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; } $this->cnt--; var_dump($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)
8.3.60.0090.00616.63
8.3.50.0110.00522.88
8.3.40.0070.01418.76
8.3.30.0100.00319.09
8.3.20.0070.00020.35
8.3.10.0070.00023.65
8.3.00.0040.00417.50
8.2.180.0060.00916.75
8.2.170.0110.00419.09
8.2.160.0110.00322.96
8.2.150.0090.00024.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0070.00021.07
8.2.110.0090.00020.78
8.2.100.0120.00018.03
8.2.90.0080.00019.26
8.2.80.0040.00417.97
8.2.70.0030.00617.50
8.2.60.0080.00018.16
8.2.50.0090.00018.07
8.2.40.0030.00518.07
8.2.30.0040.00418.00
8.2.20.0060.00317.63
8.2.10.0040.00418.13
8.2.00.0000.00917.71
8.1.280.0110.00425.92
8.1.270.0040.01423.91
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0060.00322.10
8.1.230.0080.00318.95
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0000.00917.35
8.1.190.0000.00817.35
8.1.180.0000.00818.10
8.1.170.0050.00318.71
8.1.160.0040.00422.01
8.1.150.0050.00218.84
8.1.140.0060.00317.56
8.1.130.0000.00817.88
8.1.120.0000.00717.55
8.1.110.0040.00417.47
8.1.100.0020.00517.50
8.1.90.0070.00317.45
8.1.80.0080.00017.36
8.1.70.0040.00417.48
8.1.60.0040.00417.48
8.1.50.0040.00417.54
8.1.40.0040.00417.55
8.1.30.0030.00617.68
8.1.20.0080.00017.66
8.1.10.0030.00517.53
8.1.00.0000.00817.39
8.0.300.0040.00420.04
8.0.290.0070.00016.63
8.0.280.0030.00318.46
8.0.270.0030.00317.20
8.0.260.0030.00317.26
8.0.250.0070.00017.00
8.0.240.0000.00716.99
8.0.230.0040.00416.83
8.0.220.0030.00316.80
8.0.210.0030.00516.94
8.0.200.0000.00716.88
8.0.190.0000.00716.88
8.0.180.0030.00516.82
8.0.170.0030.00516.86
8.0.160.0040.00417.02
8.0.150.0070.00016.79
8.0.140.0000.00716.85
8.0.130.0060.00313.36
8.0.120.0070.00016.82
8.0.110.0070.00016.88
8.0.100.0050.00216.77
8.0.90.0040.00416.85
8.0.80.0090.00616.89
8.0.70.0070.00316.89
8.0.60.0000.00816.86
8.0.50.0000.00716.72
8.0.30.0140.00817.06
8.0.20.0100.00817.41
8.0.10.0000.00816.97
8.0.00.0110.00616.82
7.4.330.0050.00015.15
7.4.320.0060.00016.59
7.4.300.0030.00316.61
7.4.290.0030.00316.52
7.4.280.0000.00816.47
7.4.270.0070.00016.52
7.4.260.0000.00816.57
7.4.250.0040.00416.56
7.4.240.0040.00416.54
7.4.230.0070.00016.46
7.4.220.0070.01116.55
7.4.210.0030.01116.57
7.4.200.0030.00316.39
7.4.160.0100.01016.66
7.4.150.0160.00617.40
7.4.140.0110.00617.86
7.4.130.0090.00716.57
7.4.120.0080.00916.63
7.4.110.0070.01016.57
7.4.100.0090.00916.46
7.4.90.0030.01416.46
7.4.80.0070.02019.39
7.4.70.0070.01016.57
7.4.60.0120.00616.41
7.4.50.0030.00516.49
7.4.40.0000.01816.51
7.4.30.0130.00316.73
7.4.00.0040.01115.21
7.3.330.0060.00013.07
7.3.320.0050.00013.17
7.3.310.0000.00716.27
7.3.300.0030.00316.30
7.3.290.0060.00916.30
7.3.280.0080.00816.30
7.3.270.0100.00717.40
7.3.260.0110.00716.25
7.3.250.0080.00816.24
7.3.240.0030.01316.25
7.3.230.0100.00716.39
7.3.210.0090.00916.66
7.3.200.0070.01019.39
7.3.190.0110.00616.29
7.3.180.0080.00816.20
7.3.170.0060.01016.52
7.3.160.0080.00816.13
7.3.120.0030.01314.81
7.3.110.0090.00315.10
7.3.100.0000.01414.73
7.3.90.0030.00614.77
7.3.80.0090.00614.45
7.3.70.0030.00714.68
7.3.60.0030.01214.46
7.3.50.0030.00614.48
7.3.40.0070.00314.45
7.3.30.0070.00714.55
7.3.20.0070.00416.39
7.3.10.0100.00716.59
7.3.00.0040.00716.66
7.2.330.0080.01116.69
7.2.320.0100.00816.51
7.2.310.0030.01316.65
7.2.300.0110.00616.59
7.2.290.0090.01016.60
7.2.240.0000.01314.91
7.2.230.0030.01015.30
7.2.220.0060.00614.93
7.2.210.0090.00315.27
7.2.200.0090.00614.88
7.2.190.0030.01115.13
7.2.180.0030.01215.03
7.2.170.0040.01514.84
7.2.160.0070.01014.84
7.2.150.0070.01016.70
7.2.140.0060.00616.90
7.2.130.0040.01416.69
7.2.120.0000.01216.77
7.2.110.0120.00316.94
7.2.100.0070.01016.54
7.2.90.0100.00717.12
7.2.80.0080.00417.04
7.2.70.0030.01316.80
7.2.60.0030.01116.64
7.2.50.0060.01016.74
7.2.40.0070.01116.55
7.2.30.0120.00617.09
7.2.20.0090.00616.75
7.2.10.0100.00717.07
7.2.00.0100.00817.90
7.1.330.0000.00915.72
7.1.320.0090.00315.79
7.1.310.0000.01415.70
7.1.300.0000.01415.36
7.1.290.0130.00315.58
7.1.280.0070.00315.48
7.1.270.0070.01015.73
7.1.260.0040.01115.43
7.1.250.0100.00315.57
7.1.200.0120.00415.82
7.1.100.0040.00718.32
7.1.70.0000.00717.09
7.1.60.0110.01419.40
7.1.50.0040.01816.63
7.1.00.0030.07322.31
7.0.200.0000.00914.99
7.0.140.0130.06722.09
7.0.90.0470.07319.95
7.0.80.0400.09020.01
7.0.70.0500.07019.90
7.0.60.0600.04719.97
7.0.50.0500.08720.35
7.0.40.0030.08319.99
7.0.30.0000.08320.10
7.0.20.0100.04020.13
7.0.10.0170.07019.94
7.0.00.0070.08720.02
5.6.280.0070.06721.00
5.6.240.0030.05720.64
5.6.230.0100.08020.63
5.6.220.0100.05020.63
5.6.210.0100.08320.66
5.6.200.0170.07021.06
5.6.190.0170.07021.02
5.6.180.0030.08721.05
5.6.170.0130.07021.11
5.6.160.0100.05320.96
5.6.150.0100.05321.03
5.6.140.0000.04721.06
5.6.130.0000.08021.02
5.6.120.0130.04321.11
5.6.110.0070.06021.13
5.6.100.0130.08021.05
5.6.90.0130.08021.09
5.6.80.0170.07020.43
5.6.70.0030.08320.56
5.6.60.0100.03720.39
5.6.50.0130.04020.42
5.6.40.0030.04320.46
5.6.30.0070.03720.50
5.6.20.0070.04020.30
5.6.10.0000.04320.31
5.6.00.0030.04020.36
5.5.380.0170.06720.50
5.5.370.0070.04720.37
5.5.360.0070.07720.35
5.5.350.0070.08320.35
5.5.340.0030.04320.65
5.5.330.0100.08020.88
5.5.320.0100.03720.85
5.5.310.0100.07320.93
5.5.300.0130.08020.88
5.5.290.0100.05720.91
5.5.280.0070.04020.93
5.5.270.0170.07020.82
5.5.260.0100.08320.89
5.5.250.0100.05320.55
5.5.240.0070.04720.14
5.5.230.0100.07320.14
5.5.220.0070.06320.02
5.5.210.0070.05020.24
5.5.200.0030.06720.24
5.5.190.0030.04320.23
5.5.180.0130.03020.25
5.5.160.0070.04020.16
5.5.150.0100.04020.12
5.5.140.0030.04020.18
5.5.130.0100.03720.18
5.5.120.0030.04020.13
5.5.110.0000.04320.23
5.5.100.0030.04020.11
5.5.90.0070.03320.07
5.5.80.0030.04020.18
5.5.70.0030.04020.05
5.5.60.0100.05320.09
5.5.50.0000.04020.09
5.5.40.0030.03720.09
5.5.30.0030.04320.05
5.5.20.0030.03720.09
5.5.10.0070.03320.04
5.5.00.0030.04020.04
5.4.450.0100.08319.46
5.4.440.0170.07319.37
5.4.430.0100.06019.41
5.4.420.0100.07319.28
5.4.410.0230.06019.42
5.4.400.0070.07719.14
5.4.390.0030.08018.95
5.4.380.0070.06719.04
5.4.370.0070.06018.95
5.4.360.0030.04019.05
5.4.350.0100.05719.05
5.4.340.0100.06018.88
5.4.320.0070.03718.90
5.4.310.0030.03718.85
5.4.300.0070.03319.02
5.4.290.0070.03319.14
5.4.280.0100.06019.13
5.4.270.0070.04319.16
5.4.260.0030.04019.04
5.4.250.0000.04019.02
5.4.240.0030.03719.13
5.4.230.0070.03318.94
5.4.220.0000.04019.17
5.4.210.0000.04019.04
5.4.200.0000.04019.12
5.4.190.0100.03019.11
5.4.180.0100.04019.03
5.4.170.0070.04719.11
5.4.160.0030.03718.92
5.4.150.0030.04319.01
5.4.140.0030.03716.29
5.4.130.0000.04316.14
5.4.120.0030.03016.29
5.4.110.0100.02716.43
5.4.100.0000.03716.50
5.4.90.0030.03716.39
5.4.80.0030.03716.30
5.4.70.0070.04316.30
5.4.60.0000.03716.54
5.4.50.0100.03016.46
5.4.40.0070.03316.45
5.4.30.0100.03316.56
5.4.20.0030.03716.61
5.4.10.0000.04316.60
5.4.00.0000.04015.98
5.3.290.0000.04014.59
5.3.280.0070.03314.55
5.3.270.0070.03714.63
5.3.260.0030.04014.74
5.3.250.0000.04314.65
5.3.240.0000.03314.71
5.3.230.0030.03714.73
5.3.220.0030.03714.54
5.3.210.0030.03714.63
5.3.200.0030.03714.59
5.3.190.0100.07014.58
5.3.180.0030.03714.61
5.3.170.0000.04014.57
5.3.160.0030.03714.68
5.3.150.0070.03014.58
5.3.140.0070.03714.50
5.3.130.0000.04014.68
5.3.120.0000.04314.54
5.3.110.0030.04014.61
5.3.100.0000.04014.10
5.3.90.0000.03714.16
5.3.80.0070.03013.95
5.3.70.0030.05314.11
5.3.60.0030.06014.09
5.3.50.0030.07014.05
5.3.40.0070.04714.00
5.3.30.0070.03714.00
5.3.20.0000.07313.58
5.3.10.0030.06313.76
5.3.00.0030.06713.76
5.2.170.0100.02011.26
5.2.160.0030.03311.04
5.2.150.0030.06011.25
5.2.140.0100.04711.16
5.2.130.0000.03711.00
5.2.120.0100.06010.93
5.2.110.0030.03711.21
5.2.100.0070.03311.03
5.2.90.0030.03311.09
5.2.80.0000.03711.23
5.2.70.0030.03311.12
5.2.60.0030.05011.06
5.2.50.0000.05311.16
5.2.40.0030.06311.00
5.2.30.0030.06310.86
5.2.20.0100.06010.86
5.2.10.0070.06010.88
5.2.00.0100.05310.63
5.1.60.0100.04010.09
5.1.50.0000.06010.07
5.1.40.0100.05010.06
5.1.30.0000.05010.40
5.1.20.0030.05710.38
5.1.10.0070.05710.08
5.1.00.0000.05310.07
5.0.50.0030.0438.61
5.0.40.0070.0408.30
5.0.30.0030.0578.30
5.0.20.0000.0338.23
5.0.10.0000.0478.25
5.0.00.0000.0508.27
4.4.90.0000.0407.13
4.4.80.0000.0207.13
4.4.70.0070.0307.13
4.4.60.0000.0307.13
4.4.50.0000.0237.13
4.4.40.0000.0337.13
4.4.30.0030.0377.13
4.4.20.0070.0337.13
4.4.10.0070.0307.13
4.4.00.0070.0307.13
4.3.110.0030.0337.13
4.3.100.0000.0277.13
4.3.90.0030.0337.13
4.3.80.0030.0377.13
4.3.70.0030.0337.13
4.3.60.0030.0307.13
4.3.50.0000.0307.13
4.3.40.0000.0537.13
4.3.30.0000.0377.13
4.3.20.0000.0307.13
4.3.10.0030.0177.13
4.3.00.0000.0307.13

preferences:
41.33 ms | 401 KiB | 5 Q