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run code in 300+ PHP versions simultaneously
<?php declare(strict_types = 1); $n = "5281"; // checking the first byte is enough //---------------------------------------------------------------------------------------- $st = microtime(TRUE); for($i = 0; $i < 1000000; $i++){ $x = is_numeric($n); } echo number_format(microtime(TRUE) - $st, 10) . "\n"; //---------------------------------------------------------------------------------------- $st = microtime(TRUE); for($i = 0; $i < 1000000; $i++){ $x = is_numeric($n[0]); // check only the first byte - makes it a bit slower tho } echo number_format(microtime(TRUE) - $st, 10) . "\n"; //---------------------------------------------------------------------------------------- $digits = [ 0 => TRUE, 1 => TRUE, 2 => TRUE, 3 => TRUE, 4 => TRUE, 5 => TRUE, 6 => TRUE, 7 => TRUE, 8 => TRUE, 9 => TRUE ]; $st = microtime(TRUE); for($i = 0; $i < 1000000; $i++){ $x = isset($digits[$n[0]]); // fastest solution } echo number_format(microtime(TRUE) - $st, 10) . "\n"; //---------------------------------------------------------------------------------------- $st = microtime(TRUE); for($i = 0; $i < 1000000; $i++){ $x = (String)(Int)$n[0] === $n[0]; // slowest solution } echo number_format(microtime(TRUE) - $st, 10) . "\n";
Output for 7.2.11
0.0425710678 0.0537748337 0.0408380032 0.0978660583
Output for 7.2.10
0.0471370220 0.0580708981 0.0546278954 0.0740480423
Output for 7.2.9
0.0576469898 0.0472950935 0.0391309261 0.0742149353
Output for 7.2.8
0.0369768143 0.0390970707 0.0329811573 0.1401009560
Output for 7.2.7
0.0745518208 0.0723350048 0.0610809326 0.1687948704
Output for 7.2.6
0.0612699986 0.0648500919 0.0641849041 0.1024589539
Output for 7.2.5
0.0661420822 0.0428290367 0.0490570068 0.1320278645
Output for 7.2.4
0.0695121288 0.0759010315 0.0663371086 0.1509680748
Output for 7.2.3
0.0693240166 0.0712301731 0.0417840481 0.0868208408
Output for 7.2.2
0.0527751446 0.0384259224 0.0320770741 0.0669069290
Output for 7.2.1
0.0442001820 0.0866911411 0.0501978397 0.1289720535
Output for 7.2.0
0.0558681488 0.0658879280 0.0501389503 0.1068720818
Output for 7.1.23
0.1651659012 0.1255791187 0.0605220795 0.2098770142
Output for 7.1.22
0.0926079750 0.0486230850 0.0440208912 0.1425039768
Output for 7.1.21
0.0420291424 0.1059238911 0.0704560280 0.1925098896
Output for 7.1.20
0.0534679890 0.0526409149 0.0448698997 0.1023781300
Output for 7.1.19
0.0401959419 0.0659711361 0.0404458046 0.1354439259
Output for 7.1.18
0.0518839359 0.0537629128 0.0446760654 0.1111910343
Output for 7.1.17
0.0456120968 0.0474619865 0.0591690540 0.1228120327
Output for 7.1.16
0.0512468815 0.0463929176 0.0489470959 0.1472220421
Output for 7.1.15
0.0506179333 0.0935409069 0.0680770874 0.1456000805
Output for 7.1.14
0.0810198784 0.0482079983 0.0538749695 0.0980010033
Output for 7.1.13
0.0691709518 0.0498328209 0.0518000126 0.1545550823
Output for 7.1.12
0.0709831715 0.0686528683 0.0386450291 0.1354160309
Output for 7.1.11
0.0955891609 0.1045639515 0.0751371384 0.2185959816
Output for 7.1.10
0.0436530113 0.0627059937 0.0411541462 0.1585669518
Output for 7.1.9
0.1040079594 0.0922529697 0.0565359592 0.1259889603
Output for 7.1.8
0.0452001095 0.0591049194 0.0419399738 0.1553230286
Output for 7.1.7
0.0441210270 0.0480980873 0.0382490158 0.1151769161
Output for 7.1.6
0.0836651325 0.0441291332 0.0409309864 0.0909721851
Output for 7.1.5
0.0670080185 0.0497519970 0.0346131325 0.1345188618
Output for 7.1.4
0.0571939945 0.0591228008 0.0346679688 0.0846650600
Output for 7.1.3
0.0401849747 0.0498540401 0.0343508720 0.1411998272
Output for 7.1.2
0.0657250881 0.1120631695 0.0435461998 0.1096620560
Output for 7.1.1
0.0416660309 0.0518560410 0.0408999920 0.1030328274
Output for 7.1.0
0.1363220215 0.0915091038 0.0625941753 0.1205267906
Output for 5.6.38
Warning: Unsupported declare 'strict_types' in /in/RGKJk on line 1 0.1574451923 0.2287278175 0.1279459000 0.4210197926
preferences:
76.79 ms | 401 KiB | 42 Q