3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Recursion implements JsonSerializable { public function __construct() { $this->cnt = 513; } public function jsonSerialize() { if ($this->cnt < 1) { return null; } $this->cnt--; return array($this->cnt => $this); } } var_dump(json_encode(new Recursion(), 0, 1500));

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)
8.3.40.0180.00018.96
8.3.30.0140.00019.11
8.3.20.0070.00020.16
8.3.10.0040.00423.70
8.3.00.0080.00017.63
8.2.170.0120.00922.96
8.2.160.0070.00720.22
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0070.00026.16
8.2.120.0090.00920.88
8.2.110.0030.00921.00
8.2.100.0110.00017.84
8.2.90.0040.00417.84
8.2.80.0080.00017.97
8.2.70.0090.00317.75
8.2.60.0000.00817.92
8.2.50.0040.00418.07
8.2.40.0000.01118.28
8.2.30.0000.00718.01
8.2.20.0000.00717.62
8.2.10.0040.00418.13
8.2.00.0040.00417.69
8.1.270.0080.00023.96
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00922.46
8.1.230.0110.00020.88
8.1.220.0040.00417.74
8.1.210.0080.00018.89
8.1.200.0000.00917.35
8.1.190.0000.00917.13
8.1.180.0040.00418.10
8.1.170.0050.00318.59
8.1.160.0040.00422.03
8.1.150.0070.00018.88
8.1.140.0100.00017.42
8.1.130.0030.00317.87
8.1.120.0050.00317.43
8.1.110.0080.00017.48
8.1.100.0030.00417.47
8.1.90.0040.00717.39
8.1.80.0000.00717.44
8.1.70.0000.00717.37
8.1.60.0060.00317.58
8.1.50.0080.00017.50
8.1.40.0000.00817.58
8.1.30.0030.00517.56
8.1.20.0000.00817.69
8.1.10.0030.00617.40
8.1.00.0000.00717.46
8.0.300.0040.00419.98
8.0.290.0040.00416.75
8.0.280.0040.00418.45
8.0.270.0070.00017.25
8.0.260.0030.00317.27
8.0.250.0030.00316.87
8.0.240.0030.00317.00
8.0.230.0000.00716.93
8.0.220.0040.00416.94
8.0.210.0070.00016.77
8.0.200.0030.00317.00
8.0.190.0040.00416.98
8.0.180.0000.00716.82
8.0.170.0000.00716.90
8.0.160.0000.00716.91
8.0.150.0040.00416.82
8.0.140.0000.00816.89
8.0.130.0030.00313.29
8.0.120.0030.00616.73
8.0.110.0040.00416.86
8.0.100.0070.00016.96
8.0.90.0000.00716.91
8.0.80.0120.00616.87
8.0.70.0000.00816.79
8.0.60.0030.00516.77
8.0.50.0070.00016.86
8.0.30.0190.00616.98
8.0.20.0120.01317.40
8.0.10.0070.00017.07
8.0.00.0090.00916.91
7.4.330.0050.00015.01
7.4.320.0000.00616.59
7.4.300.0030.00316.50
7.4.290.0030.00316.41
7.4.280.0030.00616.49
7.4.270.0070.00016.54
7.4.260.0000.00716.57
7.4.250.0000.00816.48
7.4.240.0000.00716.56
7.4.230.0040.00416.31
7.4.220.0150.00316.49
7.4.210.0090.00616.54
7.4.200.0000.00716.63
7.4.160.0060.00916.51
7.4.150.0130.00717.40
7.4.140.0130.00817.86
7.4.130.0060.01016.57
7.4.120.0070.01116.47
7.4.110.0100.00716.42
7.4.100.0120.00416.70
7.4.90.0170.01016.56
7.4.80.0170.00419.39
7.4.70.0060.01216.57
7.4.60.0090.01216.47
7.4.50.0040.00416.32
7.4.40.0080.01216.42
7.4.30.0090.00616.53
7.4.00.0120.00414.87
7.3.330.0000.00613.08
7.3.320.0000.00513.26
7.3.310.0000.00616.35
7.3.300.0000.00616.34
7.3.290.0070.01416.24
7.3.280.0080.00816.32
7.3.270.0190.04117.40
7.3.260.0070.01016.54
7.3.250.0100.00716.40
7.3.240.0090.00916.37
7.3.230.0100.01016.39
7.3.210.0130.00916.20
7.3.200.0070.01419.39
7.3.190.0060.01116.43
7.3.180.0130.00316.31
7.3.170.0140.00716.27
7.3.160.0110.00716.54
7.2.330.0030.01516.65
7.2.320.0090.00916.49
7.2.310.0070.01116.53
7.2.300.0070.01016.47
7.2.290.0070.01016.49
7.2.00.0090.00619.52
7.1.100.0040.00818.23
7.1.70.0000.00717.20
7.1.60.0030.01719.40
7.1.50.0000.01116.64
7.1.00.0070.07322.40
7.0.200.0100.00016.60
7.0.140.0070.07022.04
7.0.90.0270.06019.87
7.0.80.0070.08019.92
7.0.70.0370.07720.02
7.0.60.0130.05719.88
7.0.50.0000.08720.39
7.0.40.0170.06320.13
7.0.30.0230.06720.06
7.0.20.0130.05020.05
7.0.10.0030.08319.99
7.0.00.0070.07720.13
5.6.240.0030.08720.61
5.6.230.0000.09720.50
5.6.220.0070.08020.68
5.6.210.0070.08020.63
5.6.200.0030.08321.06
5.6.190.0070.08321.05
5.6.180.0030.05020.94
5.6.170.0100.05021.11
5.6.160.0070.04321.11
5.6.150.0200.07021.02
5.6.140.0130.04020.94
5.6.130.0100.06721.18
5.6.120.0130.07021.05
5.6.110.0030.08321.08
5.6.100.0030.05021.13
5.6.90.0130.04720.93
5.6.80.0130.07020.49
5.6.70.0030.07720.52
5.6.60.0000.08020.46
5.6.50.0070.04020.56
5.6.40.0030.05320.46
5.6.30.0030.04320.54
5.6.20.0070.04320.47
5.6.10.0130.06320.39
5.6.00.0130.07020.36
5.5.380.0100.09020.41
5.5.370.0070.08320.40
5.5.360.0100.07720.56
5.5.350.0100.08020.39
5.5.340.0070.05720.84
5.5.330.0030.05020.89
5.5.320.0130.07720.65
5.5.310.0130.07720.77
5.5.300.0070.05320.77
5.5.290.0170.06320.78
5.5.280.0130.07720.65
5.5.270.0100.04720.89
5.5.260.0100.07020.73
5.5.250.0100.04020.62
5.5.240.0170.06320.15
5.5.230.0030.06720.14
5.5.220.0070.07020.17
5.5.210.0100.06320.14
5.5.200.0070.07720.16
5.5.190.0000.08320.27
5.5.180.0030.04320.27
5.5.160.0100.06720.14
5.5.150.0170.06719.99
5.5.140.0070.04320.21
5.5.130.0100.07020.25
5.5.120.0000.09020.15
5.5.110.0070.04320.22
5.5.100.0070.08020.02
5.5.90.0130.07320.12
5.5.80.0030.08319.97
5.5.70.0070.07720.16
5.5.60.0070.07019.94
5.5.50.0130.04020.16
5.5.40.0130.07320.14
5.5.30.0130.07319.93
5.5.20.0200.07020.08
5.5.10.0130.07320.01
5.5.00.0030.04020.11
5.4.450.0030.06319.33
5.4.440.0030.04019.42
5.4.430.0070.07019.29
5.4.420.0130.07719.47
5.4.410.0130.06019.05
5.4.400.0100.05019.14
5.4.390.0070.04319.21
5.4.380.0030.07718.90
5.4.370.0130.05719.18
5.4.360.0130.06319.18
5.4.350.0130.06319.09
5.4.340.0070.06718.87
5.4.320.0100.05319.13
5.4.310.0030.07718.88
5.4.300.0030.06319.12
5.4.290.0130.07319.13
5.4.280.0100.04018.84
5.4.270.0130.07319.04
5.4.260.0070.07319.13
5.4.250.0070.07019.13
5.4.240.0000.07018.86
5.4.230.0000.08019.02
5.4.220.0070.08018.93
5.4.210.0100.07019.07
5.4.200.0070.08019.12
5.4.190.0070.04018.91
5.4.180.0100.07018.94
5.4.170.0100.03319.13
5.4.160.0100.02719.01
5.4.150.0030.03719.18
5.4.140.0030.03716.30
5.4.130.0000.04016.27
5.4.120.0070.04016.50
5.4.110.0030.03716.42
5.4.100.0030.03716.51
5.4.90.0000.03716.33
5.4.80.0030.03716.39
5.4.70.0070.03316.49
5.4.60.0030.04016.33
5.4.50.0070.06016.31
5.4.40.0070.03316.50
5.4.30.0000.04016.39
5.4.20.0030.03716.48
5.4.10.0070.03316.41
5.4.00.0000.04015.80
5.3.290.0130.06714.59
5.3.280.0100.06714.56
5.3.270.0070.04314.54
5.3.260.0000.08314.54
5.3.250.0100.03014.57
5.3.240.0070.03314.66
5.3.230.0030.03714.54
5.3.220.0030.03314.53
5.3.210.0030.05014.69
5.3.200.0030.04014.67
5.3.190.0070.04014.54
5.3.180.0000.04014.56
5.3.170.0070.04014.63
5.3.160.0000.04014.68
5.3.150.0070.06314.53
5.3.140.0100.03014.69
5.3.130.0100.03014.68
5.3.120.0070.04014.68
5.3.110.0000.04014.66
5.3.100.0000.04013.98
5.3.90.0000.04014.05
5.3.80.0070.03014.08
5.3.70.0100.05714.12
5.3.60.0030.03713.93
5.3.50.0070.03314.09
5.3.40.0030.03313.86
5.3.30.0070.03313.89
5.3.20.0030.03313.75
5.3.10.0070.03713.75
5.3.00.0030.03713.57
5.2.170.0000.03311.23
5.2.160.0000.03011.14
5.2.150.0030.03311.16
5.2.140.0030.02711.23
5.2.130.0100.02311.11
5.2.120.0030.02311.04
5.2.110.0000.03011.13
5.2.100.0000.03010.98
5.2.90.0030.03011.21
5.2.80.0070.04710.98
5.2.70.0000.05011.11
5.2.60.0000.03011.11
5.2.50.0030.02711.16
5.2.40.0000.02710.89
5.2.30.0000.04310.86
5.2.20.0000.03310.89
5.2.10.0030.05310.72
5.2.00.0030.02310.82
5.1.60.0000.0279.96
5.1.50.0070.02010.12
5.1.40.0070.02310.04
5.1.30.0070.02010.37
5.1.20.0030.02710.41
5.1.10.0000.02310.21
5.1.00.0000.02710.16
5.0.50.0000.0208.66
5.0.40.0000.0238.30
5.0.30.0000.0308.32
5.0.20.0000.0208.09
5.0.10.0030.0178.21
5.0.00.0000.0308.25
4.4.90.0000.0137.10
4.4.80.0030.0137.10
4.4.70.0000.0177.10
4.4.60.0030.0137.10
4.4.50.0000.0137.10
4.4.40.0000.0277.10
4.4.30.0030.0137.10
4.4.20.0000.0207.10
4.4.10.0000.0177.10
4.4.00.0000.0237.10
4.3.110.0000.0137.10
4.3.100.0030.0107.10
4.3.90.0030.0177.10
4.3.80.0000.0237.10
4.3.70.0030.0137.10
4.3.60.0000.0137.10
4.3.50.0070.0107.10
4.3.40.0030.0207.10
4.3.30.0000.0137.10
4.3.20.0030.0137.10
4.3.10.0000.0207.10
4.3.00.0000.0137.10

preferences:
41.56 ms | 400 KiB | 5 Q