3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = null; $name = 'foo'; var_dump(array($$name)); var_dump(array(&$$name));

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)
8.3.40.0110.00418.67
8.3.30.0100.00318.91
8.3.20.0080.00020.13
8.3.10.0040.00422.09
8.3.00.0040.00422.46
8.2.170.0110.00322.96
8.2.160.0120.00319.16
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00819.36
8.2.110.0090.00019.23
8.2.100.0110.00017.78
8.2.90.0000.00819.35
8.2.80.0050.00317.97
8.2.70.0040.00417.63
8.2.60.0080.00018.04
8.2.50.0030.00518.07
8.2.40.0040.00419.88
8.2.30.0000.00718.05
8.2.20.0020.00517.72
8.2.10.0000.00717.73
8.2.00.0070.00017.73
8.1.270.0030.00622.19
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0060.00321.43
8.1.230.0070.00417.45
8.1.220.0060.00317.74
8.1.210.0040.00418.77
8.1.200.0030.00617.10
8.1.190.0040.00417.22
8.1.180.0040.00418.69
8.1.170.0070.00318.36
8.1.160.0030.00322.12
8.1.150.0040.00418.53
8.1.140.0030.00517.55
8.1.130.0000.00717.88
8.1.120.0000.00717.50
8.1.110.0000.00717.38
8.1.100.0040.00417.40
8.1.90.0050.00317.35
8.1.80.0000.00717.41
8.1.70.0040.00417.39
8.1.60.0030.00617.58
8.1.50.0040.00417.54
8.1.40.0000.00817.52
8.1.30.0000.00817.51
8.1.20.0020.00517.64
8.1.10.0040.00417.50
8.1.00.0060.00317.32
8.0.300.0000.00718.77
8.0.290.0040.00416.63
8.0.280.0000.00718.48
8.0.270.0070.00017.29
8.0.260.0080.00016.70
8.0.250.0000.00816.96
8.0.240.0050.00216.88
8.0.230.0030.00316.82
8.0.220.0000.00716.74
8.0.210.0000.00716.81
8.0.200.0040.00416.77
8.0.190.0040.00416.91
8.0.180.0030.00316.93
8.0.170.0040.00416.79
8.0.160.0050.00216.93
8.0.150.0040.00416.81
8.0.140.0030.00316.86
8.0.130.0000.00513.33
8.0.120.0030.00516.70
8.0.110.0000.00816.83
8.0.100.0000.00716.89
8.0.90.0040.00416.83
8.0.80.0030.01716.94
8.0.70.0040.00416.68
8.0.60.0070.00016.95
8.0.50.0040.00416.87
8.0.30.0120.00717.05
8.0.20.0090.00917.40
8.0.10.0070.00016.96
8.0.00.0170.00816.71
7.4.330.0040.00315.00
7.4.320.0000.00616.58
7.4.300.0030.00316.50
7.4.290.0030.00316.38
7.4.280.0040.00416.57
7.4.270.0040.00416.54
7.4.260.0040.00416.43
7.4.250.0040.00416.50
7.4.240.0020.00516.45
7.4.230.0000.00716.69
7.4.220.0060.01116.70
7.4.210.0050.00816.55
7.4.200.0040.00416.61
7.4.190.0000.00816.36
7.4.160.0100.00716.31
7.4.150.0030.02117.40
7.4.140.0120.00717.86
7.4.130.0120.00516.46
7.4.120.0140.00316.46
7.4.110.0090.00916.41
7.4.100.0110.00616.44
7.4.90.0070.01016.64
7.4.80.0130.00919.39
7.4.70.0060.01016.29
7.4.60.0060.01016.64
7.4.50.0030.00516.29
7.4.40.0060.00922.77
7.4.30.0110.00516.46
7.4.00.0100.00714.84
7.3.330.0080.00013.05
7.3.320.0030.00313.26
7.3.310.0030.00316.32
7.3.300.0040.00416.27
7.3.290.0060.00716.30
7.3.280.0080.00716.28
7.3.270.0060.01217.40
7.3.260.0030.01316.46
7.3.250.0150.00416.36
7.3.240.0120.00616.25
7.3.230.0140.00516.39
7.3.210.0110.00516.58
7.3.200.0160.00019.39
7.3.190.0110.00516.54
7.3.180.0140.00616.23
7.3.170.0050.01016.48
7.3.160.0150.00016.26
7.3.120.0070.00714.55
7.2.330.0090.00916.33
7.2.320.0180.00016.51
7.2.310.0110.01116.50
7.2.300.0060.01016.52
7.2.290.0080.00816.60
7.2.00.0000.01319.10
7.1.100.0030.00717.85
7.1.70.0000.00717.21
7.1.60.0060.01619.82
7.1.50.0170.00716.93
7.1.00.0030.04722.27
7.0.200.0060.00316.75
7.0.140.0070.07022.15
7.0.60.0070.08019.86
7.0.50.0170.07017.85
7.0.40.0070.07720.09
7.0.30.0270.04020.17
7.0.20.0370.06720.16
7.0.10.0370.08020.13
7.0.00.0130.03020.20
5.6.280.0030.07320.86
5.6.210.0100.08320.75
5.6.200.0070.03718.13
5.6.190.0070.08320.62
5.6.180.3870.04020.27
5.6.170.0170.04020.50
5.6.160.0070.04320.33
5.6.150.0170.05318.21
5.6.140.0030.04018.13
5.6.130.0100.05718.11
5.6.120.0030.05321.01
5.6.110.0130.07321.11
5.6.100.0100.08321.00
5.6.90.0030.07320.96
5.6.80.0000.04320.36
5.6.70.0330.07720.50
5.5.350.0230.05320.49
5.5.340.0070.06018.01
5.5.330.0100.05320.12
5.5.320.0170.06720.29
5.5.310.0230.07720.28
5.5.300.0070.07317.96
5.5.290.0030.08718.02
5.5.280.0030.04320.97
5.5.270.0000.04720.87
5.5.260.0070.03720.70
5.5.250.0070.07720.77
5.5.240.0070.05020.11
5.4.450.0900.04019.45
5.4.440.0800.05719.64
5.4.430.0130.05319.27
5.4.420.0730.06019.54
5.4.410.0800.06719.50
5.4.400.0400.06018.57
5.4.390.0470.06318.57
5.4.380.0370.04318.50
5.4.370.0270.04718.58
5.4.360.0130.05318.50
5.4.350.0230.04718.78
5.4.340.0170.05318.68
5.4.320.0050.04012.45
5.4.310.0040.04012.45
5.4.300.0070.03412.45
5.4.290.0050.03812.45
5.4.280.0070.04012.35
5.4.270.0130.04112.34
5.4.260.0100.04718.92
5.4.250.0100.06318.89
5.4.240.0030.05319.02
5.4.230.0100.04718.79
5.4.220.0070.05318.71
5.4.210.0200.04718.78
5.4.200.0170.04018.92
5.4.190.0100.04718.88
5.4.180.0170.04318.73
5.4.170.0130.04718.75
5.4.160.0170.04318.86
5.4.150.0130.04718.71
5.4.140.0130.04316.52
5.4.130.0100.04316.46
5.4.120.0070.05316.46
5.4.110.0130.04716.37
5.4.100.0070.06716.52
5.4.90.0000.05316.42
5.4.80.0070.06716.47
5.4.70.0170.05016.39
5.4.60.0100.07016.33
5.4.50.0030.05016.50
5.4.40.0000.05316.48
5.4.30.0000.05316.31
5.4.20.0030.05016.20
5.4.10.0070.05316.26
5.4.00.0100.04315.68
5.3.290.0080.04012.80
5.3.280.0070.05014.63
5.3.270.0070.05714.61
5.3.260.0000.06014.39
5.3.250.0100.04714.61
5.3.240.0000.06014.69
5.3.230.0100.04314.47
5.3.220.0100.05314.66
5.3.210.0070.05714.58
5.3.200.0030.05714.59
5.3.190.0070.05014.60
5.3.180.0100.04714.71
5.3.170.0030.05014.56
5.3.160.0100.04714.59
5.3.150.0130.04714.47
5.3.140.0070.04714.59
5.3.130.0000.06014.41
5.3.120.0100.05314.55
5.3.110.0100.05014.39
5.3.100.0130.04313.91
5.3.90.0130.04313.85
5.3.80.0070.04713.79
5.3.70.0070.04714.03
5.3.60.0070.05013.95
5.3.50.0100.04313.96
5.3.40.0000.05313.78
5.3.30.0030.05313.77
5.3.20.0100.04313.46
5.3.10.0000.05013.66
5.3.00.0170.03713.63
5.2.170.0030.04310.98
5.2.160.0070.03711.29
5.2.150.0170.03011.16
5.2.140.0100.03711.04
5.2.130.0030.04011.11
5.2.120.0100.03711.01
5.2.110.0070.03710.86
5.2.100.0000.04311.11
5.2.90.0070.04011.01
5.2.80.0000.04311.01
5.2.70.0030.04010.85
5.2.60.0100.05311.05
5.2.50.0170.03011.04
5.2.40.0000.04311.02
5.2.30.0030.06010.88
5.2.20.0170.04310.87
5.2.10.0070.03710.84
5.2.00.0030.05010.71
5.1.60.0030.0339.76
5.1.50.0030.03310.05
5.1.40.0070.03710.12
5.1.30.0030.03710.50
5.1.20.0030.05010.43
5.1.10.0030.03310.11
5.1.00.0070.03310.09
5.0.50.0000.0308.77
5.0.40.0000.0278.36
5.0.30.0000.0438.10
5.0.20.0030.0238.23
5.0.10.0000.0308.00
5.0.00.0100.0338.14
4.4.90.0030.0207.24
4.4.80.0030.0207.24
4.4.70.0000.0237.24
4.4.60.0030.0277.24
4.4.50.0000.0207.24
4.4.40.0030.0307.24
4.4.30.0000.0207.24
4.4.20.0000.0237.24
4.4.10.0030.0207.24
4.4.00.0000.0337.24
4.3.110.0100.0237.24
4.3.100.0000.0207.24
4.3.90.0000.0237.24
4.3.80.0030.0307.24
4.3.70.0000.0207.24
4.3.60.0030.0207.24
4.3.50.0000.0237.24
4.3.40.0070.0277.24
4.3.30.0030.0207.24
4.3.20.0000.0207.24
4.3.10.0030.0207.24
4.3.00.0100.0237.94

preferences:
47.08 ms | 400 KiB | 5 Q