3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; $a[1] = 2; echo json_encode($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)
8.3.60.0080.00618.43
8.3.50.0090.01221.79
8.3.40.0080.00818.54
8.3.30.0110.00318.98
8.3.20.0030.00520.16
8.3.10.0030.00623.65
8.3.00.0000.00920.84
8.2.180.0170.00316.60
8.2.170.0100.00322.96
8.2.160.0140.00020.38
8.2.150.0080.00024.18
8.2.140.0000.00724.66
8.2.130.0070.01026.16
8.2.120.0000.00820.89
8.2.110.0060.00322.25
8.2.100.0040.00818.98
8.2.90.0090.00017.50
8.2.80.0040.00419.14
8.2.70.0080.00018.04
8.2.60.0050.00318.03
8.2.50.0060.00318.10
8.2.40.0040.00422.14
8.2.30.0030.00518.32
8.2.20.0040.00417.81
8.2.10.0030.00518.02
8.2.00.0040.00417.65
8.1.280.0110.01125.92
8.1.270.0050.00323.88
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0000.00822.52
8.1.230.0060.00619.05
8.1.220.0060.00317.79
8.1.210.0000.00818.77
8.1.200.0000.00817.13
8.1.190.0040.00417.23
8.1.180.0080.00018.10
8.1.170.0030.00618.54
8.1.160.0080.00021.86
8.1.150.0040.00418.50
8.1.140.0000.00817.39
8.1.130.0030.00317.82
8.1.120.0030.00317.45
8.1.110.0000.00817.24
8.1.100.0030.00417.27
8.1.90.0000.00717.42
8.1.80.0070.00017.30
8.1.70.0030.00317.27
8.1.60.0040.00417.42
8.1.50.0000.00817.45
8.1.40.0070.00017.45
8.1.30.0000.00817.47
8.1.20.0000.00717.61
8.1.10.0040.00417.59
8.1.00.0070.00017.46
8.0.300.0000.00819.61
8.0.290.0050.00316.63
8.0.280.0000.00718.38
8.0.270.0000.00717.18
8.0.260.0080.00017.25
8.0.250.0000.00716.79
8.0.240.0040.00416.96
8.0.230.0040.00416.80
8.0.220.0070.00016.80
8.0.210.0040.00416.80
8.0.200.0000.00616.95
8.0.190.0000.00816.89
8.0.180.0000.00716.72
8.0.170.0060.00316.75
8.0.160.0040.00416.79
8.0.150.0040.00416.80
8.0.140.0040.00416.64
8.0.130.0030.00313.31
8.0.120.0080.00016.84
8.0.110.0000.00716.88
8.0.100.0040.00416.76
8.0.90.0000.00816.90
8.0.80.0040.01116.71
8.0.70.0020.00516.78
8.0.60.0000.00716.78
8.0.50.0000.00816.70
8.0.30.0120.00717.00
8.0.20.0050.01317.40
8.0.10.0000.00716.77
8.0.00.0090.00816.72
7.4.330.0000.00515.11
7.4.320.0060.00016.38
7.4.300.0020.00516.55
7.4.290.0030.00316.59
7.4.280.0030.00316.54
7.4.270.0000.00716.30
7.4.260.0070.00016.38
7.4.250.0040.00416.28
7.4.240.0030.00416.53
7.4.230.0050.00216.38
7.4.220.0130.01016.49
7.4.210.0110.01116.50
7.4.200.0000.00716.65
7.4.160.0120.00316.51
7.4.150.0120.00617.40
7.4.140.0140.00917.86
7.4.130.0080.01116.43
7.4.120.0100.00716.54
7.4.110.0060.01016.73
7.4.100.0060.01216.40
7.4.90.0080.00816.32
7.4.80.0060.01319.39
7.4.70.0030.01616.42
7.4.60.0050.01316.36
7.4.50.0000.00516.28
7.4.40.0030.01416.48
7.4.30.0060.00916.68
7.4.00.0090.00315.13
7.3.330.0000.00513.07
7.3.320.0050.00013.04
7.3.310.0070.00016.04
7.3.300.0050.00216.11
7.3.290.0140.00016.16
7.3.280.0100.00816.18
7.3.270.0070.01017.40
7.3.260.0080.01116.20
7.3.250.0100.00716.17
7.3.240.0120.01316.29
7.3.230.0150.00816.39
7.3.210.0100.00616.21
7.3.200.0070.01019.39
7.3.190.0120.00916.31
7.3.180.0090.00616.63
7.3.170.0080.01216.38
7.3.160.0080.00816.33
7.3.120.0060.00615.02
7.2.330.0000.01716.44
7.2.320.0100.00716.64
7.2.310.0160.00016.23
7.2.300.0120.00316.69
7.2.290.0140.00916.27
7.2.60.0030.01216.68
7.2.00.0030.01019.45
7.1.200.0060.00615.71
7.1.100.0060.00617.77
7.1.70.0070.00017.26
7.1.60.0090.01619.70
7.1.50.0070.01816.83
7.1.00.0070.07322.51
7.0.200.0000.00816.42
7.0.140.0000.07722.12
7.0.90.0030.04719.88
7.0.80.0100.03319.80
7.0.70.0000.04319.91
7.0.60.0000.04319.88
7.0.50.0030.04020.19
7.0.40.0130.03320.19
7.0.30.0000.04320.05
7.0.20.0070.04020.14
7.0.10.0000.04320.12
7.0.00.0070.03720.03
5.6.280.0030.07320.85
5.6.230.0000.04720.69
5.6.220.0030.04020.48
5.6.210.0000.04020.77
5.6.200.0070.04021.13
5.6.190.0070.04721.10
5.6.180.0000.04321.02
5.6.170.0070.04321.02
5.6.160.0100.03321.16
5.6.150.0030.04021.05
5.6.140.0070.03721.10
5.6.130.0070.08020.98
5.6.120.0070.05021.03
5.6.110.0030.08020.94
5.6.100.0000.07020.91
5.6.90.0170.05320.96
5.6.80.0000.04720.39
5.6.70.0130.07020.46
5.6.60.0270.06020.48
5.6.50.0100.05720.39
5.6.40.0130.07020.39
5.6.30.0000.08020.45
5.6.20.0170.07020.41
5.6.10.0230.06720.29
5.6.00.0130.06320.30
5.5.370.0030.04020.49
5.5.360.0000.04320.34
5.5.350.0070.04320.46
5.5.340.0030.05020.88
5.5.330.0100.03320.75
5.5.320.0030.04020.63
5.5.310.0100.03320.88
5.5.300.0000.04020.92
5.5.290.0170.07320.81
5.5.280.0030.08720.77
5.5.270.0170.05020.91
5.5.260.0100.07020.88
5.5.250.0070.06720.54
5.5.240.0070.04720.11
5.5.230.0070.07020.13
5.5.220.0100.07720.25
5.5.210.0030.04320.22
5.5.200.0070.07720.17
5.5.190.0070.07320.18
5.5.180.0200.06720.11
5.5.160.0030.07320.17
5.5.150.0030.06020.14
5.5.140.0100.04720.22
5.5.130.0000.05020.21
5.5.120.0100.07719.98
5.5.110.0070.07720.14
5.5.100.0070.07720.13
5.5.90.0030.07720.13
5.5.80.0030.05720.05
5.5.70.0100.03720.14
5.5.60.0130.07720.14
5.5.50.0200.06320.07
5.5.40.0030.07320.13
5.5.30.0000.07320.07
5.5.20.0130.07320.04
5.5.10.0030.08320.07
5.5.00.0100.08020.04
5.4.450.0030.07719.14
5.4.440.0000.08719.40
5.4.430.0170.05019.28
5.4.420.0130.06319.26
5.4.410.0170.06319.29
5.4.400.0070.04319.15
5.4.390.0000.08319.13
5.4.380.0030.04319.07
5.4.370.0070.07319.23
5.4.360.0000.07718.95
5.4.350.0030.04718.90
5.4.340.0100.07718.98
5.4.320.0070.04719.10
5.4.310.0100.04719.03
5.4.300.0030.05018.98
5.4.290.0070.04319.14
5.4.280.0000.08718.81
5.4.270.0070.07319.23
5.4.260.0100.07018.80
5.4.250.0130.06318.77
5.4.240.0030.08019.04
5.4.230.0070.04018.97
5.4.220.0070.07719.12
5.4.210.0070.07719.22
5.4.200.0130.05019.06
5.4.190.0030.08018.82
5.4.180.0030.08019.08
5.4.170.0070.03719.09
5.4.160.0070.07019.04
5.4.150.0130.06719.12
5.4.140.0130.06316.22
5.4.130.0030.04316.33
5.4.120.0030.04016.22
5.4.110.0030.07016.22
5.4.100.0100.04316.38
5.4.90.0030.06716.36
5.4.80.0030.03716.20
5.4.70.0100.06716.21
5.4.60.0030.04716.20
5.4.50.0130.04316.18
5.4.40.0070.06716.35
5.4.30.0100.07016.26
5.4.20.0070.04016.23
5.4.10.0100.06016.36
5.4.00.0100.03715.75
5.3.290.0130.08014.65
5.3.280.0000.04314.54
5.3.270.0070.07714.60
5.3.260.0100.07714.45
5.3.250.0070.07714.52
5.3.240.0070.07014.59
5.3.230.0030.04714.45
5.3.220.0070.04714.53
5.3.210.0100.09014.56
5.3.200.0030.05014.54
5.3.190.0030.07014.43
5.3.180.0070.05014.48
5.3.170.0000.08014.39
5.3.160.0100.07014.55
5.3.150.0070.07314.55
5.3.140.0100.05714.53
5.3.130.0100.05014.54
5.3.120.0130.06714.37
5.3.110.0030.06014.54
5.3.100.0070.07014.05
5.3.90.0070.07713.98
5.3.80.0070.07313.99
5.3.70.0070.05314.01
5.3.60.0030.07014.01
5.3.50.0130.07013.93
5.3.40.0000.04313.70
5.3.30.0170.05713.89
5.3.20.0070.04013.45
5.3.10.0100.03713.52
5.3.00.0030.03313.50
5.2.170.0070.03711.00
5.2.160.0030.03311.06
5.2.150.0000.07011.21
5.2.140.0030.06711.14
5.2.130.0030.03710.93
5.2.120.0070.03311.12
5.2.110.0130.02311.12
5.2.100.0000.03010.95
5.2.90.0000.05011.02
5.2.80.0030.03711.05
5.2.70.0000.02711.14
5.2.60.0000.04311.10
5.2.50.0000.03011.01
5.2.40.0000.03010.85
5.2.30.0000.03010.91
5.2.20.0000.03710.96
5.2.10.0030.06010.84
5.2.00.0100.05010.72
5.1.60.0000.0509.98
5.1.50.0030.0279.99
5.1.40.0000.03310.00
5.1.30.0000.04010.40
5.1.20.0000.03010.38
5.1.10.0000.04710.13
5.1.00.0030.02710.13
5.0.50.0030.0508.56
5.0.40.0030.0378.39
5.0.30.0000.0538.31
5.0.20.0000.0438.26
5.0.10.0030.0278.16
5.0.00.0070.0577.99
4.4.90.0030.0307.04
4.4.80.0000.0177.04
4.4.70.0030.0337.04
4.4.60.0000.0377.04
4.4.50.0000.0407.04
4.4.40.0000.0507.04
4.4.30.0030.0307.04
4.4.20.0000.0177.04
4.4.10.0030.0307.04
4.4.00.0000.0577.04
4.3.110.0000.0277.04
4.3.100.0070.0207.04
4.3.90.0030.0207.04
4.3.80.0000.0477.04
4.3.70.0000.0307.04
4.3.60.0030.0337.04
4.3.50.0000.0277.04
4.3.40.0000.0407.04
4.3.30.0000.0337.04
4.3.20.0000.0237.04
4.3.10.0000.0237.04
4.3.00.0030.0337.04

preferences:
43.03 ms | 401 KiB | 5 Q