3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1, 2); $b = array(&$a); $a[] = $b; var_dump(json_encode($a));

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)
8.3.40.0110.00718.48
8.3.30.0080.00819.21
8.3.20.0070.00020.21
8.3.10.0040.00423.71
8.3.00.0050.00319.25
8.2.170.0100.01022.96
8.2.160.0070.00720.19
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00422.27
8.2.110.0070.00319.20
8.2.100.0090.00317.50
8.2.90.0050.00319.23
8.2.80.0040.00417.97
8.2.70.0090.00417.50
8.2.60.0000.00717.93
8.2.50.0050.00318.07
8.2.40.0000.00820.07
8.2.30.0070.00018.05
8.2.20.0040.00417.79
8.2.10.0000.00818.09
8.2.00.0000.00817.61
8.1.270.0100.00722.04
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0030.00623.92
8.1.230.0000.01217.42
8.1.220.0040.00417.76
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0050.00317.00
8.1.180.0040.00418.10
8.1.170.0040.00418.59
8.1.160.0030.00522.00
8.1.150.0040.00418.84
8.1.140.0000.00717.55
8.1.130.0030.00317.83
8.1.120.0040.00417.35
8.1.110.0040.00417.34
8.1.100.0000.00717.40
8.1.90.0000.00717.39
8.1.80.0040.00417.48
8.1.70.0070.00017.42
8.1.60.0060.00317.53
8.1.50.0030.00617.40
8.1.40.0070.00017.38
8.1.30.0050.00317.57
8.1.20.0000.00817.63
8.1.10.0080.00017.41
8.1.00.0040.00417.41
8.0.300.0040.00418.77
8.0.290.0000.00816.63
8.0.280.0000.00718.35
8.0.270.0000.00617.15
8.0.260.0060.00017.29
8.0.250.0000.00716.99
8.0.240.0050.00216.97
8.0.230.0040.00416.91
8.0.220.0030.00316.80
8.0.210.0030.00316.93
8.0.200.0030.00316.80
8.0.190.0030.00416.84
8.0.180.0000.00816.94
8.0.170.0050.00316.91
8.0.160.0000.00816.90
8.0.150.0050.00316.87
8.0.140.0030.00416.83
8.0.130.0000.00613.32
8.0.120.0050.00216.79
8.0.110.0000.00816.72
8.0.100.0050.00216.86
8.0.90.0050.00316.89
8.0.80.0160.00616.84
8.0.70.0030.00616.87
8.0.60.0040.00416.82
8.0.50.0000.00716.85
8.0.30.0140.01017.09
8.0.20.0130.01017.42
8.0.10.0040.00416.95
8.0.00.0120.00516.59
7.4.330.0070.00015.02
7.4.320.0000.00716.60
7.4.300.0000.00616.55
7.4.290.0030.00316.58
7.4.280.0070.00016.63
7.4.270.0030.00316.64
7.4.260.0030.00316.49
7.4.250.0040.00416.45
7.4.240.0030.00516.55
7.4.230.0000.00616.54
7.4.220.0070.01016.70
7.4.210.0120.00816.53
7.4.200.0030.00316.40
7.4.160.0060.01016.37
7.4.150.0090.01217.40
7.4.140.0090.01117.86
7.4.130.0090.00716.58
7.4.120.0070.01016.46
7.4.110.0060.01416.26
7.4.100.0060.01216.41
7.4.90.0060.01116.50
7.4.80.0160.00319.39
7.4.70.0090.00916.59
7.4.60.0100.00716.45
7.4.50.0090.00016.48
7.4.40.0000.01716.53
7.4.30.0110.01116.43
7.4.00.0070.01014.91
7.3.330.0030.00313.16
7.3.320.0030.00313.00
7.3.310.0030.00416.15
7.3.300.0040.00416.20
7.3.290.0090.00816.18
7.3.280.0090.00716.14
7.3.270.0140.00717.40
7.3.260.0000.01616.35
7.3.250.0140.01116.33
7.3.240.0110.00716.35
7.3.230.0190.01816.39
7.3.210.0130.00316.25
7.3.200.0100.00619.39
7.3.190.0040.01416.22
7.3.180.0090.00616.43
7.3.170.0140.00616.27
7.3.160.0070.01316.13
7.3.10.0120.00316.65
7.3.00.0100.00316.44
7.2.330.0070.01016.37
7.2.320.0070.01016.54
7.2.310.0130.00616.34
7.2.300.0030.01316.65
7.2.290.0100.00716.79
7.2.130.0100.00616.46
7.2.120.0090.00616.68
7.2.110.0000.01616.50
7.2.100.0100.00716.69
7.2.90.0070.00716.70
7.2.80.0000.01316.96
7.2.70.0000.01416.57
7.2.60.0070.00816.71
7.2.50.0070.00716.44
7.2.40.0070.00716.69
7.2.30.0030.01516.80
7.2.20.0070.00716.88
7.2.10.0040.01116.76
7.2.00.0030.01118.14
7.1.250.0080.00315.69
7.1.200.0030.00715.95
7.1.100.0040.00818.15
7.1.70.0000.00716.84
7.1.60.0140.01019.11
7.1.50.0130.00916.87
7.1.00.0000.08022.47
7.0.200.0000.00716.88
7.0.140.0070.07022.00
7.0.90.0170.08319.91
7.0.80.0030.05719.94
7.0.70.0130.08019.93
7.0.60.0200.07320.07
7.0.50.0600.04020.32
7.0.40.0100.06320.14
7.0.30.0070.06320.10
7.0.20.0100.05320.10
7.0.10.0070.04320.08
7.0.00.0070.04020.13
5.6.280.0030.07321.14
5.6.240.0100.07720.68
5.6.230.0030.09020.71
5.6.220.0030.08320.64
5.6.210.0030.08020.76
5.6.200.0130.05721.09
5.6.190.0170.07020.93
5.6.180.0100.06321.03
5.6.170.0070.08721.00
5.6.160.0130.03321.13
5.6.150.0030.04721.13
5.6.140.0070.06720.95
5.6.130.0170.07721.16
5.6.120.0100.07720.98
5.6.110.0130.08320.90
5.6.100.0070.05021.15
5.6.90.0130.08020.95
5.6.80.0170.07020.31
5.6.70.0030.05020.33
5.6.60.0100.07020.46
5.6.50.0100.04720.34
5.6.40.0070.05020.52
5.6.30.0030.06020.40
5.6.20.0030.06320.38
5.6.10.0070.08020.46
5.6.00.0030.08020.44
5.5.380.0030.09020.45
5.5.370.0030.05320.38
5.5.360.0130.07720.43
5.5.350.0130.08020.46
5.5.340.0070.08320.90
5.5.330.0030.04720.86
5.5.320.0130.06720.89
5.5.310.0070.07720.89
5.5.300.0070.08020.77
5.5.290.0030.06720.89
5.5.280.0070.06020.75
5.5.270.0070.08720.78
5.5.260.0130.07720.89
5.5.250.0070.07720.53
5.5.240.0070.07720.31
5.5.230.0070.06720.24
5.5.220.0100.08020.14
5.5.210.0100.07320.28
5.5.200.0070.08320.20
5.5.190.0100.07720.07
5.5.180.0030.09020.27
5.5.160.0100.05320.18
5.5.150.0070.04720.22
5.5.140.0030.04319.98
5.5.130.0030.08320.22
5.5.120.0130.05720.21
5.5.110.0070.08020.07
5.5.100.0030.05020.11
5.5.90.0130.06320.05
5.5.80.0100.06720.15
5.5.70.0070.07720.05
5.5.60.0070.05020.08
5.5.50.0000.05020.13
5.5.40.0030.04720.02
5.5.30.0100.08020.10
5.5.20.0100.08319.92
5.5.10.0000.08719.94
5.5.00.0030.08320.06
5.4.450.0130.04719.14
5.4.440.0100.08019.13
5.4.430.0000.07719.39
5.4.420.0070.08319.29
5.4.410.0130.07719.44
5.4.400.0100.06719.03
5.4.390.0170.06018.78
5.4.380.0030.07719.03
5.4.370.0070.04019.12
5.4.360.0100.06719.03
5.4.350.0030.07319.14
5.4.340.0070.05719.03
5.4.320.0170.06718.97
5.4.310.0130.03718.98
5.4.300.0100.07319.04
5.4.290.0000.05319.23
5.4.280.0030.07019.12
5.4.270.0070.06319.06
5.4.260.0130.05719.04
5.4.250.0030.08019.09
5.4.240.0100.05719.14
5.4.230.0070.04718.89
5.4.220.0070.06319.04
5.4.210.0070.05719.14
5.4.200.0070.05019.16
5.4.190.0030.07719.11
5.4.180.0030.06318.75
5.4.170.0070.07018.77
5.4.160.0030.08019.01
5.4.150.0030.07719.20
5.4.140.0030.08016.32
5.4.130.0070.07016.22
5.4.120.0030.04016.31
5.4.110.0030.07716.36
5.4.100.0100.07016.30
5.4.90.0100.04316.22
5.4.80.0100.06716.22
5.4.70.0070.07716.24
5.4.60.0070.07016.20
5.4.50.0000.08316.39
5.4.40.0100.07016.33
5.4.30.0070.07316.22
5.4.20.0130.06316.34
5.4.10.0070.04716.30
5.4.00.0100.06015.66
5.3.290.0000.04714.66
5.3.280.0030.04314.47
5.3.270.0130.05314.46
5.3.260.0100.07014.46
5.3.250.0070.06014.56
5.3.240.0070.07014.60
5.3.230.0170.07014.56
5.3.220.0070.07014.54
5.3.210.0030.08014.51
5.3.200.0070.06714.53
5.3.190.0030.05014.57
5.3.180.0000.04314.52
5.3.170.0130.06314.57
5.3.160.0000.08014.42
5.3.150.0170.07014.42
5.3.140.0100.06314.38
5.3.130.0200.06714.55
5.3.120.0030.07314.54
5.3.110.0100.06714.41
5.3.100.0170.06314.02
5.3.90.0070.06713.84
5.3.80.0030.07013.88
5.3.70.0070.07714.00
5.3.60.0100.07313.98
5.3.50.0030.06713.88
5.3.40.0070.05713.95
5.3.30.0070.05313.77
5.3.20.0070.06013.55
5.3.10.0000.05713.61
5.3.00.0130.06013.59
5.2.170.0070.05710.97
5.2.160.0000.04711.16
5.2.150.0100.05710.98
5.2.140.0000.03310.98
5.2.130.0000.06311.15
5.2.120.0000.06311.02
5.2.110.0170.05010.91
5.2.100.0030.06011.09
5.2.90.0030.06710.98
5.2.80.0070.06011.13
5.2.70.0070.05711.07
5.2.60.0070.05711.07
5.2.50.0130.05311.00
5.2.40.0070.06010.95
5.2.30.0030.05710.96
5.2.20.0100.05010.95
5.2.10.0130.03710.91
5.2.00.0000.06710.61
5.1.60.0100.04710.07
5.1.50.0100.0409.83
5.1.40.0070.03710.00
5.1.30.0100.05010.39
5.1.20.0000.06010.37
5.1.10.0070.04310.09
5.1.00.0070.0279.89
5.0.50.0000.0408.53
5.0.40.0100.0378.24
5.0.30.0030.0538.10
5.0.20.0070.0408.24
5.0.10.0030.0438.16
5.0.00.0000.0578.15
4.4.90.0000.0337.24
4.4.80.0070.0337.24
4.4.70.0000.0207.24
4.4.60.0030.0307.24
4.4.50.0070.0237.24
4.4.40.0030.0307.24
4.4.30.0030.0377.24
4.4.20.0000.0207.24
4.4.10.0000.0307.24
4.4.00.0030.0407.24
4.3.110.0030.0337.24
4.3.100.0000.0377.24
4.3.90.0000.0207.24
4.3.80.0000.0507.24
4.3.70.0030.0307.24
4.3.60.0030.0277.24
4.3.50.0030.0307.24
4.3.40.0030.0477.24
4.3.30.0030.0337.24
4.3.20.0030.0337.24
4.3.10.0000.0307.24
4.3.00.0000.0307.24

preferences:
40.46 ms | 400 KiB | 5 Q