()); $start = microtime(true); count($arr); echo round(microtime(true) - $start, 3); ?>
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.0
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 33554440 bytes) in /in/q4gX8 on line 5
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 32 bytes) in /in/q4gX8 on line 5
Process exited with code 255.
Output for 5.4.10 - 5.4.45
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 72 bytes) in /in/q4gX8 on line 5
Process exited with code 255.
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.10, 5.4.0 - 5.4.9
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 33 bytes) in /in/q4gX8 on line 5
Process exited with code 255.
Output for 5.2.1 - 5.2.5, 5.3.11 - 5.3.29
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 71 bytes) in /in/q4gX8 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.4, 5.1.0 - 5.1.6, 5.2.0
0
Output for 5.0.5

Process exited with code 137.
preferences:
149.3 ms | 401 KiB | 216 Q