3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = str_repeat('foo', 500000); $y = 'bar'; $before = microtime(1); $x . $y; printf('%f'."\n", microtime(1) - $before); $x = str_repeat('foo', 500000); $y = 'bar'; $before = microtime(1); $x .= $y; printf('%f'."\n", microtime(1) - $before);
Output for 7.2.0
0.000273 0.000001
Output for 7.1.7
0.000267 0.000005
Output for 7.1.6
0.000633 0.000008
Output for 7.1.5
0.462053 0.000009
Output for 7.1.0
0.000361 0.000001
Output for 7.0.20
0.003305 0.000008
Output for 7.0.14
0.000365 0.000001
Output for 7.0.10
0.001280 0.000001
Output for 7.0.9
0.000985 0.000001
Output for 7.0.8
0.001205 0.000001
Output for 7.0.7
0.000958 0.000001
Output for 7.0.6
0.001023 0.000001
Output for 7.0.5
0.001084 0.000001
Output for 7.0.4
0.000466 0.000001
Output for 7.0.3
0.000477 0.000001
Output for 5.5.9, 7.0.2
0.000513 0.000001
Output for 7.0.1
0.000438 0.000001
Output for 7.0.0
0.000480 0.000001
Output for 5.6.28
0.000625 0.000002
Output for 5.6.25
0.000907 0.000002
Output for 5.6.24
0.000758 0.000001
Output for 5.6.23
0.000902 0.000002
Output for 5.6.22
0.000587 0.000001
Output for 5.6.21
0.000791 0.000002
Output for 5.6.20
0.000762 0.000001
Output for 5.6.19
0.000698 0.000001
Output for 5.6.18
0.000835 0.000001
Output for 5.6.17
0.000736 0.000001
Output for 5.6.16
0.000856 0.000002
Output for 5.6.15
0.001009 0.000002
Output for 5.6.14
0.000790 0.000002
Output for 5.6.13
0.000645 0.000002
Output for 5.6.12
0.000846 0.000001
Output for 5.6.11
0.000928 0.000002
Output for 5.6.10
0.000821 0.000002
Output for 5.6.9
0.000791 0.000001
Output for 5.6.8
0.000832 0.000002
Output for 5.6.7
0.000873 0.000002
Output for 5.6.6
0.000890 0.000003
Output for 5.6.5
0.000818 0.000001
Output for 5.6.4
0.000739 0.000002
Output for 5.6.3
0.000561 0.000001
Output for 5.6.2
0.000559 0.000001
Output for 5.6.1
0.000518 0.000001
Output for 5.6.0
0.000573 0.000001
Output for 5.5.38
0.000900 0.000002
Output for 5.5.37
0.000670 0.000002
Output for 5.5.36
0.000871 0.000002
Output for 5.5.35
0.000548 0.000002
Output for 5.5.34
0.000780 0.000002
Output for 5.5.33
0.000853 0.000001
Output for 5.5.32
0.000760 0.000002
Output for 5.5.21, 5.5.27, 5.5.31
0.000778 0.000002
Output for 5.5.30
0.000665 0.000001
Output for 5.5.29
0.000894 0.000002
Output for 5.2.11, 5.5.28
0.000781 0.000001
Output for 5.5.26
0.000920 0.000002
Output for 5.5.25
0.000695 0.000001
Output for 5.5.24
0.000824 0.000001
Output for 5.5.23
0.000866 0.000001
Output for 5.5.22
0.000816 0.000001
Output for 5.5.20
0.000563 0.000001
Output for 5.5.19
0.000568 0.000001
Output for 5.5.18
0.000534 0.000001
Output for 5.5.16
0.000501 0.000001
Output for 5.5.15
0.000514 0.000001
Output for 5.5.14
0.000652 0.000001
Output for 5.5.13
0.000508 0.000001
Output for 5.5.12
0.000797 0.000001
Output for 5.5.11
0.000621 0.000001
Output for 5.5.10
0.000625 0.000001
Output for 5.5.8
0.000499 0.000001
Output for 5.5.7
0.000500 0.000001
Output for 5.5.6
0.000648 0.000002
Output for 5.5.5
0.000592 0.000001
Output for 5.5.4
0.000594 0.000001
Output for 5.3.27, 5.3.29, 5.5.3
0.000503 0.000001
Output for 5.5.2
0.000626 0.000001
Output for 5.5.1
0.000507 0.000001
Output for 5.4.11, 5.5.0
0.000502 0.000001
Output for 5.4.45
0.000829 0.000001
Output for 5.4.44
0.000917 0.000002
Output for 5.4.43
0.000822 0.000001
Output for 5.4.42
0.000759 0.000001
Output for 5.4.41
0.000844 0.000001
Output for 5.4.40
0.000807 0.000002
Output for 5.4.39
0.000781 0.000002
Output for 5.4.38
0.000892 0.000002
Output for 5.4.37
0.000864 0.000002
Output for 5.4.36
0.000702 0.000001
Output for 5.4.35
0.000725 0.000001
Output for 5.4.24, 5.4.34
0.000504 0.000001
Output for 5.3.24, 5.4.22, 5.4.32
0.000506 0.000001
Output for 5.4.31
0.000516 0.000001
Output for 5.4.30
0.000537 0.000000
Output for 5.4.29
0.000588 0.000001
Output for 5.4.28
0.000521 0.000001
Output for 5.4.27
0.000706 0.000001
Output for 5.4.26
0.000553 0.000001
Output for 5.4.25
0.000507 0.000000
Output for 5.4.23
0.000602 0.000001
Output for 5.4.14, 5.4.21
0.000512 0.000001
Output for 5.4.20
0.000648 0.000001
Output for 5.4.19
0.000562 0.000001
Output for 5.4.18
0.000505 0.000001
Output for 5.4.17
0.000503 0.000000
Output for 5.4.16
0.000610 0.000001
Output for 5.4.15
0.000536 0.000001
Output for 5.4.13
0.000512 0.000000
Output for 5.4.12
0.000745 0.000001
Output for 5.4.10
0.000691 0.000001
Output for 5.4.9
0.000775 0.000002
Output for 5.4.8
0.000947 0.000002
Output for 5.4.7
0.000912 0.000001
Output for 5.4.6
0.000800 0.000002
Output for 5.4.5
0.000757 0.000002
Output for 5.4.4
0.000857 0.000001
Output for 5.4.3
0.000823 0.000001
Output for 5.4.2
0.000820 0.000002
Output for 5.4.1
0.000817 0.000002
Output for 5.4.0
0.000859 0.000001
Output for 5.3.28
0.000498 0.000000
Output for 5.3.26
0.000564 0.000002
Output for 5.3.25
0.000599 0.000001
Output for 5.3.23
0.000500 0.000000
Output for 5.3.22
0.000590 0.000001
Output for 5.3.21
0.000504 0.000000
Output for 5.3.20
0.000520 0.000001
Output for 5.3.19
0.000828 0.000001
Output for 5.3.18
0.000826 0.000002
Output for 5.3.17
0.000878 0.000002
Output for 5.3.16
0.000793 0.000001
Output for 5.3.15
0.000918 0.000002
Output for 5.3.14
0.000785 0.000002
Output for 5.3.13
0.000620 0.000001
Output for 5.3.6, 5.3.12
0.000790 0.000001
Output for 5.3.11
0.000764 0.000001
Output for 5.3.10
0.000838 0.000001
Output for 5.3.9
0.000811 0.000001
Output for 5.3.8
0.000858 0.000001
Output for 5.3.7
0.000785 0.000001
Output for 5.3.5
0.000817 0.000001
Output for 5.3.4
0.000649 0.000001
Output for 5.3.3
0.000874 0.000001
Output for 5.3.2
0.000589 0.000001
Output for 5.2.0, 5.3.1
0.000860 0.000001
Output for 5.3.0
0.000907 0.000001
Output for 5.2.17
0.000929 0.000001
Output for 5.2.16
0.000869 0.000002
Output for 5.2.15
0.000825 0.000002
Output for 5.2.14
0.001005 0.000002
Output for 5.2.13
0.000576 0.000001
Output for 5.2.12
0.000970 0.000001
Output for 5.2.10
0.000953 0.000002
Output for 5.2.9
0.000897 0.000001
Output for 5.2.8
0.000915 0.000002
Output for 5.2.7
0.000890 0.000002
Output for 5.2.6
0.000739 0.000001
Output for 5.2.5
0.000920 0.000001
Output for 5.2.4
0.000981 0.000002
Output for 5.2.3
0.000720 0.000001
Output for 5.2.2
0.000986 0.000002
Output for 5.2.1
0.000707 0.000001
Output for 5.1.6
0.000973 0.000002
Output for 5.1.5
0.000992 0.000001
Output for 5.1.4
0.000956 0.000002
Output for 5.1.3
0.000899 0.000002
Output for 5.1.2
0.000996 0.000002
Output for 5.1.1
0.000834 0.000001
Output for 5.1.0
0.000935 0.000002
Output for 5.0.5
0.001034 0.000003
Output for 5.0.4
0.001100 0.000002
Output for 5.0.3
0.000829 0.000002
Output for 5.0.2
0.000942 0.000002
Output for 5.0.1
0.001020 0.000002
Output for 5.0.0
0.000937 0.000002
Output for 4.4.9
0.001033 0.000004
Output for 4.4.8
0.001047 0.000004
Output for 4.4.7
0.001072 0.000005
Output for 4.4.6
0.001081 0.000005
Output for 4.4.5
0.001077 0.000005
Output for 4.4.4
0.001065 0.000004
Output for 4.4.3
0.001005 0.000004
Output for 4.4.2
0.001061 0.000004
Output for 4.4.1
0.001027 0.000004
Output for 4.4.0
0.000762 0.000002
Output for 4.3.11
0.000757 0.000003
Output for 4.3.10
0.000825 0.000004
Output for 4.3.9
0.000980 0.000005
Output for 4.3.8
0.000967 0.000006
Output for 4.3.7
0.001031 0.000006
Output for 4.3.6
0.001059 0.000005
Output for 4.3.5
0.000951 0.000004
Output for 4.3.4
0.000988 0.000004
Output for 4.3.3
0.001023 0.000005
Output for 4.3.2
0.000683 0.000003
Output for 4.3.1
0.001076 0.000005
Output for 4.3.0
0.000962 0.000005

preferences:
176.55 ms | 401 KiB | 216 Q