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<?php function generator($array, $prefix) { foreach ($array as $k => $v) { yield $prefix . $k => $v; } } function generatorPrefix($array, $prefix = 'prefix') { return iterator_to_array(generator($array, $prefix)); } function constructPrefix($array, $prefix = 'prefix') { // 1 loop over data $result = []; foreach ($array as $k => $v) { $result[$prefix . $k] = $v; } return $result; } function mapKeyAndCombinePrefix($array, $prefix = 'prefix') { // 3 loops over data return array_combine( array_map( fn($k) => $prefix . $k, array_keys($array) ), $array ); } function walkPrefix($array, $prefix = 'prefix') { // 1 loop over data $result = []; array_walk( $array, function($v, $k, $prefix) use (&$result) { $result[$prefix . $k] = $v; }, $prefix ); return $result; } function reducePrefix($array, $prefix = 'prefix') { // 2 loops over data return array_reduce( array_keys($array), function($result, $k) use ($array, $prefix) { $result[$prefix . $k] = $array[$k]; return $result; }, [] ); } function returnTime(callable $function, int $repeat = 20) { $tests = []; for ($i = 0; $i < $repeat; ++$i) { $startTime = microtime(true); $function(); $endTime = microtime(true); $tests[] = $endTime - $startTime; } // Representing the average return 1000 * array_sum($tests) / $repeat; } $array = range(0, 5000); foreach (['generatorPrefix', 'constructPrefix', 'mapKeyAndCombinePrefix', 'walkPrefix', 'reducePrefix'] as $test) { echo "Duration of $test: ", returnTime(fn() => $test($array)) . PHP_EOL; }
Output for 8.3.3
Duration of generatorPrefix: 0.85117816925049 Duration of constructPrefix: 0.59841871261597 Duration of mapKeyAndCombinePrefix: 0.68570375442505 Duration of walkPrefix: 0.78155994415283 Duration of reducePrefix: 74.397504329681
Output for 8.2.5
Duration of generatorPrefix: 0.58324337005615 Duration of constructPrefix: 0.36159753799438 Duration of mapKeyAndCombinePrefix: 0.52124261856079 Duration of walkPrefix: 0.77606439590454 Duration of reducePrefix: 49.715828895569
Output for 8.2.4
Duration of generatorPrefix: 0.56190490722656 Duration of constructPrefix: 0.37626028060913 Duration of mapKeyAndCombinePrefix: 0.51709413528442 Duration of walkPrefix: 0.7630467414856 Duration of reducePrefix: 49.614691734314
Output for 8.2.3
Duration of generatorPrefix: 0.56480169296265 Duration of constructPrefix: 0.34739971160889 Duration of mapKeyAndCombinePrefix: 0.54835081100464 Duration of walkPrefix: 0.77170133590698 Duration of reducePrefix: 49.398875236511
Output for 8.2.2
Duration of generatorPrefix: 0.56043863296509 Duration of constructPrefix: 0.36715269088745 Duration of mapKeyAndCombinePrefix: 0.53510665893555 Duration of walkPrefix: 0.78819990158081 Duration of reducePrefix: 50.233852863312
Output for 8.2.1
Duration of generatorPrefix: 0.55787563323975 Duration of constructPrefix: 0.36995410919189 Duration of mapKeyAndCombinePrefix: 0.51275491714478 Duration of walkPrefix: 0.76674222946167 Duration of reducePrefix: 49.588537216187
Output for 8.2.0
Duration of generatorPrefix: 0.56329965591431 Duration of constructPrefix: 0.35265684127808 Duration of mapKeyAndCombinePrefix: 0.5262017250061 Duration of walkPrefix: 0.74641704559326 Duration of reducePrefix: 49.354982376099
Output for 8.1.18
Duration of generatorPrefix: 0.53155422210693 Duration of constructPrefix: 0.44355392456055 Duration of mapKeyAndCombinePrefix: 0.52729845046997 Duration of walkPrefix: 0.75016021728516 Duration of reducePrefix: 48.440361022949
Output for 8.1.17
Duration of generatorPrefix: 0.67925453186035 Duration of constructPrefix: 0.383460521698 Duration of mapKeyAndCombinePrefix: 0.55079460144043 Duration of walkPrefix: 0.7698655128479 Duration of reducePrefix: 48.888599872589
Output for 8.1.16
Duration of generatorPrefix: 0.58465003967285 Duration of constructPrefix: 0.36314725875854 Duration of mapKeyAndCombinePrefix: 0.52469968795776 Duration of walkPrefix: 0.7632851600647 Duration of reducePrefix: 48.748505115509
Output for 8.1.15
Duration of generatorPrefix: 0.54954290390015 Duration of constructPrefix: 0.36411285400391 Duration of mapKeyAndCombinePrefix: 0.49804449081421 Duration of walkPrefix: 0.73421001434326 Duration of reducePrefix: 48.418247699738
Output for 8.1.14
Duration of generatorPrefix: 0.56233406066895 Duration of constructPrefix: 0.36699771881104 Duration of mapKeyAndCombinePrefix: 0.52549839019775 Duration of walkPrefix: 0.72935819625854 Duration of reducePrefix: 48.806571960449
Output for 8.1.13
Duration of generatorPrefix: 0.53441524505615 Duration of constructPrefix: 0.36830902099609 Duration of mapKeyAndCombinePrefix: 0.54150819778442 Duration of walkPrefix: 0.76372623443604 Duration of reducePrefix: 48.424673080444
Output for 8.1.12
Duration of generatorPrefix: 0.5894660949707 Duration of constructPrefix: 0.42051076889038 Duration of mapKeyAndCombinePrefix: 0.57275295257568 Duration of walkPrefix: 0.80664157867432 Duration of reducePrefix: 48.860549926758
Output for 8.1.11
Duration of generatorPrefix: 0.55693387985229 Duration of constructPrefix: 0.36120414733887 Duration of mapKeyAndCombinePrefix: 0.52821636199951 Duration of walkPrefix: 0.7377028465271 Duration of reducePrefix: 48.412299156189
Output for 8.1.10
Duration of generatorPrefix: 0.53906440734863 Duration of constructPrefix: 0.36259889602661 Duration of mapKeyAndCombinePrefix: 0.54460763931274 Duration of walkPrefix: 0.79183578491211 Duration of reducePrefix: 48.615169525146
Output for 8.1.9
Duration of generatorPrefix: 0.55428743362427 Duration of constructPrefix: 0.37809610366821 Duration of mapKeyAndCombinePrefix: 0.63841342926025 Duration of walkPrefix: 0.77544450759888 Duration of reducePrefix: 49.209141731262
Output for 8.1.8
Duration of generatorPrefix: 0.5673885345459 Duration of constructPrefix: 0.37616491317749 Duration of mapKeyAndCombinePrefix: 0.53874254226685 Duration of walkPrefix: 0.77381134033203 Duration of reducePrefix: 48.620641231537
Output for 8.1.7
Duration of generatorPrefix: 0.56085586547852 Duration of constructPrefix: 0.35805702209473 Duration of mapKeyAndCombinePrefix: 0.54166316986084 Duration of walkPrefix: 0.7969856262207 Duration of reducePrefix: 48.606789112091
Output for 8.1.6
Duration of generatorPrefix: 0.54082870483398 Duration of constructPrefix: 0.38925409317017 Duration of mapKeyAndCombinePrefix: 0.5384087562561 Duration of walkPrefix: 0.7783055305481 Duration of reducePrefix: 48.62277507782
Output for 8.1.5
Duration of generatorPrefix: 0.57696104049683 Duration of constructPrefix: 0.38360357284546 Duration of mapKeyAndCombinePrefix: 0.50973892211914 Duration of walkPrefix: 0.77170133590698 Duration of reducePrefix: 48.526930809021
Output for 8.1.4
Duration of generatorPrefix: 0.56849718093872 Duration of constructPrefix: 0.36358833312988 Duration of mapKeyAndCombinePrefix: 0.52965879440308 Duration of walkPrefix: 0.75725317001343 Duration of reducePrefix: 49.2302775383
Output for 8.1.3
Duration of generatorPrefix: 0.57655572891235 Duration of constructPrefix: 0.37574768066406 Duration of mapKeyAndCombinePrefix: 0.53820610046387 Duration of walkPrefix: 0.78009366989136 Duration of reducePrefix: 48.667943477631
Output for 8.1.2
Duration of generatorPrefix: 0.56065320968628 Duration of constructPrefix: 0.36300420761108 Duration of mapKeyAndCombinePrefix: 0.5295991897583 Duration of walkPrefix: 0.74894428253174 Duration of reducePrefix: 48.742640018463
Output for 8.1.1
Duration of generatorPrefix: 0.5732536315918 Duration of constructPrefix: 0.38059949874878 Duration of mapKeyAndCombinePrefix: 0.52319765090942 Duration of walkPrefix: 0.79655647277832 Duration of reducePrefix: 48.578524589539
Output for 8.1.0
Duration of generatorPrefix: 0.58194398880005 Duration of constructPrefix: 0.36020278930664 Duration of mapKeyAndCombinePrefix: 0.52180290222168 Duration of walkPrefix: 0.77934265136719 Duration of reducePrefix: 48.883938789368
Output for 8.0.28
Duration of generatorPrefix: 0.60321092605591 Duration of constructPrefix: 0.38496255874634 Duration of mapKeyAndCombinePrefix: 0.52932500839233 Duration of walkPrefix: 0.82440376281738 Duration of reducePrefix: 49.04568195343
Output for 8.0.27
Duration of generatorPrefix: 0.58315992355347 Duration of constructPrefix: 0.37709474563599 Duration of mapKeyAndCombinePrefix: 0.53534507751465 Duration of walkPrefix: 0.78728199005127 Duration of reducePrefix: 48.929035663605
Output for 8.0.26
Duration of generatorPrefix: 0.60575008392334 Duration of constructPrefix: 0.38235187530518 Duration of mapKeyAndCombinePrefix: 0.54968595504761 Duration of walkPrefix: 0.78322887420654 Duration of reducePrefix: 48.251557350159
Output for 8.0.25
Duration of generatorPrefix: 0.55550336837769 Duration of constructPrefix: 0.37364959716797 Duration of mapKeyAndCombinePrefix: 0.54495334625244 Duration of walkPrefix: 0.81800222396851 Duration of reducePrefix: 49.172616004944
Output for 8.0.24
Duration of generatorPrefix: 0.60075521469116 Duration of constructPrefix: 0.41990280151367 Duration of mapKeyAndCombinePrefix: 0.54695606231689 Duration of walkPrefix: 0.85530281066895 Duration of reducePrefix: 49.09508228302
Output for 8.0.23
Duration of generatorPrefix: 0.62224864959717 Duration of constructPrefix: 0.41625499725342 Duration of mapKeyAndCombinePrefix: 0.56115388870239 Duration of walkPrefix: 0.83884000778198 Duration of reducePrefix: 48.76309633255
Output for 8.0.22
Duration of generatorPrefix: 0.61010122299194 Duration of constructPrefix: 0.38490295410156 Duration of mapKeyAndCombinePrefix: 0.545334815979 Duration of walkPrefix: 0.79613924026489 Duration of reducePrefix: 48.494601249695
Output for 8.0.21
Duration of generatorPrefix: 0.62224864959717 Duration of constructPrefix: 0.41494369506836 Duration of mapKeyAndCombinePrefix: 0.56700706481934 Duration of walkPrefix: 0.87834596633911 Duration of reducePrefix: 49.463963508606
Output for 8.0.20
Duration of generatorPrefix: 0.57485103607178 Duration of constructPrefix: 0.41334629058838 Duration of mapKeyAndCombinePrefix: 0.52710771560669 Duration of walkPrefix: 0.80870389938354 Duration of reducePrefix: 48.719298839569
Output for 8.0.19
Duration of generatorPrefix: 0.59500932693481 Duration of constructPrefix: 0.39376020431519 Duration of mapKeyAndCombinePrefix: 0.53329467773438 Duration of walkPrefix: 0.81616640090942 Duration of reducePrefix: 49.039041996002
Output for 8.0.18
Duration of generatorPrefix: 0.58591365814209 Duration of constructPrefix: 0.40109157562256 Duration of mapKeyAndCombinePrefix: 0.54736137390137 Duration of walkPrefix: 0.84506273269653 Duration of reducePrefix: 48.71324300766
Output for 8.0.17
Duration of generatorPrefix: 0.60186386108398 Duration of constructPrefix: 0.41285753250122 Duration of mapKeyAndCombinePrefix: 0.53720474243164 Duration of walkPrefix: 0.78245401382446 Duration of reducePrefix: 48.556590080261
Output for 8.0.16
Duration of generatorPrefix: 0.58504343032837 Duration of constructPrefix: 0.40054321289062 Duration of mapKeyAndCombinePrefix: 0.54188966751099 Duration of walkPrefix: 0.78145265579224 Duration of reducePrefix: 48.619961738586
Output for 8.0.15
Duration of generatorPrefix: 0.57508945465088 Duration of constructPrefix: 0.40359497070312 Duration of mapKeyAndCombinePrefix: 0.51658153533936 Duration of walkPrefix: 0.81510543823242 Duration of reducePrefix: 48.81500005722
Output for 8.0.14
Duration of generatorPrefix: 0.60617923736572 Duration of constructPrefix: 0.39725303649902 Duration of mapKeyAndCombinePrefix: 0.54030418395996 Duration of walkPrefix: 0.86028575897217 Duration of reducePrefix: 48.920655250549
Output for 8.0.13
Duration of generatorPrefix: 0.55315494537354 Duration of constructPrefix: 0.40789842605591 Duration of mapKeyAndCombinePrefix: 0.54893493652344 Duration of walkPrefix: 0.80809593200684 Duration of reducePrefix: 48.804998397827
Output for 8.0.12
Duration of generatorPrefix: 0.58495998382568 Duration of constructPrefix: 0.39260387420654 Duration of mapKeyAndCombinePrefix: 0.53679943084717 Duration of walkPrefix: 0.79125165939331 Duration of reducePrefix: 48.64856004715
Output for 8.0.11
Duration of generatorPrefix: 0.57923793792725 Duration of constructPrefix: 0.39114952087402 Duration of mapKeyAndCombinePrefix: 0.54594278335571 Duration of walkPrefix: 0.77284574508667 Duration of reducePrefix: 48.64410161972
Output for 8.0.10
Duration of generatorPrefix: 0.61109066009521 Duration of constructPrefix: 0.3851056098938 Duration of mapKeyAndCombinePrefix: 0.52164793014526 Duration of walkPrefix: 0.79728364944458 Duration of reducePrefix: 48.60417842865
Output for 8.0.9
Duration of generatorPrefix: 0.56935548782349 Duration of constructPrefix: 0.38394927978516 Duration of mapKeyAndCombinePrefix: 0.53819417953491 Duration of walkPrefix: 0.81360340118408 Duration of reducePrefix: 48.943281173706
Output for 8.0.8
Duration of generatorPrefix: 0.57364702224731 Duration of constructPrefix: 0.38635730743408 Duration of mapKeyAndCombinePrefix: 0.52618980407715 Duration of walkPrefix: 0.8156418800354 Duration of reducePrefix: 48.509550094604
Output for 8.0.7
Duration of generatorPrefix: 0.62434673309326 Duration of constructPrefix: 0.38238763809204 Duration of mapKeyAndCombinePrefix: 0.55204629898071 Duration of walkPrefix: 0.85375308990479 Duration of reducePrefix: 48.436522483826
Output for 8.0.6
Duration of generatorPrefix: 0.64624547958374 Duration of constructPrefix: 0.40628910064697 Duration of mapKeyAndCombinePrefix: 0.54130554199219 Duration of walkPrefix: 0.80910921096802 Duration of reducePrefix: 48.604774475098
Output for 8.0.5
Duration of generatorPrefix: 0.62156915664673 Duration of constructPrefix: 0.40440559387207 Duration of mapKeyAndCombinePrefix: 0.54465532302856 Duration of walkPrefix: 0.84550380706787 Duration of reducePrefix: 48.453950881958
Output for 8.0.3
Duration of generatorPrefix: 0.61554908752441 Duration of constructPrefix: 0.38399696350098 Duration of mapKeyAndCombinePrefix: 0.54938793182373 Duration of walkPrefix: 0.82930326461792 Duration of reducePrefix: 48.664391040802
Output for 8.0.2
Duration of generatorPrefix: 0.61019659042358 Duration of constructPrefix: 0.38881301879883 Duration of mapKeyAndCombinePrefix: 0.53318738937378 Duration of walkPrefix: 0.84215402603149 Duration of reducePrefix: 48.371958732605
Output for 8.0.1
Duration of generatorPrefix: 0.59101581573486 Duration of constructPrefix: 0.39324760437012 Duration of mapKeyAndCombinePrefix: 0.5278468132019 Duration of walkPrefix: 0.82341432571411 Duration of reducePrefix: 48.64319562912
preferences:
81.6 ms | 401 KiB | 58 Q