3v4l.org

run code in 300+ PHP versions simultaneously
<?php $z1 = "abc"; $out = ""; for ($i = 0; $i < strlen($z1); $i++) { $out[$i] = $z1[$i]; // $out = $out.$z1[$i]; } //print_r ($out); eco $out;

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
5.5.120.0030.08717.40
5.5.110.0030.05017.33
5.5.100.0030.05017.18
5.5.90.0030.04317.27
5.5.80.0130.04017.20
5.5.70.0070.07017.16
5.5.60.0030.05017.23
5.5.50.0000.05017.21
5.5.40.0030.06317.15
5.5.30.0100.07017.32
5.5.20.0130.06017.18
5.5.10.0130.07017.19
5.5.00.0000.09017.15
5.4.280.0070.08019.03
5.4.270.0070.07018.95
5.4.260.0030.08019.08
5.4.250.0100.06318.88
5.4.240.0130.04019.01
5.4.230.0130.07019.00
5.4.220.0130.06319.04
5.4.210.0030.05319.00
5.4.200.0100.03319.07
5.4.190.0100.07019.09
5.4.180.0070.07319.11
5.4.170.0100.06019.09
5.4.160.0030.07718.97
5.4.150.0130.06319.13
5.4.140.0000.05316.58
5.4.130.0130.05716.29
5.4.120.0000.04016.35
5.4.110.0030.07716.43
5.4.100.0100.07016.32
5.4.90.0000.06316.43
5.4.80.0030.06316.39
5.4.70.0070.03316.37
5.4.60.0170.06716.28
5.4.50.0030.07016.18
5.4.40.0070.04716.36
5.4.30.0030.04716.35
5.4.20.0030.03716.29
5.4.10.0100.07716.39
5.4.00.0070.07015.88
5.3.280.0130.06014.59
5.3.270.0030.05314.57
5.3.260.0130.07014.57
5.3.250.0130.07014.55
5.3.240.0070.06714.55
5.3.230.0070.07014.58
5.3.220.0030.04014.55
5.3.210.0070.06314.52
5.3.200.0070.03714.43
5.3.190.0130.04714.54
5.3.180.0070.07714.48
5.3.170.0070.05014.54
5.3.160.0070.06014.54
5.3.150.0070.08014.52
5.3.140.0070.05314.50
5.3.130.0100.03314.53
5.3.120.0030.04014.63
5.3.110.0030.04014.38
5.3.100.0100.04013.89
5.3.90.0170.05013.96
5.3.80.0070.06013.95
5.3.70.0100.04313.95
5.3.60.0100.06313.95
5.3.50.0170.06713.70
5.3.40.0070.07013.89
5.3.30.0100.03313.68
5.3.20.0000.07713.71
5.3.10.0070.04713.73
5.3.00.0100.06713.58
5.2.170.0030.04011.04
5.2.160.0130.03311.09
5.2.150.0070.05711.11
5.2.140.0030.04010.97
5.2.130.0030.06010.89
5.2.120.0070.04711.08
5.2.110.0030.04310.92
5.2.100.0100.05710.93
5.2.90.0070.06011.07
5.2.80.0070.06311.01
5.2.70.0030.05311.23
5.2.60.0000.05711.00
5.2.50.0030.06711.03
5.2.40.0130.05010.98
5.2.30.0070.05710.96
5.2.20.0070.06010.99
5.2.10.0000.03010.77
5.2.00.0000.03010.71
5.1.60.0000.02710.14
5.1.50.0070.0209.95
5.1.40.0030.02310.00
5.1.30.0030.02310.36
5.1.20.0000.03010.30
5.1.10.0030.02710.13
5.1.00.0000.02710.04
5.0.50.0070.0138.53
5.0.40.0030.0408.43
5.0.30.0000.0478.25
5.0.20.0070.0438.26
5.0.10.0030.0438.26
5.0.00.0070.0608.14
4.4.90.0000.0307.77
4.4.80.0100.0207.77
4.4.70.0070.0337.77
4.4.60.0000.0237.77
4.4.50.0030.0207.77
4.4.40.0000.0237.77
4.4.30.0000.0177.77
4.4.20.0030.0137.77
4.4.10.0030.0137.77
4.4.00.0000.0237.77
4.3.110.0000.0277.77
4.3.100.0030.0237.77
4.3.90.0000.0207.77
4.3.80.0000.0407.77
4.3.70.0000.0277.77
4.3.60.0000.0137.77
4.3.50.0000.0177.77
4.3.40.0000.0237.77
4.3.30.0000.0137.77
4.3.20.0000.0177.77
4.3.10.0030.0137.77
4.3.00.0000.0137.77

preferences:
140.99 ms | 1394 KiB | 7 Q