3v4l.org

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

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)
8.3.60.0140.00718.30
8.3.50.0070.01116.25
8.3.40.0150.00018.67
8.3.30.0120.00319.21
8.3.20.0040.00420.09
8.3.10.0080.00023.66
8.3.00.0060.00319.50
8.2.180.0030.01716.38
8.2.170.0150.00022.96
8.2.160.0160.00020.38
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0000.00722.23
8.2.110.0030.00722.07
8.2.100.0080.00417.63
8.2.90.0050.00319.21
8.2.80.0080.00017.97
8.2.70.0070.00717.38
8.2.60.0040.00418.03
8.2.50.0000.00718.07
8.2.40.0040.00419.97
8.2.30.0040.00418.11
8.2.20.0050.00317.79
8.2.10.0080.00018.09
8.2.00.0060.00317.77
8.1.280.0040.01125.92
8.1.270.0060.01223.78
8.1.260.0040.00426.35
8.1.250.0020.00528.09
8.1.240.0030.00623.98
8.1.230.0090.00319.38
8.1.220.0040.00417.74
8.1.210.0050.00318.77
8.1.200.0040.00717.22
8.1.190.0040.00417.35
8.1.180.0040.00418.10
8.1.170.0000.00818.71
8.1.160.0070.00022.05
8.1.150.0000.00818.94
8.1.140.0040.00417.49
8.1.130.0030.00317.82
8.1.120.0040.00417.34
8.1.110.0030.00317.34
8.1.100.0040.00417.44
8.1.90.0030.00517.35
8.1.80.0040.00417.38
8.1.70.0070.00017.28
8.1.60.0000.00817.59
8.1.50.0000.00817.51
8.1.40.0040.00417.43
8.1.30.0040.00417.60
8.1.20.0000.00817.71
8.1.10.0090.00017.50
8.1.00.0000.00717.45
8.0.300.0070.00018.77
8.0.290.0050.00216.75
8.0.280.0030.00318.39
8.0.270.0040.00417.25
8.0.260.0080.00017.31
8.0.250.0000.00717.03
8.0.240.0000.00616.86
8.0.230.0040.00416.92
8.0.220.0030.00316.84
8.0.210.0050.00216.87
8.0.200.0000.00716.93
8.0.190.0040.00416.97
8.0.180.0040.00416.87
8.0.170.0040.00416.92
8.0.160.0000.00716.93
8.0.150.0000.00816.78
8.0.140.0030.00516.86
8.0.130.0060.00313.27
8.0.120.0050.00316.87
8.0.110.0030.00616.78
8.0.100.0000.00716.93
8.0.90.0000.00716.68
8.0.80.0160.00916.87
8.0.70.0040.00416.78
8.0.60.0070.00016.71
8.0.50.0030.00516.91
8.0.30.0100.01217.19
8.0.20.0140.01117.40
8.0.10.0000.00716.88
8.0.00.0050.01416.72
7.4.330.0040.00415.02
7.4.320.0040.00416.52
7.4.300.0000.00616.48
7.4.290.0070.00016.48
7.4.280.0040.00416.43
7.4.270.0000.00716.59
7.4.260.0000.00716.57
7.4.250.0040.00416.41
7.4.240.0000.00716.51
7.4.230.0030.00616.52
7.4.220.0070.01016.55
7.4.210.0060.01016.62
7.4.200.0070.00016.66
7.4.160.0140.00716.54
7.4.150.0070.01717.40
7.4.140.0060.01117.86
7.4.130.0120.00516.55
7.4.120.0100.01016.49
7.4.110.0130.00416.52
7.4.100.0120.00616.31
7.4.90.0000.01616.38
7.4.80.0140.00319.39
7.4.70.0110.00916.55
7.4.60.0070.01016.49
7.4.50.0000.00416.67
7.4.40.0060.01216.47
7.4.30.0080.00816.52
7.4.00.0080.00914.86
7.3.330.0050.00012.93
7.3.320.0020.00213.07
7.3.310.0040.00416.00
7.3.300.0050.00216.20
7.3.290.0050.01216.14
7.3.280.0070.00916.18
7.3.270.0080.01117.40
7.3.260.0070.01016.41
7.3.250.0100.01216.35
7.3.240.0030.01416.29
7.3.230.0150.00616.39
7.3.210.0110.00516.16
7.3.200.0080.00819.39
7.3.190.0100.01016.32
7.3.180.0100.00616.32
7.3.170.0120.00916.27
7.3.160.0030.01316.28
7.3.120.0020.01714.76
7.3.110.0030.01214.85
7.3.100.0090.00714.62
7.3.90.0080.00614.70
7.3.80.0070.00715.01
7.3.70.0050.00714.69
7.3.60.0060.00614.71
7.3.50.0020.01114.82
7.3.40.0040.01114.85
7.3.30.0020.01114.64
7.3.20.0070.00916.70
7.3.10.0030.01316.40
7.3.00.0010.01516.54
7.2.330.0100.01316.38
7.2.320.0130.00316.51
7.2.310.0070.01016.49
7.2.300.0080.00816.61
7.2.290.0090.00916.49
7.2.250.0110.00715.18
7.2.240.0080.01014.91
7.2.230.0040.01214.86
7.2.220.0000.01614.84
7.2.210.0060.01015.14
7.2.200.0060.00614.98
7.2.190.0090.00614.94
7.2.180.0040.01114.86
7.2.170.0020.01414.98
7.1.330.0030.01115.60
7.1.320.0030.00815.54
7.1.310.0070.00516.00
7.1.300.0060.01115.60
7.1.290.0060.00615.87
7.1.280.0050.00615.77
7.1.270.0040.00915.67
7.1.260.0100.00315.89
7.1.200.0000.01315.74
7.1.70.0000.00817.04
7.1.60.0040.01819.11
7.1.50.0130.01016.79
7.1.00.0030.07722.43
7.0.200.0000.01016.79
7.0.140.0070.07021.95
7.0.90.0030.05019.86
7.0.80.0030.05719.95
7.0.70.0430.07719.85
7.0.60.0700.06719.88
7.0.50.0730.07320.35
7.0.40.0070.08020.08
7.0.30.0070.05720.00
7.0.20.0000.05019.95
7.0.10.0070.07320.17
7.0.00.0100.07720.18
5.6.280.0070.07020.81
5.6.240.0070.08020.59
5.6.230.0030.08320.67
5.6.220.0170.06720.62
5.6.210.0100.07720.60
5.6.200.0000.05021.13
5.6.190.0070.08321.00
5.6.180.0030.08021.07
5.6.170.0070.08720.95
5.6.160.0000.04320.95
5.6.150.0070.06021.16
5.6.140.0030.03721.05
5.6.130.0100.03721.04
5.6.120.0070.09720.94
5.6.110.0130.08020.98
5.6.100.0070.08321.00
5.6.90.0170.06721.14
5.6.80.0030.03720.38
5.6.70.0070.03720.45
5.6.60.0030.08320.39
5.6.50.0130.07320.48
5.6.40.0130.07720.39
5.6.30.0170.07720.46
5.6.20.0070.07320.30
5.6.10.0130.04720.29
5.6.00.0100.07320.34
5.5.380.0070.08720.56
5.5.370.0170.05020.35
5.5.360.0030.04320.46
5.5.350.0070.08320.32
5.5.340.0070.08320.91
5.5.330.0000.09320.88
5.5.320.0100.07020.76
5.5.310.0070.07320.78
5.5.300.0000.04020.89
5.5.290.0070.07320.84
5.5.280.0170.06720.73
5.5.270.0070.08020.71
5.5.260.0030.07720.87
5.5.250.0000.04720.70
5.5.240.0070.04320.27
5.5.230.0000.04020.24
5.5.220.0130.07720.24
5.5.210.0100.07720.17
5.5.200.0070.04720.27
5.5.190.0100.07319.98
5.5.180.0070.07719.98
5.5.160.0100.07720.21
5.5.150.0100.07020.24
5.5.140.0230.04020.17
5.5.130.0100.07720.13
5.5.120.0070.08020.23
5.5.110.0000.04320.24
5.5.100.0170.07020.01
5.5.90.0100.06720.14
5.5.80.0100.07020.14
5.5.70.0100.03720.13
5.5.60.0000.04719.93
5.5.50.0000.04320.09
5.5.40.0000.04720.14
5.5.30.0100.07320.05
5.5.20.0130.03320.07
5.5.10.0030.07020.11
5.5.00.0100.04320.03
5.4.450.0030.03719.44
5.4.440.0030.06319.47
5.4.430.0070.07319.36
5.4.420.0030.05019.35
5.4.410.0030.03319.31
5.4.400.0030.06019.04
5.4.390.0070.07719.14
5.4.380.0000.07719.12
5.4.370.0070.07019.03
5.4.360.0070.07719.12
5.4.350.0070.07718.78
5.4.340.0070.07719.03
5.4.320.0100.04718.79
5.4.310.0030.06318.78
5.4.300.0170.03019.02
5.4.290.0070.07719.07
5.4.280.0070.06319.05
5.4.270.0000.05019.04
5.4.260.0070.05018.89
5.4.250.0030.08319.04
5.4.240.0100.07319.02
5.4.230.0130.07019.22
5.4.220.0030.04319.14
5.4.210.0070.04318.94
5.4.200.0030.04719.11
5.4.190.0100.07019.02
5.4.180.0100.05718.96
5.4.170.0000.08718.80
5.4.160.0100.06319.00
5.4.150.0030.04019.10
5.4.140.0130.05316.22
5.4.130.0070.07716.23
5.4.120.0030.05716.02
5.4.110.0000.04016.50
5.4.100.0000.04016.29
5.4.90.0070.03316.25
5.4.80.0070.03316.20
5.4.70.0030.03016.19
5.4.60.0030.04016.35
5.4.50.0070.03016.31
5.4.40.0030.03716.25
5.4.30.0030.03316.37
5.4.20.0030.06016.31
5.4.10.0000.03716.23
5.4.00.0030.05715.68
5.3.290.0030.04014.52
5.3.280.0030.05714.50
5.3.270.0070.07014.45
5.3.260.0030.05014.42
5.3.250.0100.06014.46
5.3.240.0000.04314.62
5.3.230.0030.07714.59
5.3.220.0000.04014.53
5.3.210.0000.06014.54
5.3.200.0000.04314.50
5.3.190.0030.03314.55
5.3.180.0070.03314.42
5.3.170.0100.03014.55
5.3.160.0030.03314.50
5.3.150.0070.03014.38
5.3.140.0030.03714.51
5.3.130.0030.04314.46
5.3.120.0000.04714.50
5.3.110.0030.04714.48
5.3.100.0130.04714.03
5.3.90.0070.03713.89
5.3.80.0030.03713.97
5.3.70.0030.03713.77
5.3.60.0130.02313.86
5.3.50.0100.05713.93
5.3.40.0030.03713.72
5.3.30.0000.03713.86
5.3.20.0070.03713.55
5.3.10.0000.03713.61
5.3.00.0000.03313.61
5.2.170.0030.03010.96
5.2.160.0030.02711.12
5.2.150.0000.03011.00
5.2.140.0000.03011.10
5.2.130.0000.03011.12
5.2.120.0000.03011.05
5.2.110.0000.03310.96
5.2.100.0000.03310.89
5.2.90.0070.03711.16
5.2.80.0000.03311.13
5.2.70.0030.03011.16
5.2.60.0000.03710.86
5.2.50.0000.03311.04
5.2.40.0030.03710.98
5.2.30.0000.03010.82
5.2.20.0030.02710.79
5.2.10.0030.02710.76
5.2.00.0000.03010.74
5.1.60.0030.02310.04
5.1.50.0030.0239.87
5.1.40.0070.02010.05
5.1.30.0000.03010.39
5.1.20.0030.02710.27
5.1.10.0000.03010.13
5.1.00.0100.03710.09
5.0.50.0000.0238.57
5.0.40.0000.0178.47
5.0.30.0000.0338.32
5.0.20.0000.0178.32
5.0.10.0000.0208.32
5.0.00.0000.0308.32
4.4.90.0030.0138.32
4.4.80.0030.0138.32
4.4.70.0030.0138.32
4.4.60.0000.0178.32
4.4.50.0030.0138.32
4.4.40.0000.0238.32
4.4.30.0030.0238.32
4.4.20.0000.0278.32
4.4.10.0000.0208.32
4.4.00.0000.0238.32
4.3.110.0000.0178.32
4.3.100.0000.0138.32
4.3.90.0000.0138.32
4.3.80.0030.0238.32
4.3.70.0000.0208.32
4.3.60.0000.0138.32
4.3.50.0000.0138.32
4.3.40.0030.0208.32
4.3.30.0000.0338.32
4.3.20.0070.0338.32
4.3.10.0000.0138.32
4.3.00.0030.0108.32

preferences:
39.94 ms | 400 KiB | 5 Q