3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $array = array($a, &$a); var_dump(serialize($array)); var_dump(unserialize(serialize($array)));

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)
8.3.60.0100.01018.03
8.3.50.0110.00822.05
8.3.40.0120.00318.63
8.3.30.0100.00320.11
8.3.20.0040.00418.62
8.3.10.0080.00021.05
8.3.00.0000.00819.67
8.2.180.0120.00616.38
8.2.170.0040.01122.96
8.2.160.0070.01020.58
8.2.150.0030.00524.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0070.00019.89
8.2.110.0060.00321.02
8.2.100.0080.00417.78
8.2.90.0040.00419.28
8.2.80.0050.00317.97
8.2.70.0030.00517.50
8.2.60.0040.00418.04
8.2.50.0000.00818.07
8.2.40.0080.00019.73
8.2.30.0000.00819.44
8.2.20.0050.00317.72
8.2.10.0030.00517.70
8.2.00.0030.00617.68
8.1.280.0060.01325.92
8.1.270.0040.00423.99
8.1.260.0120.00326.35
8.1.250.0110.00428.09
8.1.240.0090.00021.02
8.1.230.0070.00417.42
8.1.220.0000.00917.79
8.1.210.0050.00318.77
8.1.200.0060.00317.22
8.1.190.0050.00217.53
8.1.180.0000.00818.10
8.1.170.0040.00418.40
8.1.160.0000.00818.83
8.1.150.0040.00418.59
8.1.140.0070.00017.36
8.1.130.0030.00317.73
8.1.120.0040.00417.33
8.1.110.0080.00017.34
8.1.100.0050.00317.53
8.1.90.0040.00417.50
8.1.80.0070.00017.52
8.1.70.0030.00317.30
8.1.60.0030.00617.61
8.1.50.0000.00817.52
8.1.40.0000.00817.57
8.1.30.0080.00017.64
8.1.20.0040.00417.48
8.1.10.0040.00417.53
8.1.00.0040.00717.41
8.0.300.0060.00318.77
8.0.290.0000.00816.73
8.0.280.0040.00418.39
8.0.270.0000.00717.18
8.0.260.0000.00616.80
8.0.250.0070.00317.03
8.0.240.0050.00216.91
8.0.230.0040.00316.98
8.0.220.0030.00316.92
8.0.210.0030.00516.97
8.0.200.0000.00617.03
8.0.190.0040.00416.98
8.0.180.0050.00316.89
8.0.170.0040.00416.98
8.0.160.0050.00316.98
8.0.150.0080.00016.95
8.0.140.0020.00516.94
8.0.130.0000.00813.26
8.0.120.0000.00716.81
8.0.110.0040.00416.84
8.0.100.0030.00316.99
8.0.90.0000.00716.79
8.0.80.0100.01316.86
8.0.70.0040.00416.95
8.0.60.0050.00216.96
8.0.50.0030.00316.77
8.0.30.0080.01017.07
8.0.20.0110.01017.40
8.0.10.0030.00517.14
8.0.00.0080.01016.69
7.4.330.0000.00516.84
7.4.320.0080.00016.49
7.4.300.0050.00216.57
7.4.290.0000.00616.39
7.4.280.0070.00016.45
7.4.270.0030.00316.53
7.4.260.0060.00013.22
7.4.250.0050.00316.56
7.4.240.0030.00316.60
7.4.230.0000.00716.48
7.4.220.0120.00916.58
7.4.210.0060.01016.58
7.4.200.0050.00316.67
7.4.190.0000.00716.59
7.4.160.0100.00616.36
7.4.150.0130.00617.40
7.4.140.0060.01617.86
7.4.130.0150.00616.55
7.4.120.0080.01116.45
7.4.110.0060.01216.48
7.4.100.0070.01116.49
7.4.90.0100.01016.52
7.4.80.0130.01019.39
7.4.70.0080.00816.39
7.4.60.0090.00616.47
7.4.50.0030.00616.27
7.4.40.0100.00722.77
7.4.30.0100.01016.52
7.4.00.0070.01014.79
7.3.330.0000.00513.09
7.3.320.0050.00012.93
7.3.310.0000.00716.35
7.3.300.0040.00416.06
7.3.290.0060.00916.22
7.3.280.0040.01216.24
7.3.270.0170.00017.40
7.3.260.0090.01218.24
7.3.250.0100.01016.34
7.3.240.0130.00316.43
7.3.230.0070.00916.39
7.3.210.0120.00416.27
7.3.200.0110.00719.39
7.3.190.0210.00416.27
7.3.180.0090.00616.36
7.3.170.0120.00916.39
7.3.160.0140.00316.27
7.3.120.0070.01014.79
7.2.330.0120.00616.63
7.2.320.0130.00316.40
7.2.310.0130.00616.55
7.2.300.0060.01016.52
7.2.290.0030.01316.43
7.1.70.0080.00317.27
7.1.60.0100.01319.24
7.1.50.0110.01116.91
7.1.00.0000.05322.43
7.0.200.0000.01016.62
7.0.140.0000.07722.11
7.0.100.0030.09719.96
7.0.90.0030.08719.96
7.0.80.0070.08019.86
7.0.70.0230.08019.83
7.0.60.0000.07019.93
7.0.50.0300.07720.23
7.0.40.0030.06720.12
7.0.30.0070.05320.04
7.0.20.0130.07020.17
7.0.10.0070.05020.11
7.0.00.0030.09320.07
5.6.280.0130.06020.82
5.6.250.0100.08020.62
5.6.240.0030.07020.57
5.6.230.0000.05320.56
5.6.220.0030.06020.68
5.6.210.0130.07720.76
5.6.200.0000.04721.03
5.6.190.0130.07721.01
5.6.180.0100.05320.91
5.6.170.0000.08321.00
5.6.160.0100.08321.12
5.6.150.0030.06721.06
5.6.140.0070.08320.96
5.6.130.0070.07721.04
5.6.120.0230.07721.00
5.6.110.0200.07021.14
5.6.100.0170.07720.98
5.6.90.0030.06720.91
5.6.80.0100.06720.43
5.6.70.0100.06320.49
5.6.60.0130.03720.48
5.6.50.0030.08020.30
5.6.40.0070.06720.30
5.6.30.0070.04320.39
5.6.20.0100.08020.29
5.6.10.0030.04320.29
5.6.00.0030.08320.33
5.5.380.0100.07320.38
5.5.370.0070.05320.41
5.5.360.0100.06320.49
5.5.350.0030.08320.36
5.5.340.0070.04320.77
5.5.330.0000.05020.76
5.5.320.0100.04320.87
5.5.310.0100.08320.79
5.5.300.0130.04020.74
5.5.290.0130.04020.88
5.5.280.0030.05020.73
5.5.270.0200.07720.75
5.5.260.0100.05720.61
5.5.250.0100.07320.55
5.5.240.0100.04320.01
5.5.230.0100.07020.22
5.5.220.0070.06720.25
5.5.210.0100.06720.13
5.5.200.0100.07320.22
5.5.190.0030.07320.21
5.5.180.0100.08020.23
5.5.160.0070.07020.14
5.5.150.0070.04020.10
5.5.140.0130.07020.25
5.5.130.0030.04020.19
5.5.120.0070.05020.25
5.5.110.0070.04720.20
5.5.100.0070.07020.06
5.5.90.0130.07020.14
5.5.80.0070.08020.09
5.5.70.0030.05020.01
5.5.60.0130.07320.06
5.5.50.0070.05720.12
5.5.40.0070.07020.11
5.5.30.0170.06720.02
5.5.20.0100.04019.93
5.5.10.0070.06020.00
5.5.00.0030.04720.09
5.4.450.0130.04019.39
5.4.440.0170.07319.38
5.4.430.0130.05019.42
5.4.420.0070.04719.38
5.4.410.0070.08019.31
5.4.400.0030.07719.01
5.4.390.0130.07319.23
5.4.380.0030.04319.12
5.4.370.0100.03719.04
5.4.360.0130.07719.05
5.4.350.0130.06019.07
5.4.340.0030.05319.05
5.4.320.0000.05318.98
5.4.310.0070.05018.98
5.4.300.0000.06319.04
5.4.290.0070.06018.94
5.4.280.0030.06319.07
5.4.270.0130.07019.04
5.4.260.0030.09719.02
5.4.250.0030.04719.06
5.4.240.0070.04719.09
5.4.230.0030.07718.90
5.4.220.0070.07319.07
5.4.210.0070.04319.02
5.4.200.0030.04719.11
5.4.190.0030.08719.13
5.4.180.0000.04719.08
5.4.170.0030.04319.08
5.4.160.0100.07019.02
5.4.150.0030.05319.09
5.4.140.0130.06716.27
5.4.130.0030.04316.06
5.4.120.0030.07016.25
5.4.110.0130.05016.20
5.4.100.0100.07016.28
5.4.90.0070.06316.42
5.4.80.0070.07316.31
5.4.70.0000.04016.34
5.4.60.0170.06316.24
5.4.50.0070.04716.39
5.4.40.0100.07016.48
5.4.30.0200.06716.33
5.4.20.0170.03716.40
5.4.10.0000.06316.38
5.4.00.0070.04315.71
5.3.290.0030.08714.49
5.3.280.0000.08314.42
5.3.270.0000.04714.45
5.3.260.0000.04714.47
5.3.250.0130.03314.43
5.3.240.0200.05714.46
5.3.230.0100.07714.60
5.3.220.0100.03714.57
5.3.210.0130.07014.39
5.3.200.0070.03314.51
5.3.190.0130.03714.50
5.3.180.0070.06014.55
5.3.170.0070.05714.55
5.3.160.0000.04014.55
5.3.150.0230.05014.50
5.3.140.0000.04314.55
5.3.130.0000.07714.41
5.3.120.0100.07014.51
5.3.110.0170.06314.51
5.3.100.0100.04013.99
5.3.90.0130.04713.88
5.3.80.0070.03713.87
5.3.70.0100.06713.88
5.3.60.0130.07013.98
5.3.50.0070.05713.92
5.3.40.0100.05013.95
5.3.30.0100.03713.66
5.3.20.0070.07013.70
5.3.10.0070.06713.61
5.3.00.0130.05713.55
5.2.170.0030.04711.14
5.2.160.0070.04010.97
5.2.150.0000.06311.13
5.2.140.0130.04311.12
5.2.130.0100.05711.17
5.2.120.0000.03711.02
5.2.110.0070.06711.14
5.2.100.0030.05011.09
5.2.90.0000.06711.08
5.2.80.0000.05011.15
5.2.70.0030.03711.13
5.2.60.0030.03311.11
5.2.50.0030.03311.09
5.2.40.0000.06010.83
5.2.30.0070.03310.96
5.2.20.0070.05310.95
5.2.10.0030.05710.89
5.2.00.0070.03310.67
5.1.60.0000.04710.02
5.1.50.0030.0409.98
5.1.40.0070.03710.00
5.1.30.0030.03010.26
5.1.20.0100.04010.36
5.1.10.0030.03010.08
5.1.00.0070.02310.06
5.0.50.0030.0238.91
5.0.40.0000.0208.91
5.0.30.0000.0378.91
5.0.20.0070.0378.91
5.0.10.0070.0308.91
5.0.00.0130.0438.91
4.4.90.0000.0378.91
4.4.80.0030.0178.91
4.4.70.0030.0178.91
4.4.60.0000.0338.91
4.4.50.0000.0278.91
4.4.40.0030.0408.91
4.4.30.0000.0208.91
4.4.20.0000.0338.91
4.4.10.0000.0278.91
4.4.00.0000.0338.91
4.3.110.0000.0178.91
4.3.100.0000.0208.91
4.3.90.0030.0338.91
4.3.80.0000.0338.91
4.3.70.0070.0308.91
4.3.60.0030.0338.91
4.3.50.0070.0338.91
4.3.40.0030.0378.91
4.3.30.0000.0308.91
4.3.20.0000.0308.91
4.3.10.0000.0238.91
4.3.00.0070.0278.91

preferences:
45.01 ms | 401 KiB | 5 Q