3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Recursion implements JsonSerializable { public function __construct() { $this->cnt = 15; } public function jsonSerialize() { if ($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)
8.3.70.0220.00016.63
8.3.60.0000.01416.75
8.3.50.0130.00522.90
8.3.40.0100.00718.97
8.3.30.0000.01419.10
8.3.20.0040.00420.36
8.3.10.0070.00023.66
8.3.00.0080.00017.63
8.2.180.0100.01018.29
8.2.170.0070.01122.96
8.2.160.0110.00420.42
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00421.04
8.2.110.0000.00921.11
8.2.100.0090.00317.91
8.2.90.0080.00019.14
8.2.80.0040.00417.97
8.2.70.0060.00317.75
8.2.60.0080.00017.93
8.2.50.0030.00618.07
8.2.40.0080.00418.28
8.2.30.0000.00818.14
8.2.20.0040.00417.71
8.2.10.0000.00818.11
8.2.00.0060.00317.75
8.1.280.0110.00425.92
8.1.270.0030.00523.79
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00922.81
8.1.230.0040.00820.97
8.1.220.0030.00617.76
8.1.210.0080.00018.77
8.1.200.0030.00617.35
8.1.190.0090.00017.23
8.1.180.0040.00418.10
8.1.170.0000.00818.71
8.1.160.0080.00022.07
8.1.150.0000.00718.77
8.1.140.0060.00317.48
8.1.130.0030.00517.77
8.1.120.0030.00517.54
8.1.110.0070.00017.43
8.1.100.0040.00417.48
8.1.90.0000.01017.35
8.1.80.0050.00217.47
8.1.70.0040.00417.47
8.1.60.0000.00817.65
8.1.50.0040.00417.43
8.1.40.0060.00317.55
8.1.30.0040.00417.63
8.1.20.0000.00717.66
8.1.10.0000.00717.38
8.1.00.0000.00717.43
8.0.300.0070.00018.77
8.0.290.0030.00616.75
8.0.280.0070.00018.39
8.0.270.0030.00417.17
8.0.260.0060.00017.31
8.0.250.0030.00317.02
8.0.240.0000.00716.97
8.0.230.0070.00016.98
8.0.220.0070.00016.88
8.0.210.0040.00416.80
8.0.200.0060.00016.95
8.0.190.0000.00716.82
8.0.180.0000.00816.89
8.0.170.0080.00016.95
8.0.160.0030.00516.88
8.0.150.0000.00816.89
8.0.140.0040.00416.77
8.0.130.0050.00213.29
8.0.120.0030.00516.76
8.0.110.0040.00416.73
8.0.100.0050.00216.78
8.0.90.0030.00316.94
8.0.80.0070.01016.85
8.0.70.0000.00816.90
8.0.60.0000.00716.94
8.0.50.0000.00716.77
8.0.30.0090.01416.91
8.0.20.0150.01217.40
8.0.10.0070.00017.08
8.0.00.0120.00716.88
7.4.330.0000.00615.07
7.4.320.0030.00316.59
7.4.300.0070.00016.64
7.4.290.0070.00016.63
7.4.280.0050.00316.53
7.4.270.0030.00316.51
7.4.260.0000.00716.45
7.4.250.0020.00516.55
7.4.240.0040.00416.51
7.4.230.0040.00316.70
7.4.220.0120.00616.51
7.4.210.0070.00716.56
7.4.200.0070.00016.63
7.4.160.0130.01016.35
7.4.150.0200.04117.40
7.4.140.0150.00817.86
7.4.130.0100.00716.52
7.4.120.0100.01016.47
7.4.110.0120.00616.30
7.4.100.0130.00316.64
7.4.90.0130.00316.49
7.4.80.0080.01419.39
7.4.70.0130.00616.55
7.4.60.0060.01216.43
7.4.50.0000.00816.63
7.4.40.0040.01616.50
7.4.30.0130.00316.74
7.4.00.0000.01615.23
7.3.330.0070.00013.32
7.3.320.0050.00013.32
7.3.310.0000.00716.33
7.3.300.0000.00716.30
7.3.290.0030.01016.30
7.3.280.0070.01016.29
7.3.270.0120.00617.40
7.3.260.0070.01016.49
7.3.250.0050.01116.46
7.3.240.0140.00716.35
7.3.230.0080.01116.39
7.3.210.0130.00316.17
7.3.200.0110.01119.39
7.3.190.0090.01216.28
7.3.180.0090.01216.28
7.3.170.0090.00916.44
7.3.160.0060.00916.21
7.3.00.0110.00416.73
7.2.330.0100.01316.77
7.2.320.0110.00716.40
7.2.310.0090.01316.80
7.2.300.0040.01816.77
7.2.290.0030.01716.45
7.2.130.0150.00716.86
7.2.120.0080.01116.80
7.2.110.0130.00616.99
7.2.100.0180.00316.71
7.2.90.0080.00417.13
7.2.80.0130.00316.97
7.2.70.0090.00917.04
7.2.60.0000.01216.52
7.2.50.0120.00016.92
7.2.40.0040.01016.87
7.2.30.0030.00716.81
7.2.20.0030.00616.82
7.2.10.0060.00617.07
7.2.00.0100.01016.85
7.1.250.0090.00915.56
7.1.240.0030.01215.64
7.1.230.0120.00215.73
7.1.220.0050.00815.71
7.1.210.0040.00715.60
7.1.200.0030.01015.79
7.1.190.0100.00315.41
7.1.180.0070.00715.72
7.1.170.0040.00415.57
7.1.160.0070.00315.63
7.1.150.0030.00915.83
7.1.140.0090.00615.60
7.1.130.0060.00515.53
7.1.120.0070.00315.65
7.1.110.0160.00615.89
7.1.100.0100.00315.59
7.1.90.0060.00915.84
7.1.80.0110.01115.84
7.1.70.0080.00416.35
7.1.60.0110.01117.45
7.1.50.0020.01116.41
7.1.40.0070.00715.76
7.1.30.0100.01015.43
7.1.20.0100.00315.80
7.1.10.0070.00715.66
7.1.00.0050.04318.93
7.0.330.0120.00715.36
7.0.320.0070.00715.31
7.0.310.0090.00615.37
7.0.300.0070.00715.25
7.0.290.0050.00515.36
7.0.280.0100.00315.26
7.0.270.0100.00615.38
7.0.260.0040.01115.08
7.0.250.0070.00715.30
7.0.240.0070.00415.36
7.0.230.0080.01115.25
7.0.220.0100.00715.47
7.0.210.0080.00814.98
7.0.200.0060.00815.88
7.0.190.0040.00715.30
7.0.180.0100.00215.39
7.0.170.0140.00615.43
7.0.160.0090.00615.40
7.0.150.0060.00615.33
7.0.140.0070.03918.70
7.0.130.0040.00814.96
7.0.120.0140.00915.46
7.0.110.0050.00515.43
7.0.100.0060.00915.15
7.0.90.0360.03917.73
7.0.80.0250.02917.65
7.0.70.0310.03817.75
7.0.60.0230.02917.62
7.0.50.0330.02717.95
7.0.40.0070.04416.83
7.0.30.0050.04416.66
7.0.20.0050.04416.61
7.0.10.0080.04316.90
7.0.00.0070.04716.83
5.6.380.0000.01214.38
5.6.370.0120.00014.49
5.6.360.0090.00614.14
5.6.350.0130.00014.18
5.6.340.0070.00714.51
5.6.330.0040.00414.46
5.6.320.0050.00514.15
5.6.310.0040.01114.58
5.6.300.0060.00613.86
5.6.290.0110.00314.32
5.6.280.0120.03517.86
5.6.270.0110.00414.21
5.6.260.0070.00714.35
5.6.250.0090.00914.47
5.6.240.0170.03517.29
5.6.230.0070.03217.51
5.6.220.0060.02817.56
5.6.210.0130.03817.57
5.6.200.0100.02317.64
5.6.190.0020.04717.69
5.6.180.0050.03017.67
5.6.170.0070.04517.62
5.6.160.0120.03217.71
5.6.150.0100.02517.59
5.6.140.0030.03317.70
5.6.130.0060.03017.81
5.6.120.0070.04517.82
5.6.110.0100.04117.75
5.6.100.0040.03417.64
5.6.90.0090.04717.81
5.6.80.0080.04117.51
5.6.70.0070.04317.36
5.6.60.0050.02817.34
5.6.50.0070.03017.31
5.6.40.0070.04217.20
5.6.30.0070.04017.29
5.6.20.0110.03917.31
5.6.10.0040.02917.41
5.6.00.0090.04217.46
5.5.380.0070.04315.76
5.5.370.0080.04015.71
5.5.360.0080.04315.64
5.5.350.0030.04215.79
5.5.340.0110.03515.93
5.5.330.0030.04115.92
5.5.320.0040.03716.01
5.5.310.0030.04315.89
5.5.300.0030.02615.98
5.5.290.0030.02816.05
5.5.280.0050.03016.01
5.5.270.0080.02315.89
5.5.260.0000.04715.98
5.5.250.0010.05115.97
5.5.240.0070.04015.72
5.5.230.0050.04315.78
5.5.220.0050.04115.56
5.5.210.0030.04515.72
5.5.200.0110.03315.62
5.5.190.0130.02315.62
5.5.180.0080.03715.70
5.5.170.0030.00611.27
5.5.160.0080.02015.71
5.5.150.0050.04315.50
5.5.140.0070.04115.72
5.5.130.0080.03415.62
5.5.120.0050.02715.63
5.5.110.0060.03115.73
5.5.100.0140.03015.76
5.5.90.0070.03915.45
5.5.80.0060.04115.53
5.5.70.0070.04015.39
5.5.60.0070.04215.49
5.5.50.0060.04015.56
5.5.40.0030.04215.59
5.5.30.0050.02515.46
5.5.20.0070.03715.56
5.5.10.0080.03815.62
5.5.00.0090.02015.70
5.4.450.0070.03815.28
5.4.440.0080.02315.19
5.4.430.0050.04215.32
5.4.420.0020.04515.13
5.4.410.0100.04114.98
5.4.400.0080.04015.11
5.4.390.0140.03414.96
5.4.380.0100.03815.06
5.4.370.0050.02115.19
5.4.360.0060.02114.99
5.4.350.0070.02014.96
5.4.340.0030.04015.07
5.4.330.0030.00810.96
5.4.320.0050.03815.15
5.4.310.0070.03515.00
5.4.300.0100.03714.87
5.4.290.0090.03515.08
5.4.280.0050.03114.79
5.4.270.0050.04314.93
5.4.260.0050.03815.07
5.4.250.0050.04015.00
5.4.240.0020.04514.92
5.4.230.0040.03314.66
5.4.220.0070.03814.94
5.4.210.0110.03514.75
5.4.200.0100.03314.89
5.4.190.0030.04215.01
5.4.180.0050.04314.96
5.4.170.0090.02015.10
5.4.160.0150.03315.13
5.4.150.0050.03814.96
5.4.140.0070.02513.97
5.4.130.0120.02813.77
5.4.120.0050.03513.74
5.4.110.0070.02313.77
5.4.100.0060.02513.59
5.4.90.0110.03113.63
5.4.80.0120.01813.61
5.4.70.0070.03513.67
5.4.60.0050.02613.64
5.4.50.0060.03713.82
5.4.40.0100.03513.79
5.4.30.0030.04413.63
5.4.20.0090.03713.84
5.4.10.0030.03613.78
5.4.00.0040.02113.33
5.3.290.0000.03112.62
5.3.280.0060.02312.27
5.3.270.0050.03012.50
5.3.260.0090.03312.55
5.3.250.0040.03912.43
5.3.240.0050.02812.31
5.3.230.0080.02512.46
5.3.220.0050.03512.43
5.3.210.0050.04012.41
5.3.200.0050.02312.38
5.3.190.0130.01812.44
5.3.180.0070.03312.50
5.3.170.0120.03312.35
5.3.160.0080.03312.49
5.3.150.0050.04312.43
5.3.140.0020.04512.36
5.3.130.0100.04012.47
5.3.120.0050.03912.30
5.3.110.0030.04012.29
5.3.100.0060.02012.18
5.3.90.0050.02012.28
5.3.80.0020.02312.16
5.3.70.0030.02312.22
5.3.60.0020.02612.10
5.3.50.0070.02912.17
5.3.40.0030.02012.16
5.3.30.0110.01412.14
5.3.20.0030.02312.03
5.3.10.0020.01911.85
5.3.00.0000.02511.82
5.2.170.0000.02010.79
5.2.160.0020.01810.79
5.2.150.0050.03510.79
5.2.140.0030.01710.79
5.2.130.0020.01910.79
5.2.120.0010.01710.79
5.2.110.0050.01710.79
5.2.100.0010.01610.79
5.2.90.0050.01510.79
5.2.80.0000.01910.79
5.2.70.0030.01510.79
5.2.60.0030.01510.79
5.2.50.0070.02310.79
5.2.40.0000.02110.79
5.2.30.0020.01810.79
5.2.20.0030.02010.79
5.2.10.0030.01510.79
5.2.00.0020.01810.79
5.1.60.0030.01210.79
5.1.50.0010.01610.79
5.1.40.0020.02510.79
5.1.30.0030.02010.79
5.1.20.0010.02610.79
5.1.10.0030.01310.79
5.1.00.0000.01410.79
5.0.50.0000.01410.79
5.0.40.0040.01110.79
5.0.30.0040.01310.79
5.0.20.0000.01610.79
5.0.10.0030.01510.79
5.0.00.0000.02010.79
4.4.90.0020.00710.79
4.4.80.0030.00810.79
4.4.70.0000.01010.79
4.4.60.0020.01010.79
4.4.50.0000.01210.79
4.4.40.0000.01910.79
4.4.30.0020.01910.79
4.4.20.0050.00710.79
4.4.10.0030.00810.79
4.4.00.0000.01310.79
4.3.110.0000.01910.79
4.3.100.0030.00610.79
4.3.90.0000.01510.79
4.3.80.0020.01810.79
4.3.70.0020.00810.79
4.3.60.0000.02010.79
4.3.50.0050.00710.79
4.3.40.0020.01310.79
4.3.30.0000.01210.79
4.3.20.0030.00710.79
4.3.10.0030.00810.79
4.3.00.0020.01210.79

preferences:
37.47 ms | 401 KiB | 5 Q