3v4l.org

run code in 300+ PHP versions simultaneously
#!/usr/bin/php <?php declare(strict_types=1); const ITERATIONS = 100000; $results = array(); for ($i = 0; $i < ITERATIONS; ++$i) { // heat up cpu (if it was powersaving-running-low-cus-nothing-was-happening, most modern cpus try to do it by default) } function array_is_list_post(array $array): bool { $i = 0; foreach ($array as $k => $v) { if ($k !== $i++) { return false; } } return true; } function array_is_list_pre(array $array): bool { $i = -1; foreach ($array as $k => $v) { ++$i; if ($k !== $i) { return false; } } return true; } $l1 = str_split(str_repeat("A", 300), 1); $t = microtime(true); for ($i = 0; $i < ITERATIONS; ++$i) { array_is_list_pre($l1); } $t = microtime(true) - $t; $results["pre"] = $t; $t = microtime(true); for ($i = 0; $i < ITERATIONS; ++$i) { array_is_list_post($l1); } $t = microtime(true) - $t; $results["post"] = $t; if ($results["pre"] === $results["post"]) { echo "it's a tie!"; } elseif ($results["pre"] < $results["post"]) { echo "pre is faster!"; } else { echo "post is faster!"; } echo "diff: " . abs(($results["pre"] - $results["post"])) . "\n"; var_dump($results); exit();

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Output for 8.3.9
post is faster!diff: 0.0054540634155273 array(2) { ["pre"]=> float(0.33149099349975586) ["post"]=> float(0.3260369300842285) }
Output for 8.3.8
pre is faster!diff: 0.025779008865356 array(2) { ["pre"]=> float(0.322343111038208) ["post"]=> float(0.34812211990356445) }
Output for 8.3.7
pre is faster!diff: 0.023969888687134 array(2) { ["pre"]=> float(0.43116307258605957) ["post"]=> float(0.45513296127319336) }
Output for 8.3.6
pre is faster!diff: 0.040205955505371 array(2) { ["pre"]=> float(0.4261891841888428) ["post"]=> float(0.46639513969421387) }
Output for 8.3.5
post is faster!diff: 0.019736051559448 array(2) { ["pre"]=> float(0.45367908477783203) ["post"]=> float(0.4339430332183838) }
Output for 8.3.4
post is faster!diff: 0.032525777816772 array(2) { ["pre"]=> float(0.4571218490600586) ["post"]=> float(0.42459607124328613) }
Output for 8.3.3
pre is faster!diff: 0.023409128189087 array(2) { ["pre"]=> float(0.43433094024658203) ["post"]=> float(0.45774006843566895) }
Output for 8.3.2
pre is faster!diff: 0.017924785614014 array(2) { ["pre"]=> float(0.3809030055999756) ["post"]=> float(0.39882779121398926) }
Output for 8.3.1
post is faster!diff: 0.023842096328735 array(2) { ["pre"]=> float(0.48618412017822266) ["post"]=> float(0.4623420238494873) }
Output for 8.3.0
pre is faster!diff: 0.025941848754883 array(2) { ["pre"]=> float(0.42113614082336426) ["post"]=> float(0.44707798957824707) }
Output for 8.2.19
pre is faster!diff: 0.060794115066528 array(2) { ["pre"]=> float(0.429534912109375) ["post"]=> float(0.4903290271759033) }
Output for 8.2.18
pre is faster!diff: 0.013973951339722 array(2) { ["pre"]=> float(0.4186129570007324) ["post"]=> float(0.4325869083404541) }
Output for 8.2.17
pre is faster!diff: 0.087929010391235 array(2) { ["pre"]=> float(0.3807389736175537) ["post"]=> float(0.46866798400878906) }
Output for 8.2.16
post is faster!diff: 0.005558967590332 array(2) { ["pre"]=> float(0.38791704177856445) ["post"]=> float(0.3823580741882324) }
Output for 8.2.15
pre is faster!diff: 0.019092082977295 array(2) { ["pre"]=> float(0.44643402099609375) ["post"]=> float(0.46552610397338867) }
Output for 8.2.14
post is faster!diff: 0.078896999359131 array(2) { ["pre"]=> float(0.4804520606994629) ["post"]=> float(0.40155506134033203) }
Output for 8.2.13
pre is faster!diff: 0.0084969997406006 array(2) { ["pre"]=> float(0.4179549217224121) ["post"]=> float(0.4264519214630127) }
Output for 8.2.12
post is faster!diff: 0.0079572200775146 array(2) { ["pre"]=> float(0.4646310806274414) ["post"]=> float(0.45667386054992676) }
Output for 8.2.11
pre is faster!diff: 0.034702062606812 array(2) { ["pre"]=> float(0.38806605339050293) ["post"]=> float(0.42276811599731445) }
Output for 8.2.10
pre is faster!diff: 0.081495761871338 array(2) { ["pre"]=> float(0.39495015144348145) ["post"]=> float(0.47644591331481934) }
Output for 8.2.9
pre is faster!diff: 0.057492256164551 array(2) { ["pre"]=> float(0.38394689559936523) ["post"]=> float(0.441439151763916) }
Output for 8.2.8
pre is faster!diff: 0.050194025039673 array(2) { ["pre"]=> float(0.3944408893585205) ["post"]=> float(0.44463491439819336) }
Output for 8.2.7
pre is faster!diff: 0.057390928268433 array(2) { ["pre"]=> float(0.3989450931549072) ["post"]=> float(0.45633602142333984) }
Output for 8.2.6
pre is faster!diff: 0.10125684738159 array(2) { ["pre"]=> float(0.36898303031921387) ["post"]=> float(0.47023987770080566) }
Output for 8.2.5
pre is faster!diff: 0.014163255691528 array(2) { ["pre"]=> float(0.4216299057006836) ["post"]=> float(0.4357931613922119) }
Output for 8.2.4
pre is faster!diff: 0.03587007522583 array(2) { ["pre"]=> float(0.47032999992370605) ["post"]=> float(0.5062000751495361) }
Output for 8.2.3
pre is faster!diff: 0.0069341659545898 array(2) { ["pre"]=> float(0.4054548740386963) ["post"]=> float(0.41238903999328613) }
Output for 8.2.2
pre is faster!diff: 0.017773151397705 array(2) { ["pre"]=> float(0.460892915725708) ["post"]=> float(0.4786660671234131) }
Output for 8.2.1
pre is faster!diff: 0.032455921173096 array(2) { ["pre"]=> float(0.38637304306030273) ["post"]=> float(0.41882896423339844) }
Output for 8.2.0
pre is faster!diff: 0.014997005462646 array(2) { ["pre"]=> float(0.39569091796875) ["post"]=> float(0.4106879234313965) }
Output for 8.1.28
pre is faster!diff: 0.034915924072266 array(2) { ["pre"]=> float(0.450592041015625) ["post"]=> float(0.4855079650878906) }
Output for 8.1.27
pre is faster!diff: 0.022325277328491 array(2) { ["pre"]=> float(0.4068589210510254) ["post"]=> float(0.4291841983795166) }
Output for 8.1.26
post is faster!diff: 0.041581153869629 array(2) { ["pre"]=> float(0.46034717559814453) ["post"]=> float(0.4187660217285156) }
Output for 8.1.25
pre is faster!diff: 0.038396120071411 array(2) { ["pre"]=> float(0.3892018795013428) ["post"]=> float(0.4275979995727539) }
Output for 8.1.24
post is faster!diff: 0.021106004714966 array(2) { ["pre"]=> float(0.44040608406066895) ["post"]=> float(0.4193000793457031) }
Output for 8.1.23
pre is faster!diff: 0.060282230377197 array(2) { ["pre"]=> float(0.4309678077697754) ["post"]=> float(0.49125003814697266) }
Output for 8.1.22
post is faster!diff: 0.01437783241272 array(2) { ["pre"]=> float(0.4418518543243408) ["post"]=> float(0.4274740219116211) }
Output for 8.1.21
post is faster!diff: 0.019964218139648 array(2) { ["pre"]=> float(0.4502260684967041) ["post"]=> float(0.43026185035705566) }
Output for 8.1.20
pre is faster!diff: 0.044812917709351 array(2) { ["pre"]=> float(0.394787073135376) ["post"]=> float(0.43959999084472656) }
Output for 8.1.19
pre is faster!diff: 0.087178945541382 array(2) { ["pre"]=> float(0.38529396057128906) ["post"]=> float(0.4724729061126709) }
Output for 8.1.18
pre is faster!diff: 0.055192947387695 array(2) { ["pre"]=> float(0.3920300006866455) ["post"]=> float(0.4472229480743408) }
Output for 8.1.17
pre is faster!diff: 0.010203123092651 array(2) { ["pre"]=> float(0.4220399856567383) ["post"]=> float(0.43224310874938965) }
Output for 8.1.16
pre is faster!diff: 0.063184022903442 array(2) { ["pre"]=> float(0.41446495056152344) ["post"]=> float(0.4776489734649658) }
Output for 8.1.15
post is faster!diff: 0.010638952255249 array(2) { ["pre"]=> float(0.4136049747467041) ["post"]=> float(0.4029660224914551) }
Output for 8.1.14
pre is faster!diff: 0.027602195739746 array(2) { ["pre"]=> float(0.3959019184112549) ["post"]=> float(0.423504114151001) }
Output for 8.1.13
post is faster!diff: 0.040143966674805 array(2) { ["pre"]=> float(0.440885066986084) ["post"]=> float(0.4007411003112793) }
Output for 8.1.12
pre is faster!diff: 0.036789894104004 array(2) { ["pre"]=> float(0.4287881851196289) ["post"]=> float(0.4655780792236328) }
Output for 8.1.11
post is faster!diff: 0.011466026306152 array(2) { ["pre"]=> float(0.40964508056640625) ["post"]=> float(0.3981790542602539) }
Output for 8.1.10
pre is faster!diff: 0.11338996887207 array(2) { ["pre"]=> float(0.4477410316467285) ["post"]=> float(0.5611310005187988) }
Output for 8.1.9
pre is faster!diff: 0.070356130599976 array(2) { ["pre"]=> float(0.38141679763793945) ["post"]=> float(0.45177292823791504) }
Output for 8.1.8
pre is faster!diff: 0.019978046417236 array(2) { ["pre"]=> float(0.42104506492614746) ["post"]=> float(0.4410231113433838) }
Output for 8.1.7
pre is faster!diff: 0.00080394744873047 array(2) { ["pre"]=> float(0.43268489837646484) ["post"]=> float(0.4334888458251953) }
Output for 8.1.6
pre is faster!diff: 0.029291152954102 array(2) { ["pre"]=> float(0.44634079933166504) ["post"]=> float(0.4756319522857666) }
Output for 8.1.5
pre is faster!diff: 0.075628995895386 array(2) { ["pre"]=> float(0.3889040946960449) ["post"]=> float(0.46453309059143066) }
Output for 8.1.4
pre is faster!diff: 0.095649003982544 array(2) { ["pre"]=> float(0.36754298210144043) ["post"]=> float(0.4631919860839844) }
Output for 8.1.3
pre is faster!diff: 0.012316942214966 array(2) { ["pre"]=> float(0.46236300468444824) ["post"]=> float(0.47467994689941406) }
Output for 8.1.2
pre is faster!diff: 0.0077691078186035 array(2) { ["pre"]=> float(0.3949768543243408) ["post"]=> float(0.40274596214294434) }
Output for 8.1.1
pre is faster!diff: 0.087950944900513 array(2) { ["pre"]=> float(0.43064117431640625) ["post"]=> float(0.518592119216919) }
Output for 8.1.0
pre is faster!diff: 0.0016381740570068 array(2) { ["pre"]=> float(0.4361279010772705) ["post"]=> float(0.43776607513427734) }
Output for 8.0.30
pre is faster!diff: 0.049188137054443 array(2) { ["pre"]=> float(0.4816920757293701) ["post"]=> float(0.5308802127838135) }
Output for 8.0.29
pre is faster!diff: 0.049494981765747 array(2) { ["pre"]=> float(0.5185861587524414) ["post"]=> float(0.5680811405181885) }
Output for 8.0.28
pre is faster!diff: 0.0018818378448486 array(2) { ["pre"]=> float(0.4996931552886963) ["post"]=> float(0.5015749931335449) }
Output for 8.0.27
pre is faster!diff: 0.07614803314209 array(2) { ["pre"]=> float(0.46466803550720215) ["post"]=> float(0.540816068649292) }
Output for 8.0.26
pre is faster!diff: 0.035093784332275 array(2) { ["pre"]=> float(0.47397708892822266) ["post"]=> float(0.509070873260498) }
Output for 8.0.25
pre is faster!diff: 0.10557818412781 array(2) { ["pre"]=> float(0.45707082748413086) ["post"]=> float(0.5626490116119385) }
Output for 8.0.24
pre is faster!diff: 0.0029728412628174 array(2) { ["pre"]=> float(0.48981809616088867) ["post"]=> float(0.49279093742370605) }
Output for 8.0.23
post is faster!diff: 0.0058491230010986 array(2) { ["pre"]=> float(0.49754810333251953) ["post"]=> float(0.4916989803314209) }
Output for 8.0.22
post is faster!diff: 0.027727842330933 array(2) { ["pre"]=> float(0.4760420322418213) ["post"]=> float(0.44831418991088867) }
Output for 8.0.21
post is faster!diff: 0.015854835510254 array(2) { ["pre"]=> float(0.5341348648071289) ["post"]=> float(0.518280029296875) }
Output for 8.0.20
pre is faster!diff: 0.018955945968628 array(2) { ["pre"]=> float(0.4869511127471924) ["post"]=> float(0.5059070587158203) }
Output for 8.0.19
pre is faster!diff: 0.062944889068604 array(2) { ["pre"]=> float(0.48481321334838867) ["post"]=> float(0.5477581024169922) }
Output for 8.0.18
pre is faster!diff: 0.053524971008301 array(2) { ["pre"]=> float(0.4444730281829834) ["post"]=> float(0.4979979991912842) }
Output for 8.0.17
pre is faster!diff: 0.040069103240967 array(2) { ["pre"]=> float(0.4390449523925781) ["post"]=> float(0.4791140556335449) }
Output for 8.0.16
pre is faster!diff: 0.028533935546875 array(2) { ["pre"]=> float(0.4782540798187256) ["post"]=> float(0.5067880153656006) }
Output for 8.0.15
pre is faster!diff: 0.027268171310425 array(2) { ["pre"]=> float(0.44123387336730957) ["post"]=> float(0.4685020446777344) }
Output for 8.0.14
pre is faster!diff: 0.0050399303436279 array(2) { ["pre"]=> float(0.42872095108032227) ["post"]=> float(0.4337608814239502) }
Output for 8.0.13
pre is faster!diff: 0.022372007369995 array(2) { ["pre"]=> float(0.5070059299468994) ["post"]=> float(0.5293779373168945) }
Output for 8.0.12
pre is faster!diff: 0.0028603076934814 array(2) { ["pre"]=> float(0.44800877571105957) ["post"]=> float(0.450869083404541) }
Output for 8.0.11
pre is faster!diff: 0.04728889465332 array(2) { ["pre"]=> float(0.43794798851013184) ["post"]=> float(0.48523688316345215) }
Output for 8.0.10
pre is faster!diff: 0.022284746170044 array(2) { ["pre"]=> float(0.45797109603881836) ["post"]=> float(0.4802558422088623) }
Output for 8.0.9
post is faster!diff: 0.021166086196899 array(2) { ["pre"]=> float(0.4814491271972656) ["post"]=> float(0.4602830410003662) }
Output for 8.0.8
pre is faster!diff: 0.042786836624146 array(2) { ["pre"]=> float(0.4542701244354248) ["post"]=> float(0.4970569610595703) }
Output for 8.0.7
post is faster!diff: 0.002269983291626 array(2) { ["pre"]=> float(0.49439287185668945) ["post"]=> float(0.4921228885650635) }
Output for 8.0.6
pre is faster!diff: 0.0049676895141602 array(2) { ["pre"]=> float(0.4519951343536377) ["post"]=> float(0.45696282386779785) }
Output for 8.0.5
post is faster!diff: 0.03320574760437 array(2) { ["pre"]=> float(0.47672295570373535) ["post"]=> float(0.44351720809936523) }
Output for 8.0.3
pre is faster!diff: 0.052018880844116 array(2) { ["pre"]=> float(0.44350314140319824) ["post"]=> float(0.49552202224731445) }
Output for 8.0.2
pre is faster!diff: 0.015632152557373 array(2) { ["pre"]=> float(0.4760267734527588) ["post"]=> float(0.49165892601013184) }
Output for 8.0.1
pre is faster!diff: 0.023964166641235 array(2) { ["pre"]=> float(0.46223878860473633) ["post"]=> float(0.4862029552459717) }
Output for 7.4.33
pre is faster!diff: 0.021136045455933 array(2) { ["pre"]=> float(0.32838201522827) ["post"]=> float(0.3495180606842) }
Output for 7.4.32
pre is faster!diff: 0.026437997817993 array(2) { ["pre"]=> float(0.5290310382843) ["post"]=> float(0.55546903610229) }
Output for 7.4.30
post is faster!diff: 0.031135082244873 array(2) { ["pre"]=> float(0.50190305709839) ["post"]=> float(0.47076797485352) }
Output for 7.4.29
pre is faster!diff: 0.0064160823822021 array(2) { ["pre"]=> float(0.50472784042358) ["post"]=> float(0.51114392280579) }
Output for 7.4.28
pre is faster!diff: 0.10061311721802 array(2) { ["pre"]=> float(0.4728798866272) ["post"]=> float(0.57349300384521) }
Output for 7.4.27
post is faster!diff: 0.0057258605957031 array(2) { ["pre"]=> float(0.4778139591217) ["post"]=> float(0.472088098526) }
Output for 7.4.26
post is faster!diff: 0.023760795593262 array(2) { ["pre"]=> float(0.50572800636292) ["post"]=> float(0.48196721076965) }
Output for 7.4.25
pre is faster!diff: 0.069501161575317 array(2) { ["pre"]=> float(0.47354602813721) ["post"]=> float(0.54304718971252) }
Output for 7.4.24
pre is faster!diff: 0.052815914154053 array(2) { ["pre"]=> float(0.46255421638489) ["post"]=> float(0.51537013053894) }
Output for 7.4.23
pre is faster!diff: 0.0082159042358398 array(2) { ["pre"]=> float(0.53167510032654) ["post"]=> float(0.53989100456238) }
Output for 7.4.22
pre is faster!diff: 0.0037860870361328 array(2) { ["pre"]=> float(0.49299788475037) ["post"]=> float(0.4967839717865) }
Output for 7.4.21
pre is faster!diff: 0.028946876525879 array(2) { ["pre"]=> float(0.53718209266663) ["post"]=> float(0.5661289691925) }
Output for 7.4.20
pre is faster!diff: 0.029222965240479 array(2) { ["pre"]=> float(0.47913098335266) ["post"]=> float(0.50835394859314) }
Output for 7.4.19
pre is faster!diff: 0.10297608375549 array(2) { ["pre"]=> float(0.48577880859375) ["post"]=> float(0.58875489234924) }
Output for 7.4.18
pre is faster!diff: 0.0064489841461182 array(2) { ["pre"]=> float(0.49346804618835) ["post"]=> float(0.49991703033447) }
Output for 7.4.16
pre is faster!diff: 0.052800178527832 array(2) { ["pre"]=> float(0.46933197975159) ["post"]=> float(0.52213215827942) }
Output for 7.4.15
pre is faster!diff: 0.035409212112427 array(2) { ["pre"]=> float(0.5354208946228) ["post"]=> float(0.57083010673523) }
Output for 7.4.14
pre is faster!diff: 0.076148986816406 array(2) { ["pre"]=> float(0.48220300674438) ["post"]=> float(0.55835199356079) }
Output for 7.4.13
pre is faster!diff: 0.019999742507935 array(2) { ["pre"]=> float(0.4593071937561) ["post"]=> float(0.47930693626404) }
Output for 7.4.12
pre is faster!diff: 0.065294981002808 array(2) { ["pre"]=> float(0.49294900894165) ["post"]=> float(0.55824398994446) }
Output for 7.4.11
post is faster!diff: 0.039598941802979 array(2) { ["pre"]=> float(0.53969097137451) ["post"]=> float(0.50009202957153) }
Output for 7.4.10
pre is faster!diff: 0.036693811416626 array(2) { ["pre"]=> float(0.45880508422852) ["post"]=> float(0.49549889564514) }
Output for 7.4.9
pre is faster!diff: 0.059540033340454 array(2) { ["pre"]=> float(0.49954891204834) ["post"]=> float(0.55908894538879) }
Output for 7.4.8
post is faster!diff: 0.02301287651062 array(2) { ["pre"]=> float(0.49401092529297) ["post"]=> float(0.47099804878235) }
Output for 7.4.7
pre is faster!diff: 0.031475067138672 array(2) { ["pre"]=> float(0.44576501846313) ["post"]=> float(0.47724008560181) }
Output for 7.4.6
post is faster!diff: 0.00014781951904297 array(2) { ["pre"]=> float(0.51516699790955) ["post"]=> float(0.5150191783905) }
Output for 7.4.5
pre is faster!diff: 0.032320022583008 array(2) { ["pre"]=> float(0.53755903244019) ["post"]=> float(0.56987905502319) }
Output for 7.4.4
post is faster!diff: 0.031548023223877 array(2) { ["pre"]=> float(0.50143599510193) ["post"]=> float(0.46988797187805) }
Output for 7.4.3
post is faster!diff: 0.01319408416748 array(2) { ["pre"]=> float(0.48464202880859) ["post"]=> float(0.47144794464111) }
Output for 7.4.2
post is faster!diff: 0.009289026260376 array(2) { ["pre"]=> float(0.48182511329651) ["post"]=> float(0.47253608703613) }
Output for 7.4.1
pre is faster!diff: 0.011435031890869 array(2) { ["pre"]=> float(0.46654987335205) ["post"]=> float(0.47798490524292) }
Output for 7.4.0
pre is faster!diff: 0.059908866882324 array(2) { ["pre"]=> float(0.45103716850281) ["post"]=> float(0.51094603538513) }
Output for 7.0.33
post is faster!diff: 0.029405832290649 array(2) { ["pre"]=> float(0.49400496482849) ["post"]=> float(0.46459913253784) }
Output for 7.0.0
post is faster!diff: 0.050335884094238 array(2) { ["pre"]=> float(0.50815081596375) ["post"]=> float(0.45781493186951) }
Output for 5.6.12
Warning: Unsupported declare 'strict_types' in /in/9BPqL on line 4 Parse error: syntax error, unexpected ':', expecting '{' in /in/9BPqL on line 11
Process exited with code 255.
preferences:
103.08 ms | 586 KiB | 5 Q