3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Recursion implements JsonSerializable { public function __construct() { $this->cnt = 500; } public function jsonSerialize() { if ($this->cnt < 1) { return null; } $this->cnt--; return array($this->cnt => $this); } } var_dump(json_encode(new Recursion()));

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)
8.3.60.0130.00716.73
8.3.50.0110.00922.93
8.3.40.0120.00918.87
8.3.30.0080.00619.17
8.3.20.0080.00020.32
8.3.10.0000.00723.70
8.3.00.0080.00017.50
8.2.180.0090.00616.75
8.2.170.0170.00322.96
8.2.160.0140.00020.39
8.2.150.0080.00024.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0040.00421.02
8.2.110.0070.00320.28
8.2.100.0040.00819.58
8.2.90.0040.00418.21
8.2.80.0040.00417.97
8.2.70.0030.00617.63
8.2.60.0000.00817.93
8.2.50.0000.00818.07
8.2.40.0000.00818.16
8.2.30.0030.00618.16
8.2.20.0000.00817.81
8.2.10.0040.00418.00
8.2.00.0000.00717.80
8.1.280.0070.00725.92
8.1.270.0090.00023.84
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0000.00922.19
8.1.230.0110.00020.88
8.1.220.0080.00017.77
8.1.210.0040.00418.85
8.1.200.0080.00017.35
8.1.190.0000.00817.35
8.1.180.0050.00318.10
8.1.170.0030.00718.59
8.1.160.0040.00422.02
8.1.150.0000.00718.86
8.1.140.0000.00917.43
8.1.130.0040.00417.75
8.1.120.0030.00517.46
8.1.110.0070.00017.43
8.1.100.0000.00717.36
8.1.90.0000.01117.41
8.1.80.0000.00717.36
8.1.70.0040.00417.43
8.1.60.0030.00517.52
8.1.50.0000.00717.38
8.1.40.0000.00717.51
8.1.30.0050.00317.64
8.1.20.0040.00417.73
8.1.10.0060.00317.39
8.1.00.0040.00417.43
8.0.300.0080.00019.93
8.0.290.0040.00416.63
8.0.280.0000.00718.41
8.0.270.0030.00317.23
8.0.260.0070.00017.25
8.0.250.0030.00317.00
8.0.240.0000.00717.00
8.0.230.0000.00816.95
8.0.220.0000.00716.91
8.0.210.0040.00416.80
8.0.200.0000.00717.06
8.0.190.0080.00016.93
8.0.180.0000.00716.94
8.0.170.0030.00516.83
8.0.160.0040.00416.77
8.0.150.0040.00416.93
8.0.140.0000.00716.88
8.0.130.0000.00813.30
8.0.120.0030.00516.86
8.0.110.0000.00716.84
8.0.100.0000.00716.95
8.0.90.0000.00716.79
8.0.80.0040.01216.79
8.0.70.0060.00316.95
8.0.60.0000.00816.73
8.0.50.0000.00716.80
8.0.30.0100.01517.03
8.0.20.0160.00517.40
8.0.10.0000.00817.03
8.0.00.0080.00816.68
7.4.330.0050.00015.07
7.4.320.0000.00716.62
7.4.300.0060.00016.59
7.4.290.0000.00716.53
7.4.280.0080.00016.59
7.4.270.0050.00316.65
7.4.260.0000.00816.60
7.4.250.0040.00416.48
7.4.240.0020.00616.63
7.4.230.0040.00316.63
7.4.220.0040.01416.60
7.4.210.0100.01016.62
7.4.200.0060.00016.52
7.4.160.0100.00716.41
7.4.150.0130.00617.40
7.4.140.0070.01017.86
7.4.130.0130.00316.54
7.4.120.0090.00816.59
7.4.110.0070.01016.49
7.4.100.0080.00816.51
7.4.90.0070.01416.33
7.4.80.0110.01419.39
7.4.70.0090.00916.56
7.4.60.0090.00916.71
7.4.50.0030.00516.21
7.4.40.0030.01416.32
7.4.30.0100.00716.47
7.4.00.0090.00015.05
7.3.330.0000.00713.31
7.3.320.0050.00013.32
7.3.310.0070.00016.28
7.3.300.0050.00216.29
7.3.290.0110.00316.35
7.3.280.0100.00516.27
7.3.270.0030.01317.40
7.3.260.0060.01016.30
7.3.250.0110.00516.38
7.3.240.0080.00816.59
7.3.230.0100.00716.41
7.3.210.0050.01116.48
7.3.200.0120.00619.39
7.3.190.0130.00316.46
7.3.180.0070.01016.49
7.3.170.0150.00316.63
7.3.160.0100.00716.41
7.2.330.0090.01116.86
7.2.320.0060.01216.49
7.2.310.0060.01016.70
7.2.300.0070.01016.57
7.2.290.0090.00916.55
7.2.110.0130.00616.56
7.2.60.0100.00717.11
7.2.00.0140.00319.30
7.1.200.0070.00715.74
7.1.100.0070.00317.92
7.1.70.0060.00317.28
7.1.60.0130.01019.40
7.1.50.0030.01716.86
7.1.00.0000.08022.28
7.0.200.1520.00014.98
7.0.140.0030.07322.12
7.0.90.0570.05019.89
7.0.80.0570.09019.99
7.0.70.0470.07020.01
7.0.60.0070.06019.85
7.0.50.0570.08020.40
7.0.40.0170.06320.00
7.0.30.0070.04020.11
7.0.20.0030.08020.10
7.0.10.0100.07320.14
7.0.00.0130.07320.12
5.6.280.0100.06721.16
5.6.240.0100.08020.61
5.6.230.0130.07020.67
5.6.220.0130.07320.58
5.6.210.0070.07720.62
5.6.200.0100.07721.12
5.6.190.0070.07321.03
5.6.180.0200.06721.14
5.6.170.0070.08321.00
5.6.160.0070.04721.08
5.6.150.0170.07021.18
5.6.140.0130.05321.04
5.6.130.0030.05021.11
5.6.120.0130.08021.06
5.6.110.0100.08021.01
5.6.100.0170.07721.03
5.6.90.0000.09720.95
5.6.80.0100.08020.43
5.6.70.0100.06320.42
5.6.60.0130.03320.32
5.6.50.0070.05320.39
5.6.40.0130.04320.46
5.6.30.0100.04020.47
5.6.20.0130.05020.44
5.6.10.0100.08320.46
5.6.00.0030.05720.52
5.5.380.0070.06020.46
5.5.370.0100.07720.38
5.5.360.0170.05020.35
5.5.350.0070.08020.31
5.5.340.0070.08320.73
5.5.330.0130.06720.92
5.5.320.0170.07320.73
5.5.310.0230.07320.78
5.5.300.0030.08320.89
5.5.290.0030.05320.76
5.5.280.0070.08320.86
5.5.270.0170.07320.90
5.5.260.0100.04720.64
5.5.250.0070.07720.69
5.5.240.0130.05020.30
5.5.230.0070.04020.16
5.5.220.0070.04320.11
5.5.210.0130.04720.29
5.5.200.0000.09020.24
5.5.190.0070.05320.16
5.5.180.0130.03720.09
5.5.160.0130.06720.25
5.5.150.0130.05020.23
5.5.140.0100.06320.23
5.5.130.0130.07320.22
5.5.120.0070.04320.11
5.5.110.0070.04020.11
5.5.100.0070.04320.17
5.5.90.0100.07320.10
5.5.80.0070.07720.10
5.5.70.0070.08020.06
5.5.60.0130.07020.16
5.5.50.0100.03320.05
5.5.40.0130.07020.04
5.5.30.0100.07720.15
5.5.20.0000.07320.08
5.5.10.0030.06020.06
5.5.00.0130.06020.12
5.4.450.0170.07719.42
5.4.440.0030.05319.45
5.4.430.0100.04019.41
5.4.420.0070.05719.55
5.4.410.0100.04719.38
5.4.400.0000.04718.84
5.4.390.0070.04719.03
5.4.380.0130.04318.88
5.4.370.0100.03719.11
5.4.360.0100.07319.16
5.4.350.0130.06019.02
5.4.340.0100.04019.04
5.4.320.0000.08319.13
5.4.310.0100.07318.89
5.4.300.0030.06319.20
5.4.290.0000.05019.20
5.4.280.0030.04319.09
5.4.270.0070.06019.18
5.4.260.0030.04018.88
5.4.250.0100.07719.02
5.4.240.0170.07319.02
5.4.230.0070.04719.11
5.4.220.0070.04019.03
5.4.210.0070.07019.04
5.4.200.0100.05319.13
5.4.190.0030.08319.13
5.4.180.0100.07319.13
5.4.170.0030.08019.06
5.4.160.0070.04319.16
5.4.150.0070.04018.86
5.4.140.0030.04016.29
5.4.130.0030.05316.30
5.4.120.0100.07016.36
5.4.110.0070.05316.36
5.4.100.0100.06316.32
5.4.90.0070.06316.39
5.4.80.0100.05016.25
5.4.70.0030.06016.42
5.4.60.0000.04316.40
5.4.50.0070.04316.32
5.4.40.0100.06716.41
5.4.30.0130.07016.71
5.4.20.0030.06016.67
5.4.10.0070.06316.55
5.4.00.0100.05716.05
5.3.290.0130.06314.62
5.3.280.0100.03714.56
5.3.270.0000.05314.71
5.3.260.0130.07314.72
5.3.250.0100.08014.62
5.3.240.0100.07314.67
5.3.230.0070.07314.54
5.3.220.0070.04314.68
5.3.210.0070.07714.68
5.3.200.0030.06714.54
5.3.190.0070.05314.61
5.3.180.0100.07014.48
5.3.170.0100.07314.67
5.3.160.0030.04014.61
5.3.150.0100.03314.49
5.3.140.0070.06314.48
5.3.130.0070.04714.53
5.3.120.0070.07714.69
5.3.110.0070.04314.68
5.3.100.0170.04013.99
5.3.90.0030.07714.07
5.3.80.0130.07014.00
5.3.70.0030.06313.93
5.3.60.0100.07313.98
5.3.50.0030.04014.00
5.3.40.0100.06714.06
5.3.30.0030.03713.96
5.3.20.0070.06313.80
5.3.10.0070.07313.56
5.3.00.0030.05013.76
5.2.170.0030.06011.01
5.2.160.0030.03710.97
5.2.150.0070.03011.25
5.2.140.0070.06011.28
5.2.130.0000.06311.02
5.2.120.0030.05311.01
5.2.110.0030.04011.09
5.2.100.0030.06311.14
5.2.90.0000.06310.99
5.2.80.0000.03711.11
5.2.70.0000.03711.01
5.2.60.0100.05711.11
5.2.50.0070.02710.89
5.2.40.0000.03311.02
5.2.30.0000.03310.89
5.2.20.0030.04311.02
5.2.10.0030.03310.72
5.2.00.0100.02710.74
5.1.60.0000.0309.89
5.1.50.0070.03710.11
5.1.40.0030.0239.96
5.1.30.0030.03010.36
5.1.20.0000.03010.36
5.1.10.0000.02710.11
5.1.00.0000.05010.15
5.0.50.0000.0208.59
5.0.40.0000.0308.41
5.0.30.0000.0438.32
5.0.20.0030.0338.25
5.0.10.0000.0208.17
5.0.00.0000.0578.21
4.4.90.0070.0277.83
4.4.80.0030.0177.83
4.4.70.0000.0207.83
4.4.60.0030.0137.83
4.4.50.0030.0207.83
4.4.40.0000.0277.83
4.4.30.0000.0177.83
4.4.20.0000.0237.83
4.4.10.0000.0177.83
4.4.00.0030.0377.83
4.3.110.0000.0177.83
4.3.100.0070.0307.83
4.3.90.0030.0237.83
4.3.80.0000.0277.83
4.3.70.0070.0237.83
4.3.60.0000.0207.83
4.3.50.0000.0207.83
4.3.40.0000.0507.83
4.3.30.0070.0307.83
4.3.20.0100.0207.83
4.3.10.0070.0207.83
4.3.00.0000.0177.83

preferences:
42.23 ms | 401 KiB | 5 Q