3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Widget //implements Serializable { public $references = array(); public function serialize() { $vars = get_object_vars($this); $serialized = serialize($vars); return $serialized; } public function unserialize($serialized) { $array = unserialize($serialized); foreach($array as $k => $v) $this->$k = $v; } } class Placeholder { public $id; public function __construct($id) { $this->id = $id; } } $placeholder1 = new Placeholder(1); $placeholder2 = new Placeholder(2); $widgets = array(new Widget, new Widget, new Widget, new Widget); $widgets[0]->references[] = $placeholder1; $widgets[1]->references[] = $placeholder2; $widgets[2]->references[] = $placeholder1; $widgets[3]->references[] = $placeholder1; var_dump(unserialize(serialize($widgets)));

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)
8.3.60.0000.01416.63
8.3.50.0070.00821.95
8.3.40.0120.00318.68
8.3.30.0110.00719.13
8.3.20.0040.00420.38
8.3.10.0080.00023.36
8.3.00.0080.00020.95
8.2.180.0120.00318.29
8.2.170.0000.01522.96
8.2.160.0100.00320.22
8.2.150.0000.00824.18
8.2.140.0050.00324.66
8.2.130.0100.00326.16
8.2.120.0030.00622.25
8.2.110.0040.00422.25
8.2.100.0080.00417.91
8.2.90.0030.00619.05
8.2.80.0000.00918.03
8.2.70.0050.00317.75
8.2.60.0100.00017.93
8.2.50.0040.00418.07
8.2.40.0040.00418.16
8.2.30.0080.00018.25
8.2.20.0080.00017.67
8.2.10.0040.00417.82
8.2.00.0040.00417.79
8.1.280.0070.00725.92
8.1.270.0060.00322.14
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00323.80
8.1.230.0070.00319.23
8.1.220.0080.00017.74
8.1.210.0080.00018.77
8.1.200.0000.00917.23
8.1.190.0050.00317.41
8.1.180.0060.00318.10
8.1.170.0050.00318.65
8.1.160.0000.00822.04
8.1.150.0000.00718.56
8.1.140.0000.00817.46
8.1.130.0000.00717.89
8.1.120.0000.00717.46
8.1.110.0080.00017.50
8.1.100.0040.00417.33
8.1.90.0040.00417.37
8.1.80.0000.00717.46
8.1.70.0040.00417.33
8.1.60.0060.00317.63
8.1.50.0000.00717.57
8.1.40.0000.00817.54
8.1.30.0080.00017.48
8.1.20.0050.00317.68
8.1.10.0000.00817.59
8.1.00.0070.00417.52
8.0.300.0080.00018.77
8.0.290.0040.00417.15
8.0.280.0030.00318.45
8.0.270.0030.00317.33
8.0.260.0000.00616.77
8.0.250.0070.00017.06
8.0.240.0000.00717.04
8.0.230.0040.00416.96
8.0.220.0040.00417.00
8.0.210.0000.00816.96
8.0.200.0070.00017.06
8.0.190.0000.00717.05
8.0.180.0000.00716.98
8.0.170.0040.00417.04
8.0.160.0070.00016.87
8.0.150.0000.00716.96
8.0.140.0000.00816.96
8.0.130.0030.00313.48
8.0.120.0000.00716.79
8.0.110.0020.00516.97
8.0.100.0030.00616.79
8.0.90.0000.00717.03
8.0.80.0120.00317.00
8.0.70.0000.00717.06
8.0.60.0030.00616.96
8.0.50.0090.00016.84
8.0.30.0090.01017.02
8.0.20.0110.00817.40
8.0.10.0000.00717.03
8.0.00.0120.01016.76
7.4.330.0030.00315.06
7.4.320.0000.00616.54
7.4.300.0000.00616.66
7.4.290.0030.00316.53
7.4.280.0000.00716.50
7.4.270.0000.00716.57
7.4.260.0030.00616.50
7.4.250.0070.00016.57
7.4.240.0040.00316.57
7.4.230.0000.00716.45
7.4.220.0110.00816.58
7.4.210.0070.00916.54
7.4.200.0030.00316.66
7.4.190.0030.00616.68
7.4.160.0030.02016.55
7.4.150.0200.00617.40
7.4.140.0100.00817.86
7.4.130.0130.00616.59
7.4.120.0080.01016.51
7.4.110.0080.01016.55
7.4.100.0100.01016.46
7.4.90.0110.00616.63
7.4.80.0170.00719.39
7.4.70.0140.00716.70
7.4.60.0150.00316.70
7.4.50.0090.00016.70
7.4.40.0110.00722.77
7.4.30.0110.00616.58
7.4.00.0070.00715.13
7.3.330.0000.00613.32
7.3.320.0000.00513.33
7.3.310.0040.00316.36
7.3.300.0060.00016.39
7.3.290.0130.00316.27
7.3.280.0090.00916.34
7.3.270.0100.00717.40
7.3.260.0110.00816.62
7.3.250.0100.00816.38
7.3.240.0130.00516.54
7.3.230.0060.01016.41
7.3.210.0070.01116.57
7.3.200.0070.01519.39
7.3.190.0130.00416.64
7.3.180.0030.01316.65
7.3.170.0100.00616.45
7.3.160.0100.00616.24
7.3.120.0070.01014.96
7.2.330.0070.01116.75
7.2.320.0070.01716.36
7.2.310.0060.01316.34
7.2.300.0100.01316.86
7.2.290.0180.00016.80
7.2.00.0080.00419.14
7.1.100.0030.01018.36
7.1.70.0080.00016.89
7.1.60.0130.01019.29
7.1.50.0090.01316.96
7.1.00.0070.07322.28
7.0.200.0070.00016.88
7.0.140.0030.07021.92
7.0.80.0400.06020.05
7.0.70.0530.05319.98
7.0.60.0530.08020.02
7.0.50.0200.07720.26
7.0.40.0130.08020.07
7.0.30.0030.04320.13
7.0.20.0170.07020.13
7.0.10.0200.06020.14
7.0.00.0030.05320.07
5.6.280.0030.07321.10
5.6.230.0100.04720.64
5.6.220.0170.07020.62
5.6.210.0170.07320.69
5.6.200.0030.09021.07
5.6.190.0070.08021.02
5.6.180.0170.04320.97
5.6.170.0000.05721.02
5.6.160.0130.07321.11
5.6.150.0070.09021.09
5.6.140.0030.04320.96
5.6.130.0130.08721.02
5.6.120.0070.08721.05
5.6.110.0070.08721.13
5.6.100.0100.07321.16
5.6.90.0030.08321.05
5.6.80.0130.06720.52
5.6.70.0130.08020.48
5.6.60.0100.08020.38
5.6.50.0000.05320.48
5.6.40.0030.04720.39
5.6.30.0100.08020.41
5.6.20.0130.06720.38
5.6.10.0070.08320.42
5.6.00.0130.05320.30
5.5.370.0100.07720.36
5.5.360.0070.08320.50
5.5.350.0170.06720.49
5.5.340.0100.03720.93
5.5.330.0030.04720.92
5.5.320.0200.07320.80
5.5.310.0200.05320.65
5.5.300.0070.05020.80
5.5.290.0100.06720.84
5.5.280.0070.04720.73
5.5.270.0100.08020.93
5.5.260.0130.06020.88
5.5.250.0070.07020.75
5.5.240.0030.08020.32
5.5.230.0130.07320.27
5.5.220.0100.07720.26
5.5.210.0030.08020.03
5.5.200.0070.07720.25
5.5.190.0070.08320.19
5.5.180.0030.05320.13
5.5.160.0000.05320.29
5.5.150.0030.08020.27
5.5.140.0070.08020.16
5.5.130.0130.07320.16
5.5.120.0070.07020.13
5.5.110.0170.06720.17
5.5.100.0070.06020.08
5.5.90.0100.07320.07
5.5.80.0100.07320.13
5.5.70.0030.04020.13
5.5.60.0130.07720.15
5.5.50.0070.07720.16
5.5.40.0130.07720.06
5.5.30.0100.04320.09
5.5.20.0100.08020.05
5.5.10.0100.06020.04
5.5.00.0100.06320.11
5.4.450.0030.08019.54
5.4.440.0100.07019.48
5.4.430.0030.08019.22
5.4.420.0130.03719.48
5.4.410.0170.06019.35
5.4.400.0130.06319.14
5.4.390.0030.08318.85
5.4.380.0170.06719.03
5.4.370.0070.06019.21
5.4.360.0130.07319.13
5.4.350.0030.04319.25
5.4.340.0100.07719.04
5.4.320.0130.06719.16
5.4.310.0070.07719.03
5.4.300.0030.07719.12
5.4.290.0100.08019.02
5.4.280.0030.08318.90
5.4.270.0070.07719.12
5.4.260.0070.08019.11
5.4.250.0070.07719.02
5.4.240.0170.03019.04
5.4.230.0100.07318.87
5.4.220.0070.07318.86
5.4.210.0100.07319.22
5.4.200.0100.04018.87
5.4.190.0130.07319.12
5.4.180.0100.06718.84
5.4.170.0070.03719.04
5.4.160.0000.04019.13
5.4.150.0030.04019.19
5.4.140.0070.04016.51
5.4.130.0100.03016.30
5.4.120.0070.03716.45
5.4.110.0100.03016.44
5.4.100.0070.03316.46
5.4.90.0000.04316.45
5.4.80.0000.04016.55
5.4.70.0030.05016.49
5.4.60.0030.04316.31
5.4.50.0000.04016.42
5.4.40.0000.03316.36
5.4.30.0070.05316.48
5.4.20.0100.02316.48
5.4.10.0070.03316.36
5.4.00.0030.07715.78
5.3.290.0070.04714.77
5.3.280.0100.07014.68
5.3.270.0030.04714.61
5.3.260.0070.05014.59
5.3.250.0030.07014.73
5.3.240.0030.03714.65
5.3.230.0030.03714.68
5.3.220.0000.04014.69
5.3.210.0100.03714.57
5.3.200.0000.06014.61
5.3.190.0030.03314.71
5.3.180.0030.03314.50
5.3.170.0000.06314.62
5.3.160.0070.03714.62
5.3.150.0030.03314.59
5.3.140.0030.05314.50
5.3.130.0030.03714.70
5.3.120.0000.06714.62
5.3.110.0030.05014.52
5.3.100.0030.03714.02
5.3.90.0000.04014.07
5.3.80.0030.03713.94
5.3.70.0030.03313.96
5.3.60.0030.03713.93
5.3.50.0070.04314.07
5.3.40.0030.03014.07
5.3.30.0000.04013.82
5.3.20.0000.04313.76
5.3.10.0000.03713.70
5.3.00.0130.02713.70
5.2.170.0000.03013.70
5.2.160.0030.02713.70
5.2.150.0100.02013.70
5.2.140.0030.04313.70
5.2.130.0000.03013.70
5.2.120.0000.03013.70
5.2.110.0070.02713.70
5.2.100.0030.02713.70
5.2.90.0070.02313.70
5.2.80.0030.03713.70
5.2.70.0000.03013.70
5.2.60.0000.03013.70
5.2.50.0030.02313.70
5.2.40.0070.02713.70
5.2.30.0030.04313.70
5.2.20.0000.03713.70
5.2.10.0000.03013.70
5.2.00.0030.02713.70
5.1.60.0000.03013.70
5.1.50.0030.02313.70
5.1.40.0000.02713.70
5.1.30.0000.03313.70
5.1.20.0000.03013.70
5.1.10.0000.02713.70
5.1.00.0030.02713.70
5.0.50.0030.01713.70
5.0.40.0000.02013.70
5.0.30.0000.03313.70
5.0.20.0000.03013.70
5.0.10.0170.03013.70
5.0.00.0000.05313.70
4.4.90.0030.01313.70
4.4.80.0030.01313.70
4.4.70.0000.01713.70
4.4.60.0000.01713.70
4.4.50.0030.01313.70
4.4.40.0000.02713.70
4.4.30.0000.01713.70
4.4.20.0000.01713.70
4.4.10.0030.01313.70
4.4.00.0000.02313.70
4.3.110.0030.01313.70
4.3.100.0000.02313.70
4.3.90.0030.02013.70
4.3.80.0030.03313.70
4.3.70.0100.02313.70
4.3.60.0000.02713.70
4.3.50.0070.03013.70
4.3.40.0030.05013.70
4.3.30.0030.02713.70
4.3.20.0030.03313.70
4.3.10.0000.03713.70
4.3.00.0070.02013.70

preferences:
146.17 ms | 401 KiB | 5 Q