3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 0; $b = &$a; $c = &$b; var_dump($a, $b, $c); echo("\n\n"); $c = 1; var_dump($a, $b, $c); echo("\n\n"); $b = 2; var_dump($a, $b, $c); echo("\n\n"); $b = 3; var_dump($a, $b, $c); echo("\n\n"); $a = &$c; var_dump($a, $b, $c); echo("\n\n");

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)
8.3.60.0160.00018.43
8.3.50.0070.01021.93
8.3.40.0110.00418.75
8.3.30.0100.00319.03
8.3.20.0050.00320.34
8.3.10.0040.00421.96
8.3.00.0040.00422.43
8.2.180.0120.00316.38
8.2.170.0070.00722.96
8.2.160.0130.00322.26
8.2.150.0000.00824.18
8.2.140.0000.00824.66
8.2.130.0100.00326.16
8.2.120.0040.00419.48
8.2.110.0060.00322.16
8.2.100.0100.00319.45
8.2.90.0040.00419.21
8.2.80.0030.00618.04
8.2.70.0000.00817.63
8.2.60.0000.01017.68
8.2.50.0050.00318.07
8.2.40.0050.00317.91
8.2.30.0050.00517.98
8.2.20.0000.00717.57
8.2.10.0040.00417.49
8.2.00.0030.00617.71
8.1.280.0070.01125.92
8.1.270.0050.00322.19
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0050.00323.82
8.1.230.0040.00719.16
8.1.220.0040.00417.74
8.1.210.0040.00718.77
8.1.200.0060.00317.23
8.1.190.0000.00817.41
8.1.180.0040.00418.10
8.1.170.0040.00418.57
8.1.160.0050.00321.91
8.1.150.0000.00718.50
8.1.140.0000.00817.38
8.1.130.0070.00017.78
8.1.120.0000.00717.32
8.1.110.0030.00317.38
8.1.100.0030.00317.45
8.1.90.0040.00417.38
8.1.80.0070.00017.41
8.1.70.0070.00017.26
8.1.60.0000.00817.44
8.1.50.0040.00417.36
8.1.40.0040.00417.50
8.1.30.0040.00417.52
8.1.20.0040.00417.69
8.1.10.0000.00717.45
8.1.00.0000.00817.45
8.0.300.0000.00718.77
8.0.290.0040.00417.18
8.0.280.0040.00418.32
8.0.270.0030.00317.26
8.0.260.0030.00316.73
8.0.250.0020.00516.88
8.0.240.0000.00716.84
8.0.230.0040.00416.84
8.0.220.0030.00316.74
8.0.210.0000.00816.73
8.0.200.0030.00316.91
8.0.190.0030.00516.84
8.0.180.0050.00216.85
8.0.170.0070.00016.85
8.0.160.0040.00416.79
8.0.150.0000.00716.79
8.0.140.0060.00316.69
8.0.130.0060.00013.28
8.0.120.0030.00616.84
8.0.110.0070.00016.68
8.0.100.0070.00016.68
8.0.90.0050.00216.67
8.0.80.0110.00416.77
8.0.70.0040.00416.65
8.0.60.0030.00516.70
8.0.50.0030.00516.81
8.0.30.0150.00716.77
8.0.20.0100.01117.40
8.0.10.0040.00416.74
8.0.00.0140.00816.74
7.4.330.0060.00015.03
7.4.320.0040.00416.58
7.4.300.0050.00216.29
7.4.290.0030.00316.43
7.4.280.0040.00416.52
7.4.270.0030.00516.41
7.4.260.0080.00316.53
7.4.250.0070.00016.31
7.4.240.0020.00516.40
7.4.230.0030.00316.52
7.4.220.0100.00716.49
7.4.210.0070.01116.52
7.4.200.0040.00416.32
7.4.190.0000.00716.39
7.4.160.0080.00816.42
7.4.150.0110.00717.40
7.4.140.0110.00717.86
7.4.130.0110.00716.56
7.4.120.0030.01416.49
7.4.110.0110.00616.33
7.4.100.0090.00916.44
7.4.90.0090.00816.32
7.4.80.0120.00319.39
7.4.70.0130.00616.54
7.4.60.0120.00416.43
7.4.50.0030.00616.52
7.4.40.0090.00322.77
7.4.30.0120.00916.43
7.4.00.0060.00914.65
7.3.330.0060.00013.05
7.3.320.0030.00312.83
7.3.310.0000.00716.14
7.3.300.0060.00016.18
7.3.290.0040.01216.17
7.3.280.0090.00916.18
7.3.270.0180.00017.40
7.3.260.0060.01116.28
7.3.250.0060.01116.28
7.3.240.0110.00716.28
7.3.230.0090.00916.39
7.3.210.0090.00916.53
7.3.200.0150.00619.39
7.3.190.0150.00616.42
7.3.180.0110.00716.36
7.3.170.0070.00716.32
7.3.160.0110.00716.20
7.3.120.0100.00714.89
7.2.330.0150.00316.26
7.2.320.0070.01816.50
7.2.310.0140.00316.64
7.2.300.0030.01516.51
7.2.290.0060.01016.60
7.2.60.0030.01016.64
7.2.00.0030.01419.30
7.1.200.0000.01315.46
7.1.100.0040.00718.21
7.1.70.0000.01117.13
7.1.60.0070.00417.22
7.1.50.0150.00916.71
7.1.00.0070.07022.54
7.0.200.0100.00716.70
7.0.140.0100.06322.04
7.0.60.0000.04719.93
7.0.50.0030.04017.84
7.0.40.0070.04020.40
7.0.30.0270.07020.18
7.0.20.0270.06320.09
7.0.10.0070.04020.16
7.0.00.0130.06319.99
5.6.280.0000.07320.90
5.6.210.0070.06020.76
5.6.200.0130.07318.09
5.6.190.0100.08720.61
5.6.180.0330.08320.61
5.6.170.0200.04020.48
5.6.160.0100.05320.40
5.6.150.0100.07718.18
5.6.140.0000.06018.16
5.6.130.0030.05318.16
5.6.120.0070.07020.99
5.6.110.0070.06320.98
5.6.100.0100.08020.97
5.6.90.0100.06321.11
5.6.80.0100.04720.38
5.5.350.4330.04320.39
5.5.340.0100.08017.97
5.5.330.0000.05320.19
5.5.320.0100.08020.41
5.5.310.0230.04720.29
5.5.300.0030.08317.91
5.5.290.0070.07717.91
5.5.280.0130.07720.96
5.5.270.0130.08020.77
5.5.260.0000.04720.84
5.5.250.0070.08020.58
5.5.240.0070.02720.03
5.4.450.0270.07319.64
5.4.440.1130.07319.37
5.4.430.1130.06019.61
5.4.420.1000.07019.40
5.4.410.0670.05718.95
5.4.400.0970.05719.20
5.4.390.1230.07719.26
5.4.380.0270.05018.72
5.4.370.0170.05018.50
5.4.360.0070.06018.64
5.4.350.0170.05318.78
5.4.340.0200.04718.71
5.4.320.0070.04312.45
5.4.310.0090.05012.45
5.4.300.0100.04912.45
5.4.290.0040.03912.45
5.4.280.0100.03812.35
5.4.270.0100.06318.80
5.4.260.0100.05718.65
5.4.250.0170.07018.92
5.4.240.0100.05719.02
5.4.230.0100.05018.95
5.4.220.0070.06318.73
5.4.210.0200.06318.70
5.4.200.0170.07018.74
5.4.190.0130.05018.99
5.4.180.0230.05018.89
5.4.170.0100.06718.74
5.4.160.0170.06318.66
5.4.150.0200.06318.99
5.4.140.0000.07716.42
5.4.130.0070.06716.29
5.4.120.0030.05316.48
5.4.110.0100.06016.46
5.4.100.0170.05016.30
5.4.90.0100.06716.41
5.4.80.0100.04716.35
5.4.70.0000.05716.43
5.4.60.0170.06316.48
5.4.50.0170.05016.32
5.4.40.0100.06316.45
5.4.30.0100.04716.52
5.4.20.0070.04716.24
5.4.10.0070.05016.27
5.4.00.0230.03715.68
5.3.290.0060.03912.80
5.3.280.0100.05314.75
5.3.270.0100.07314.60
5.3.260.0130.05714.61
5.3.250.0170.06714.62
5.3.240.0070.07314.52
5.3.230.0230.04314.62
5.3.220.0100.07014.61
5.3.210.0130.05314.34
5.3.200.0170.05314.57
5.3.190.0130.05014.34
5.3.180.0130.04714.57
5.3.170.0100.05014.56
5.3.160.0030.05314.56
5.3.150.0030.06014.43
5.3.140.0100.06714.56
5.3.130.0130.05314.54
5.3.120.0070.05314.56
5.3.110.0230.04014.64
5.3.100.0200.04314.05
5.3.90.0000.06314.03
5.3.80.0000.05713.86
5.3.70.0130.05713.85
5.3.60.0200.04314.01
5.3.50.0070.06713.94
5.3.40.0100.05013.95
5.3.30.0030.08013.92
5.3.20.0030.06013.52
5.3.10.0070.05713.51
5.3.00.0030.07313.68
5.2.170.0170.04711.29
5.2.160.0030.05711.14
5.2.150.0100.03711.14
5.2.140.0130.04711.24
5.2.130.0130.03311.25
5.2.120.0170.03311.11
5.2.110.0170.03011.11
5.2.100.0070.04310.93
5.2.90.0070.05711.20
5.2.80.0100.05311.11
5.2.70.0100.04011.18
5.2.60.0030.04310.95
5.2.50.0100.04010.95
5.2.40.0170.04011.11
5.2.30.0070.05010.98
5.2.20.0030.04310.89
5.2.10.0070.04010.87
5.2.00.0000.06710.87
5.1.60.0070.04710.14
5.1.50.0100.0439.91
5.1.40.0070.0439.89
5.1.30.0100.03010.41
5.1.20.0200.03710.29
5.1.10.0070.03310.09
5.1.00.0100.0339.95
5.0.50.0070.0378.57
5.0.40.0100.0238.60
5.0.30.0100.0438.36
5.0.20.0000.0438.18
5.0.10.0000.0338.15
5.0.00.0100.0438.08
4.4.90.0000.0237.17
4.4.80.0070.0277.17
4.4.70.0000.0237.18
4.4.60.0030.0237.18
4.4.50.0030.0237.18
4.4.40.0030.0407.18
4.4.30.0030.0237.18
4.4.20.0070.0207.18
4.4.10.0100.0237.18
4.4.00.0030.0407.18
4.3.110.0130.0237.18
4.3.100.0000.0237.18
4.3.90.0070.0207.18
4.3.80.0000.0377.18
4.3.70.0070.0177.18
4.3.60.0000.0307.18
4.3.50.0030.0237.18
4.3.40.0030.0337.18
4.3.30.0030.0207.18
4.3.20.0070.0207.18
4.3.10.0000.0237.18
4.3.00.0070.0208.13

preferences:
40.77 ms | 401 KiB | 5 Q