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<?php function measure($c) { $start = hrtime(true); $c(); var_dump(hrtime(true) - $start); } const ITERS = 10000; measure(function () { $array = []; for ($i = 0; $i < ITERS; $i++) { $array[] = $i; } }); measure(function () { $array = []; for ($i = 0; $i < ITERS; $i++) { $copy = $array; $array[] = $i; } });
Output for 8.3.7
int(307132) int(106309725)
Output for 8.3.6
int(438821) int(75956917)
Output for 8.3.5
int(203667) int(70079771)
Output for 8.3.4
int(245169) int(98157595)
Output for 8.3.3
int(320161) int(81017386)
Output for 8.3.2
int(157918) int(69451699)
Output for 8.3.1
int(235565) int(98008422)
Output for 8.3.0
int(172219) int(88952014)
Output for 8.2.19
int(378531) int(90439994)
Output for 8.2.18
int(435255) int(87092024)
Output for 8.2.17
int(171758) int(69637879)
Output for 8.2.16
int(240342) int(91532652)
Output for 8.2.15
int(278720) int(89411305)
Output for 8.2.14
int(278230) int(101319932)
Output for 8.2.13
int(284048) int(80612637)
Output for 8.2.12
int(250889) int(87609911)
Output for 8.2.11
int(195585) int(70567309)
Output for 8.2.10
int(313272) int(89735284)
Output for 8.2.9
int(190056) int(69421443)
Output for 8.2.8
int(187412) int(70154657)
Output for 8.2.7
int(171058) int(69051234)
Output for 8.2.6
int(259271) int(80267186)
Output for 8.2.5
int(253382) int(97625654)
Output for 8.2.4
int(304920) int(78486704)
Output for 8.2.3
int(334253) int(103975513)
Output for 8.2.2
int(198429) int(69654735)
Output for 8.2.1
int(172320) int(80542432)
Output for 8.2.0
int(251138) int(87070198)
Output for 8.1.28
int(515687) int(116840558)
Output for 8.1.27
int(168845) int(116534198)
Output for 8.1.26
int(167953) int(110778345)
Output for 8.1.25
int(251228) int(119660029)
Output for 8.1.24
int(181414) int(110305793)
Output for 8.1.23
int(244088) int(116761040)
Output for 8.1.22
int(182997) int(108773013)
Output for 8.1.21
int(176936) int(111012447)
Output for 8.1.20
int(175564) int(109151193)
Output for 8.1.19
int(190889) int(112123472)
Output for 8.1.18
int(173611) int(131835416)
Output for 8.1.17
int(255244) int(133541579)
Output for 8.1.16
int(265199) int(136693879)
Output for 8.1.15
int(219450) int(112987224)
Output for 8.1.14
int(337578) int(136368378)
Output for 8.1.13
int(210408) int(126188297)
Output for 8.1.12
int(256856) int(141969237)
Output for 8.1.11
int(264850) int(128726582)
Output for 8.1.10
int(169415) int(130414526)
Output for 8.1.9
int(257437) int(118993874)
Output for 8.1.8
int(252409) int(136624523)
Output for 8.1.7
int(261675) int(128527181)
Output for 8.1.6
int(280433) int(128198506)
Output for 8.1.5
int(352422) int(129277271)
Output for 8.1.4
int(275986) int(118930900)
Output for 8.1.3
int(265480) int(132454550)
Output for 8.1.2
int(273372) int(116045073)
Output for 8.1.1
int(180422) int(108606993)
Output for 8.1.0
int(190247) int(109096501)

preferences:
55.46 ms | 401 KiB | 62 Q