3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('recursive'); $arr[] = & $arr; var_dump(json_encode($arr)); var_dump(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)
8.3.40.0100.00618.68
8.3.30.0100.01019.01
8.3.20.0040.00420.21
8.3.10.0050.00322.09
8.3.00.0080.00022.57
8.2.170.0070.00722.96
8.2.160.0070.00722.14
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0090.00926.16
8.2.120.0040.00417.61
8.2.110.0070.00322.02
8.2.100.0090.00317.71
8.2.90.0040.00417.75
8.2.80.0000.00818.04
8.2.70.0080.00017.80
8.2.60.0040.00418.20
8.2.50.0040.00418.10
8.2.40.0060.00318.22
8.2.30.0040.00418.05
8.2.20.0000.00717.53
8.2.10.0030.00619.48
8.2.00.0030.00517.61
8.1.270.0050.00321.96
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0060.00320.88
8.1.230.0060.00619.13
8.1.220.0060.00317.74
8.1.210.0080.00018.77
8.1.200.0030.00617.23
8.1.190.0060.00317.10
8.1.180.0040.00418.10
8.1.170.0050.00318.66
8.1.160.0040.00421.85
8.1.150.0040.00418.41
8.1.140.0040.00417.36
8.1.130.0080.00017.80
8.1.120.0020.00517.34
8.1.110.0000.00717.36
8.1.100.0020.00517.34
8.1.90.0000.00817.41
8.1.80.0040.00417.38
8.1.70.0000.00717.31
8.1.60.0000.00817.46
8.1.50.0040.00417.44
8.1.40.0040.00417.48
8.1.30.0000.00717.52
8.1.20.0030.00617.64
8.1.10.0030.00617.48
8.1.00.0000.00817.38
8.0.300.0000.00719.55
8.0.290.0080.00016.62
8.0.280.0030.00518.36
8.0.270.0000.00717.17
8.0.260.0000.00716.75
8.0.250.0040.00416.90
8.0.240.0030.00516.92
8.0.230.0040.00416.79
8.0.220.0000.00716.82
8.0.210.0050.00316.72
8.0.200.0000.00816.84
8.0.190.0040.00416.90
8.0.180.0000.00716.83
8.0.170.0050.00216.83
8.0.160.0000.00716.71
8.0.150.0030.00316.78
8.0.140.0050.00316.86
8.0.130.0060.00013.23
8.0.120.0040.00416.84
8.0.110.0000.00716.75
8.0.100.0070.00016.70
8.0.90.0000.00816.69
8.0.80.0100.00716.80
8.0.70.0040.00416.93
8.0.60.0040.00416.61
8.0.50.0050.00216.67
8.0.30.0100.00817.15
8.0.20.0060.01417.40
8.0.10.0080.00016.83
8.0.00.0120.01116.60
7.4.330.0020.00315.00
7.4.320.0000.00616.57
7.4.300.0030.00316.44
7.4.290.0070.00016.38
7.4.280.0030.00316.43
7.4.270.0030.00316.44
7.4.260.0080.00416.44
7.4.250.0030.00516.31
7.4.240.0020.00516.40
7.4.230.0000.00716.47
7.4.220.0040.01216.51
7.4.210.0100.00616.51
7.4.200.0070.00016.61
7.4.190.0040.00416.70
7.4.160.0120.00416.35
7.4.150.0060.00917.40
7.4.140.0120.00817.86
7.4.130.0080.01116.43
7.4.120.0070.01016.37
7.4.110.0100.01016.41
7.4.100.0110.01116.56
7.4.90.0120.00616.50
7.4.80.0100.00819.39
7.4.70.0070.01416.37
7.4.60.0090.00616.35
7.4.50.0000.00816.46
7.4.40.0120.00322.77
7.4.30.0110.00416.55
7.4.00.0090.00714.79
7.3.330.0070.00012.95
7.3.320.0050.00013.03
7.3.310.0040.00416.05
7.3.300.0000.00616.00
7.3.290.0040.01116.21
7.3.280.0090.00716.20
7.3.270.0140.00717.40
7.3.260.0100.00716.38
7.3.250.0090.00716.20
7.3.240.0090.01216.24
7.3.230.0070.01016.54
7.3.210.0070.01016.35
7.3.200.0090.01219.39
7.3.190.0060.01616.09
7.3.180.0070.00716.08
7.3.170.0080.00816.30
7.3.160.0070.01316.55
7.3.120.0060.01214.65
7.3.110.0080.00814.93
7.3.100.0030.01015.01
7.3.90.0000.00914.84
7.3.80.0070.00715.05
7.3.70.0040.01114.85
7.3.60.0070.00714.75
7.3.50.0040.01114.41
7.3.40.0090.00314.78
7.3.30.0040.00814.87
7.3.20.0000.01216.19
7.3.10.0040.00816.57
7.3.00.0110.00416.62
7.2.330.0070.01016.29
7.2.320.0100.01016.14
7.2.310.0060.01016.60
7.2.300.0150.00816.55
7.2.290.0130.00316.49
7.2.250.0060.00914.98
7.2.240.0110.00715.03
7.2.230.0070.00415.08
7.2.220.0030.01114.87
7.2.210.0040.01114.64
7.2.200.0090.00414.90
7.2.190.0040.00815.05
7.2.180.0000.00815.01
7.2.170.0030.00714.99
7.2.00.0030.01018.98
7.1.330.0080.00815.66
7.1.320.0060.00615.75
7.1.310.0060.00615.58
7.1.300.0070.00715.46
7.1.290.0080.00415.71
7.1.280.0070.00715.41
7.1.270.0130.00015.78
7.1.260.0090.00315.64
7.1.100.0000.01018.00
7.1.70.0050.00317.07
7.1.60.0040.00717.09
7.1.50.0200.01434.82
7.1.00.0100.07022.42
7.0.200.0000.00716.69
7.0.140.0170.06021.95
7.0.90.0030.08719.98
7.0.80.0000.09019.98
7.0.70.0070.08719.96
7.0.60.0030.04719.99
7.0.50.0070.08020.35
7.0.40.0130.08020.11
7.0.30.0030.08720.09
7.0.20.0230.04320.00
7.0.10.0100.08020.14
7.0.00.0070.04320.14
5.6.280.0070.08721.02
5.6.240.0230.04020.51
5.6.230.0100.08320.66
5.6.220.0200.07020.67
5.6.210.0100.07720.55
5.6.200.0230.07320.96
5.6.190.0100.06020.91
5.6.180.0130.06021.03
5.6.170.0170.07721.13
5.6.160.0070.06321.03
5.6.150.0130.06021.10
5.6.140.0170.06721.10
5.6.130.0000.04721.02
5.6.120.0070.08321.01
5.6.110.0100.04321.06
5.6.100.0100.07321.09
5.6.90.0170.04021.05
5.6.80.0100.04320.54
5.6.70.0170.06320.45
5.6.60.0070.06020.39
5.6.50.0100.03320.42
5.6.40.0000.08320.44
5.6.30.0100.05320.46
5.6.20.0170.07020.36
5.6.10.0030.08720.33
5.6.00.0130.05720.47
5.5.380.0400.03320.39
5.5.370.0030.09020.36
5.5.360.0100.07720.34
5.5.350.0100.07320.32
5.5.340.0070.07720.78
5.5.330.0100.08020.88
5.5.320.0170.07320.82
5.5.310.0070.07720.82
5.5.300.0030.04320.63
5.5.290.0070.04020.87
5.5.280.0030.07720.84
5.5.270.0030.08020.71
5.5.260.0100.04720.84
5.5.250.0170.06020.57
5.5.240.0070.08320.29
5.5.230.0070.07020.25
5.5.220.0100.04320.29
5.5.210.0030.05020.20
5.5.200.0100.07320.17
5.5.190.0070.07020.14
5.5.180.0130.07720.25
5.5.160.0100.06319.98
5.5.150.0070.08720.22
5.5.140.0100.07020.11
5.5.130.0130.06020.17
5.5.120.0100.07720.14
5.5.110.0100.04320.19
5.5.100.0070.04020.15
5.5.90.0100.04320.06
5.5.80.0100.08020.15
5.5.70.0130.07720.09
5.5.60.0030.05320.15
5.5.50.0100.08020.14
5.5.40.0100.07320.13
5.5.30.0170.04719.98
5.5.20.0030.04720.13
5.5.10.0130.06720.02
5.5.00.0070.07320.10
5.4.450.0070.07719.55
5.4.440.0200.03319.30
5.4.430.0070.07719.38
5.4.420.0100.08019.23
5.4.410.0130.06719.22
5.4.400.0000.05318.96
5.4.390.0200.06318.95
5.4.380.0130.06319.14
5.4.370.0070.04719.09
5.4.360.0100.07019.07
5.4.350.0070.04318.97
5.4.340.0100.04318.81
5.4.320.0070.04318.98
5.4.310.0100.08019.23
5.4.300.0100.04719.03
5.4.290.0070.07019.04
5.4.280.0030.04318.80
5.4.270.0000.06019.11
5.4.260.0070.06719.01
5.4.250.0030.08319.14
5.4.240.0130.05018.79
5.4.230.0070.08319.22
5.4.220.0130.07019.25
5.4.210.0100.07319.11
5.4.200.0070.07719.12
5.4.190.0100.07718.97
5.4.180.0000.08319.11
5.4.170.0100.04319.11
5.4.160.0030.08319.05
5.4.150.0100.07719.14
5.4.140.0070.07716.29
5.4.130.0000.04716.33
5.4.120.0100.06716.21
5.4.110.0070.07716.34
5.4.100.0030.08016.45
5.4.90.0070.07016.30
5.4.80.0070.07016.48
5.4.70.0100.05316.34
5.4.60.0100.06316.18
5.4.50.0100.07716.45
5.4.40.0100.07016.29
5.4.30.0270.05316.24
5.4.20.0070.07316.18
5.4.10.0070.05716.19
5.4.00.0070.06015.67
5.3.290.0130.07014.64
5.3.280.0270.05014.41
5.3.270.0100.05014.47
5.3.260.0070.06014.57
5.3.250.0070.07714.55
5.3.240.0000.06714.54
5.3.230.0100.07014.58
5.3.220.0130.06014.55
5.3.210.0000.08014.38
5.3.200.0130.05714.42
5.3.190.0170.06714.39
5.3.180.0070.04714.39
5.3.170.0100.07314.47
5.3.160.0130.05714.49
5.3.150.0100.07014.57
5.3.140.0070.05014.54
5.3.130.0100.07014.52
5.3.120.0000.06714.50
5.3.110.0170.06014.40
5.3.100.0100.04314.02
5.3.90.0030.07313.88
5.3.80.0130.06013.97
5.3.70.0100.04013.77
5.3.60.0030.06013.86
5.3.50.0130.06013.90
5.3.40.0130.03713.90
5.3.30.0130.04713.86
5.3.20.0070.05013.67
5.3.10.0030.05713.43
5.3.00.0070.04713.48
5.2.170.0100.05711.00
5.2.160.0030.04011.06
5.2.150.0030.06311.10
5.2.140.0070.06311.09
5.2.130.0100.05711.09
5.2.120.0070.05711.04
5.2.110.0100.05711.04
5.2.100.0070.03311.09
5.2.90.0130.05710.93
5.2.80.0000.05011.15
5.2.70.0070.06010.89
5.2.60.0030.05710.89
5.2.50.0070.05011.08
5.2.40.0000.04310.81
5.2.30.0070.06010.97
5.2.20.0070.05710.82
5.2.10.0000.06010.87
5.2.00.0070.05710.79
5.1.60.0000.0579.99
5.1.50.0030.0609.97
5.1.40.0030.04710.04
5.1.30.0030.05710.38
5.1.20.0000.05710.37
5.1.10.0030.04010.05
5.1.00.0000.04710.14
5.0.50.0000.0478.59
5.0.40.0030.0438.33
5.0.30.0000.0708.33
5.0.20.0070.0338.33
5.0.10.0000.0478.33
5.0.00.0030.0508.33
4.4.90.0030.0338.33
4.4.80.0030.0338.33
4.4.70.0000.0378.33
4.4.60.0030.0308.33
4.4.50.0030.0338.33
4.4.40.0100.0478.33
4.4.30.0000.0408.33
4.4.20.0000.0338.33
4.4.10.0000.0238.33
4.4.00.0030.0338.33
4.3.110.0030.0338.33
4.3.100.0000.0378.33
4.3.90.0000.0338.33
4.3.80.0000.0438.33
4.3.70.0000.0208.33
4.3.60.0000.0378.33
4.3.50.0070.0308.33
4.3.40.0030.0538.33
4.3.30.0000.0238.33
4.3.20.0000.0408.33
4.3.10.0000.0308.33
4.3.00.0000.0238.33

preferences:
42.6 ms | 400 KiB | 5 Q