3v4l.org

run code in 300+ PHP versions simultaneously
<?php //Source: https://bugs.php.net/bug.php?id=64896 class bad { private $_private = array(); public function __construct() { $this->_private[] = 'oh noes'; } public function __destruct() { //echo "bad::destructor\n"; global $bar; $bar = $this->_private; } } $foo = new stdclass; $foo->foo = $foo; $foo->bad = new bad; print_r($foo); gc_disable(); for ($i=0; true; $i++) { $deep_clone = unserialize(serialize($foo)); gc_collect_cycles(); var_dump($i); }

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)
8.3.60.0330.04018.30
8.3.50.0240.04921.84
8.3.40.0470.02918.85
8.3.30.0340.04818.75
8.3.20.0120.01218.54
8.3.10.0240.01220.66
8.3.00.0240.01021.65
8.2.180.0240.04118.54
8.2.170.0170.02422.96
8.2.160.0290.01620.57
8.2.150.0350.03124.18
8.2.140.0100.02724.66
8.2.130.0130.02026.16
8.2.120.0230.01319.36
8.2.110.0190.01920.51
8.2.100.0160.01317.72
8.2.90.0160.01017.63
8.2.80.0090.01219.66
8.2.70.0110.01117.80
8.2.60.0100.01417.80
8.2.50.0070.01818.10
8.2.40.0160.01220.50
8.2.30.0070.01719.86
8.2.20.0110.01117.83
8.2.10.0070.01417.72
8.2.00.0120.00917.69
8.1.280.0200.02325.92
8.1.270.0210.01423.99
8.1.260.0320.01126.35
8.1.250.0240.01728.09
8.1.240.0140.01420.76
8.1.230.0250.01918.85
8.1.220.0130.01317.74
8.1.210.0070.01718.77
8.1.200.0030.02317.35
8.1.190.0060.01517.23
8.1.180.0040.01818.10
8.1.170.0070.01318.54
8.1.160.0000.02118.86
8.1.150.0070.01718.60
8.1.140.0140.00717.51
8.1.130.0030.01617.95
8.1.120.0030.01717.44
8.1.110.0030.01817.47
8.1.100.0060.01917.39
8.1.90.0090.01217.38
8.1.80.0070.01817.32
8.1.70.0100.01017.42
8.1.60.0100.01317.60
8.1.50.0000.02217.51
8.1.40.0100.01717.48
8.1.30.0110.01117.55
8.1.20.0030.02417.69
8.1.10.0070.01617.60
8.1.00.0090.01217.59
8.0.300.0110.02119.46
8.0.290.0100.01316.58
8.0.280.0180.00718.42
8.0.270.0090.00917.11
8.0.260.0070.01416.66
8.0.250.0130.01316.86
8.0.240.0000.02716.88
8.0.230.0060.01516.89
8.0.220.0070.01416.84
8.0.210.0070.01416.73
8.0.200.0000.02016.89
8.0.190.0130.01316.95
8.0.180.0090.01216.91
8.0.170.0150.01216.88
8.0.160.0090.01216.84
8.0.150.0030.02416.67
8.0.140.0060.01516.82
8.0.130.0110.01713.33
8.0.120.0060.01516.79
8.0.110.0060.01616.80
8.0.100.0100.01016.81
8.0.90.0090.01216.63
8.0.80.0190.06116.71
8.0.70.0000.02016.68
8.0.60.0070.01416.63
8.0.50.0120.00916.75
8.0.30.0390.09917.05
8.0.20.0450.11017.40
8.0.10.0030.01717.00
8.0.00.0560.07316.62
7.4.330.0000.02014.76
7.4.320.0070.01316.39
7.4.300.0070.01416.35
7.4.290.0070.01416.36
7.4.280.0070.02016.48
7.4.270.0030.01716.45
7.4.260.0060.01516.31
7.4.250.0070.01716.33
7.4.240.0050.02016.36
7.4.230.0100.01616.16
7.4.220.0140.06816.33
7.4.210.0170.06516.42
7.4.200.0030.02016.17
7.4.190.0000.02616.27
7.4.160.0260.08016.43
7.4.150.0290.05717.40
7.4.140.0530.07917.86
7.4.130.0540.05916.51
7.4.120.0280.08516.44
7.4.110.0480.07116.37
7.4.100.0390.07416.47
7.4.90.0470.07316.37
7.4.80.0310.11019.37
7.4.70.0380.09016.49
7.4.60.0130.06116.07
7.4.50.0170.01016.30
7.4.40.0090.01822.27
7.4.30.0200.07916.45
7.4.00.0060.04214.94
7.3.330.0070.01713.37
7.3.320.0100.01013.29
7.3.310.0060.01616.37
7.3.300.0060.01316.14
7.3.290.0190.06516.29
7.3.280.0190.08116.28
7.3.270.0340.11017.40
7.3.260.0510.07918.24
7.3.250.0370.08816.41
7.3.240.0420.08916.54
7.3.230.0240.08816.52
7.3.210.0570.07116.33
7.3.200.0520.08019.39
7.3.190.0160.08816.36
7.3.180.0070.08516.23
7.3.170.0240.07416.32
7.3.160.0260.07816.40
7.3.120.0230.03315.08
7.2.330.0490.07616.67
7.2.320.0390.10416.75
7.2.310.0520.07216.27
7.2.300.0330.09916.69
7.2.290.0250.06216.80
7.2.60.0130.03016.86
7.2.00.0100.02019.26
7.1.200.0200.02315.50
7.1.100.0100.02617.98
7.1.70.0060.03217.01
7.1.60.0140.06119.40
7.1.50.0070.02617.14
7.1.00.0100.06322.23
7.0.200.0160.01316.71
7.0.140.0100.09022.09
7.0.110.0470.12019.88
7.0.100.0570.11719.93
7.0.90.0230.10319.93
7.0.80.0370.08319.97
7.0.70.0100.04719.99
7.0.60.0130.05019.99
7.0.50.0100.11020.45
7.0.40.0130.06020.29
7.0.30.0000.06020.16
7.0.20.0170.05320.17
7.0.10.0070.06020.25
7.0.00.0030.05320.18
5.6.280.0030.07321.14
5.6.260.0070.03320.65
5.6.250.0130.07020.62
5.6.240.0070.06320.67
5.6.230.0170.07020.59
5.6.220.0070.03720.66
5.6.210.0000.04320.64
5.6.200.0000.04720.95
5.6.190.0070.03721.05
5.6.180.0030.04321.14
5.6.170.0030.04021.16
5.6.160.0100.03321.00
5.6.150.0000.03721.17
5.6.140.0000.03721.31
5.6.130.0100.03021.11
5.6.120.0030.03321.14
5.6.110.0000.04020.97
5.6.100.0130.03021.15
5.6.90.0030.04021.27
5.6.80.0000.04020.36
5.6.70.0070.08020.54
5.6.60.0000.04720.54
5.6.50.0100.05720.43
5.6.40.0000.04320.63
5.6.30.0070.05320.67
5.6.20.0130.07720.33
5.6.10.0130.07020.52
5.6.00.0070.05020.35
5.5.380.0130.10020.53
5.5.370.0130.08020.33
5.5.360.0030.06020.43
5.5.350.0070.05720.43
5.5.340.0070.05021.04
5.5.330.0330.08020.80
5.5.320.0070.06720.83
5.5.310.0100.10020.86
5.5.300.0000.06321.06
5.5.290.0000.05721.04
5.5.280.0100.03320.91
5.5.270.0070.03020.89
5.5.260.0000.04020.90
5.5.250.0100.02720.51
5.5.240.0070.05720.35
5.5.230.0170.06720.36
5.5.220.0000.06320.23
5.5.210.0070.07320.21
5.5.200.0030.04020.33
5.5.190.0030.04020.27
5.5.180.0070.08020.18
5.5.160.0030.03720.27
5.5.150.0100.03720.14
5.5.140.0100.05020.16
5.5.130.0000.04020.21
5.5.120.0100.07020.38
5.5.110.0030.04320.11
5.5.100.0070.04320.25
5.5.90.0070.05020.27
5.5.80.0000.07020.19
5.5.70.0100.04020.19
5.5.60.0000.07020.26
5.5.50.0000.04020.21
5.5.40.0100.06720.26
5.5.30.0130.03020.10
5.5.20.0100.06720.24
5.5.10.0000.08320.13
5.5.00.0100.03719.93
5.4.450.0070.03019.36
5.4.440.0030.03319.23
5.4.430.0000.03719.28
5.4.420.0030.03319.53
5.4.410.0000.04319.29
5.4.400.0100.06019.13
5.4.390.0070.04319.21
5.4.380.0030.05719.30
5.4.370.0070.03319.05
5.4.360.0030.04018.90
5.4.350.0070.06718.96
5.4.340.0070.06018.92
5.4.320.0130.06719.05
5.4.310.0070.05318.94
5.4.300.0070.05318.94
5.4.290.0070.06019.21
5.4.280.0030.07018.90
5.4.270.0000.06018.93
5.4.260.0030.03719.05
5.4.250.0030.03718.98
5.4.240.0030.03719.08
5.4.230.0000.07019.11
5.4.220.0130.06319.11
5.4.210.0030.08319.05
5.4.200.0070.06719.20
5.4.190.0130.02718.88
5.4.180.0070.06019.01
5.4.170.0070.07018.93
5.4.160.0070.05319.02
5.4.150.0030.05718.92
5.4.140.0030.03316.20
5.4.130.0070.05316.39
5.4.120.0000.03716.28
5.4.110.0070.05016.49
5.4.100.0100.06716.41
5.4.90.0030.03716.42
5.4.80.0030.07016.42
5.4.70.0070.05016.40
5.4.60.0070.06316.38
5.4.50.0000.04016.48
5.4.40.0000.06716.48
5.4.30.0030.03716.46
5.4.20.0100.07016.23
5.4.10.0030.04716.47
5.4.00.0070.03015.84
5.3.290.0030.03714.82
5.3.280.0070.07714.82
5.3.270.0100.07314.82
5.3.260.0030.07314.82
5.3.250.0070.07314.82
5.3.240.0100.05314.82
5.3.230.0070.06014.82
5.3.220.0130.02714.82
5.3.210.0130.03014.82
5.3.200.0000.04014.82
5.3.190.0070.03314.82
5.3.180.0100.05314.82
5.3.170.0000.03714.82
5.3.160.0100.03014.82
5.3.150.0030.04714.82
5.3.140.0100.03014.82
5.3.130.0030.03714.82
5.3.120.0000.04314.82
5.3.110.0070.08714.82
5.3.100.0070.03014.82
5.3.90.0000.06714.82
5.3.80.0030.04714.82
5.3.70.0030.07314.82
5.3.60.0130.06314.82
5.3.50.0070.06014.82
5.3.40.0000.04314.82
5.3.30.0000.03714.82
5.3.20.0130.04719.74
5.3.10.0130.06322.81
5.3.00.0130.07023.03

preferences:
59.51 ms | 401 KiB | 5 Q