3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { public function __constructor() { $that = & $this; $that = new b(); var_dump('#1 that = '.get_class($that)); } public function change() { $that = & $this; $that = & new b(); var_dump('#2 that = '.get_class($that)); var_dump('#2 this = '.get_class($this)); } } class b { } $class = new a(); var_dump(get_class($class)); $class->change(); var_dump(get_class($class));

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)
5.6.280.0000.07721.08
5.6.210.0130.06020.70
5.6.200.0030.07318.24
5.6.190.0130.06020.50
5.6.180.4070.03720.34
5.6.170.0270.06720.62
5.6.160.0070.07320.55
5.6.150.0030.06318.18
5.6.140.0000.07018.14
5.6.130.0070.08718.28
5.6.120.0130.04721.00
5.6.110.0130.08320.98
5.6.100.0070.07320.99
5.6.90.0000.08020.98
5.6.80.0100.07720.40
5.6.70.0330.05320.38
5.5.350.0030.07320.41
5.5.340.0130.07317.95
5.5.330.0030.07720.41
5.5.320.0300.06720.40
5.5.310.0270.07720.25
5.5.300.0100.07717.95
5.5.290.0100.04718.07
5.5.280.0000.04720.81
5.5.270.0030.04720.89
5.5.260.0100.06720.90
5.5.250.0170.05720.66
5.5.240.0130.07320.25
5.4.450.1030.05719.61
5.4.440.0600.06719.60
5.4.430.0870.04019.19
5.4.420.0830.05319.46
5.4.410.0470.05719.06
5.4.400.0770.00018.83
5.4.390.0800.00018.53
5.4.380.0270.05718.75
5.4.370.0370.04718.78
5.4.360.0270.05318.59
5.4.350.0270.06018.59
5.4.340.0300.05718.75
5.4.320.0090.03312.51
5.4.310.0050.03812.51
5.4.300.0090.04212.51
5.4.290.0060.04612.50
5.4.280.0050.04012.40
5.4.270.0070.03512.40
5.4.260.0070.05718.96
5.4.250.0100.08018.73
5.4.240.0100.05318.89
5.4.230.0070.05318.92
5.4.220.0030.06318.73
5.4.210.0000.06318.79
5.4.200.0100.05018.92
5.4.190.0070.05019.04
5.4.180.0170.07318.94
5.4.170.0100.05318.89
5.4.160.0070.05318.91
5.4.150.0100.05318.81
5.4.140.0030.06016.55
5.4.130.0030.05716.40
5.4.120.0070.05016.64
5.4.110.0130.04316.48
5.4.100.0070.05016.41
5.4.90.0100.06316.53
5.4.80.0170.04716.43
5.4.70.0170.04316.45
5.4.60.0170.06016.45
5.4.50.0070.04716.44
5.4.40.0070.05016.49
5.4.30.0200.05716.61
5.4.20.0070.05316.48
5.4.10.0070.05016.57
5.4.00.0130.05015.84
5.3.290.0080.04112.80
5.3.280.0070.05314.62
5.3.270.0070.05314.66
5.3.260.0030.07714.63
5.3.250.0100.04714.44
5.3.240.0100.07314.61
5.3.230.0130.04314.74
5.3.220.0130.05714.80
5.3.210.0030.06014.76
5.3.200.0070.05014.66
5.3.190.0100.06014.64
5.3.180.0130.05314.73
5.3.170.0070.05014.59
5.3.160.0030.07014.65
5.3.150.0070.05014.57
5.3.140.0030.05714.58
5.3.130.0070.05714.72
5.3.120.0030.05714.56
5.3.110.0030.05314.61
5.3.100.0100.04714.28
5.3.90.0100.05714.20
5.3.80.0130.04313.86
5.3.70.0130.04314.11
5.3.60.0070.05014.09
5.3.50.0170.04013.86
5.3.40.0130.05314.12
5.3.30.0070.04713.92
5.3.20.0030.05013.53
5.3.10.0100.04313.64
5.3.00.0030.05013.71
5.2.170.0100.03711.31
5.2.160.0070.03711.32
5.2.150.0000.04711.10
5.2.140.0100.04011.22
5.2.130.0030.04311.08
5.2.120.0100.03311.27
5.2.110.0100.03311.11
5.2.100.0070.03711.27
5.2.90.0000.04311.01
5.2.80.0000.04710.93
5.2.70.0130.03311.32
5.2.60.0030.04311.13
5.2.50.0000.04310.94
5.2.40.0000.04311.09
5.2.30.0100.03711.20
5.2.20.0030.04311.03
5.2.10.0070.03310.84
5.2.00.0070.04010.71
5.1.60.0100.03010.10
5.1.50.0030.0379.96
5.1.40.0100.03010.18
5.1.30.0030.03710.41
5.1.20.0070.04010.44
5.1.10.0000.03710.08
5.1.00.0100.03010.07
5.0.50.0030.0308.64
5.0.40.0000.0308.47
5.0.30.0100.0338.06
5.0.20.0070.0308.29
5.0.10.0030.0278.25
5.0.00.0030.0578.14
4.4.90.0000.0236.09
4.4.80.0000.0236.09
4.4.70.0030.0206.09
4.4.60.0000.0236.09
4.4.50.0000.0236.09
4.4.40.0070.0306.09
4.4.30.0100.0206.09
4.4.20.0030.0236.09
4.4.10.0030.0206.09
4.4.00.0000.0376.09
4.3.110.0030.0276.09
4.3.100.0000.0236.09
4.3.90.0030.0206.09
4.3.80.0000.0336.09
4.3.70.0030.0206.09
4.3.60.0070.0176.09
4.3.50.0070.0176.09
4.3.40.0000.0336.09
4.3.30.0000.0236.09
4.3.20.0030.0276.09
4.3.10.0000.0236.09
4.3.00.0100.0234.76

preferences:
140.31 ms | 1394 KiB | 7 Q