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run code in 300+ PHP versions simultaneously
<?php var_dump(class_exists("TestClass")); //false class TestClass implements JsonSerializable { function __construct() { var_dump(__METHOD__); } public function jsonSerialize() { return null; } } var_dump(class_exists("TestClass")); //true

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)
8.3.60.0190.00316.75
8.3.50.0080.01318.40
8.3.40.0030.01718.53
8.3.30.0150.00618.56
8.3.20.0050.00318.52
8.3.10.0030.00520.47
8.3.00.0030.00517.50
8.2.180.0180.00316.50
8.2.170.0040.01122.96
8.2.160.0100.00322.12
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0000.00726.16
8.2.120.0070.00019.70
8.2.110.0070.00320.88
8.2.100.0090.00317.78
8.2.90.0090.00019.17
8.2.80.0030.00617.93
8.2.70.0080.00017.38
8.2.60.0040.00417.91
8.2.50.0050.00318.07
8.2.40.0040.00418.22
8.2.30.0040.00417.99
8.2.20.0020.00517.59
8.2.10.0040.00417.51
8.2.00.0040.00417.63
8.1.280.0000.01525.92
8.1.270.0070.00023.99
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0030.00620.61
8.1.230.0110.00020.96
8.1.220.0030.00617.74
8.1.210.0080.00018.88
8.1.200.0060.00317.23
8.1.190.0040.00417.18
8.1.180.0050.00318.10
8.1.170.0050.00318.75
8.1.160.0040.00418.73
8.1.150.0000.00718.46
8.1.140.0070.00017.25
8.1.130.0040.00417.68
8.1.120.0030.00317.29
8.1.110.0040.00417.41
8.1.100.0000.00817.39
8.1.90.0050.00317.42
8.1.80.0040.00417.40
8.1.70.0000.00717.38
8.1.60.0030.00617.49
8.1.50.0060.00317.38
8.1.40.0040.00417.50
8.1.30.0040.00417.46
8.1.20.0000.00817.46
8.1.10.0000.00817.29
8.1.00.0000.00717.32
8.0.300.0070.00019.80
8.0.290.0000.00716.75
8.0.280.0000.00718.24
8.0.270.0000.00717.09
8.0.260.0070.00016.66
8.0.250.0070.00016.85
8.0.240.0000.00916.75
8.0.230.0040.00416.85
8.0.220.0070.00016.84
8.0.210.0030.00516.91
8.0.200.0000.00816.87
8.0.190.0030.00516.86
8.0.180.0040.00416.82
8.0.170.0000.00816.80
8.0.160.0000.00816.75
8.0.150.0040.00416.75
8.0.140.0000.01116.68
8.0.130.0050.00013.23
8.0.120.0000.00716.66
8.0.110.0040.00416.67
8.0.100.0000.00716.77
8.0.90.0000.00816.77
8.0.80.0000.01516.70
8.0.70.0040.00416.69
8.0.60.0050.00316.62
8.0.50.0000.00816.68
8.0.30.0090.00916.89
8.0.20.0160.00817.00
8.0.10.0000.00716.78
8.0.00.0110.00916.75
7.4.330.0050.00012.95
7.4.320.0030.00316.52
7.4.300.0060.00016.53
7.4.290.0080.00016.43
7.4.280.0040.00416.52
7.4.270.0030.00316.41
7.4.260.0000.00513.26
7.4.250.0000.00816.52
7.4.240.0000.00716.45
7.4.230.0030.00316.39
7.4.220.0160.00916.46
7.4.210.0100.00816.46
7.4.200.0030.00316.36
7.4.190.0030.00316.39
7.4.160.0090.00616.27
7.4.150.0090.00916.30
7.4.140.0100.01016.31
7.4.130.0070.01116.54
7.4.120.0030.01616.37
7.4.110.0030.01316.30
7.4.100.0120.00416.56
7.4.90.0000.01716.54
7.4.80.0090.00916.50
7.4.70.0100.00716.34
7.4.60.0110.00616.48
7.4.50.0030.00616.28
7.4.40.0000.01516.40
7.4.30.0090.00816.65
7.4.00.0080.00414.77
7.3.330.0000.00612.96
7.3.320.0030.00313.00
7.3.310.0040.00416.21
7.3.300.0000.00716.22
7.3.290.0030.01216.16
7.3.280.0090.00816.20
7.3.270.0100.00716.27
7.3.260.0060.01216.43
7.3.250.0060.01216.22
7.3.240.0090.00616.10
7.3.230.0170.00016.32
7.3.210.0150.00916.31
7.3.200.0200.00619.39
7.3.190.0040.00516.41
7.3.180.0130.00316.16
7.3.170.0100.00616.53
7.3.160.0140.00416.53
7.3.120.0030.01314.87
7.3.10.0080.00816.41
7.3.00.0120.00016.31
7.2.330.0000.01716.24
7.2.320.0130.00916.35
7.2.310.0090.01216.67
7.2.300.0030.01416.56
7.2.290.0130.00316.48
7.2.130.0060.00616.84
7.2.120.0030.01416.80
7.2.110.0050.00916.77
7.2.100.0040.01316.86
7.2.90.0050.00516.40
7.2.80.0090.00316.57
7.2.70.0030.01016.71
7.2.60.0100.00016.78
7.2.50.0080.00416.59
7.2.40.0070.00416.80
7.2.30.0040.01116.36
7.2.20.0000.01516.91
7.2.10.0130.00316.48
7.2.00.0030.01017.98
7.1.250.0140.00315.57
7.1.100.0030.00917.80
7.1.70.0030.00617.16
7.1.60.0060.01619.40
7.1.50.0040.01516.80
7.1.00.0070.07322.29
7.0.200.0290.00314.71
7.0.140.0030.07021.96
7.0.120.0000.07022.02
7.0.60.0070.06319.96
7.0.50.0100.03717.85
7.0.40.0030.04017.71
7.0.30.0030.04017.72
7.0.20.0030.04717.84
7.0.10.0070.03717.84
7.0.00.0070.03717.71
5.6.280.0000.07721.08
5.6.210.0030.06020.47
5.6.200.0030.04018.29
5.6.190.0030.04018.13
5.6.180.0030.04018.21
5.6.170.0070.03718.12
5.6.160.0030.04018.15
5.6.150.0030.04318.29
5.6.140.0100.05018.17
5.6.130.0070.05318.15
5.6.120.0000.09718.21
5.6.110.0070.04318.27
5.6.100.0170.07318.17
5.6.90.0070.06318.16
5.6.80.0170.06717.54
5.6.70.0030.07317.59
5.6.60.0100.07717.53
5.6.50.0070.06317.54
5.6.40.0070.05017.57
5.6.30.0170.07017.63
5.6.20.0070.08317.60
5.6.10.0130.03717.53
5.6.00.0130.07317.46
5.5.350.0270.07720.50
5.5.340.0000.04017.96
5.5.330.0030.04318.11
5.5.320.0070.03717.96
5.5.310.0100.03318.04
5.5.300.0070.07017.98
5.5.290.0070.05717.97
5.5.280.0070.08017.95
5.5.270.0100.03717.98
5.5.260.0030.08717.97
5.5.250.0070.07717.78
5.5.240.0000.08317.43
5.5.230.0030.08317.46
5.5.220.0000.05317.36
5.5.210.0130.06717.32
5.5.200.0030.08717.39
5.5.190.0070.08017.44
5.5.180.0070.07717.31
5.5.160.0130.07017.33
5.5.150.0000.05717.30
5.5.140.0030.08017.27
5.5.130.0100.06717.32
5.5.120.0030.05017.43
5.5.110.0030.06017.41
5.5.100.0030.05317.20
5.5.90.0030.08017.22
5.5.80.0100.07717.26
5.5.70.0100.04017.27
5.5.60.0230.05717.23
5.5.50.0030.07717.18
5.5.40.0030.06317.32
5.5.30.0130.06017.30
5.5.20.0030.08017.30
5.5.10.0070.08317.23
5.5.00.0030.08017.21
5.4.450.0070.05319.37
5.4.440.0070.05019.34
5.4.430.0130.07019.42
5.4.420.0070.08719.43
5.4.410.0100.03319.18
5.4.400.0100.06019.10
5.4.390.0100.05719.01
5.4.380.0070.08019.32
5.4.370.0100.06018.89
5.4.360.0070.06019.03
5.4.350.0130.05019.12
5.4.340.0070.06019.14
5.4.320.0070.06719.14
5.4.310.0070.07719.03
5.4.300.0030.08019.09
5.4.290.0130.06019.04
5.4.280.0030.06719.27
5.4.270.0170.06318.88
5.4.260.0030.04319.00
5.4.250.0070.05018.99
5.4.240.0030.07019.03
5.4.230.0170.06319.09
5.4.220.0070.08019.04
5.4.210.0100.07319.08
5.4.200.0030.08319.00
5.4.190.0130.07019.03
5.4.180.0070.07719.26
5.4.170.0030.08019.02
5.4.160.0000.05018.96
5.4.150.0070.05319.25
5.4.140.0070.07716.29
5.4.130.0030.07016.54
5.4.120.0100.07016.39
5.4.110.0070.07716.42
5.4.100.0030.03716.40
5.4.90.0070.03716.34
5.4.80.0030.07316.21
5.4.70.0070.05316.47
5.4.60.0000.05016.35
5.4.50.0070.03716.22
5.4.40.0000.04016.31
5.4.30.0070.07316.31
5.4.20.0100.05016.30
5.4.10.0030.06716.55
5.4.00.0100.06316.01
5.3.290.0130.07314.73
5.3.280.0030.08014.64
5.3.270.0000.05014.58
5.3.260.0100.06714.46
5.3.250.0130.07314.46
5.3.240.0070.07714.62
5.3.230.0070.05014.66
5.3.220.0070.07314.62
5.3.210.0030.08314.53
5.3.200.0100.06014.69
5.3.190.0030.04314.62
5.3.180.0070.05314.53
5.3.170.0100.06314.41
5.3.160.0070.03714.61
5.3.150.0070.03714.66
5.3.140.0030.06314.57
5.3.130.0100.07314.77
5.3.120.0100.07014.58
5.3.110.0230.05314.61
5.3.100.0000.06013.99
5.3.90.0030.04014.23
5.3.80.0030.03714.00
5.3.70.0030.03713.90
5.3.60.0100.07313.88
5.3.50.0100.07013.95
5.3.40.0130.06713.90
5.3.30.0070.05313.95
5.3.20.0100.03713.70
5.3.10.0030.07313.73
5.3.00.0030.07713.69
5.2.170.0070.05311.16
5.2.160.0130.05711.15
5.2.150.0100.05011.03
5.2.140.0070.05711.15
5.2.130.0100.05711.07
5.2.120.0100.05711.14
5.2.110.0000.06711.14
5.2.100.0000.03711.14
5.2.90.0030.02711.15
5.2.80.0000.06311.14
5.2.70.0000.06311.16
5.2.60.0030.06011.10
5.2.50.0000.04711.23
5.2.40.0100.04711.04
5.2.30.0130.05311.02
5.2.20.0070.06011.05
5.2.10.0070.04310.88
5.2.00.0070.04310.82
5.1.60.0100.05010.07
5.1.50.0030.05310.07
5.1.40.0000.0379.98
5.1.30.0000.04710.43
5.1.20.0070.05010.36
5.1.10.0000.04010.10
5.1.00.0000.03710.04
5.0.50.0100.0138.47
5.0.40.0000.0238.36
5.0.30.0000.0538.06
5.0.20.0030.0408.25
5.0.10.0030.0408.38
5.0.00.0070.0638.20
4.4.90.0030.0378.04
4.4.80.0100.0308.04
4.4.70.0030.0378.04
4.4.60.0000.0338.04
4.4.50.0030.0308.04
4.4.40.0030.0578.04
4.4.30.0000.0378.04
4.4.20.0000.0278.04
4.4.10.0000.0208.04
4.4.00.0030.0238.04
4.3.110.0070.0308.04
4.3.100.0000.0378.04
4.3.90.0000.0308.04
4.3.80.0000.0538.04
4.3.70.0070.0308.04
4.3.60.0030.0378.04
4.3.50.0030.0278.04
4.3.40.0100.0478.04
4.3.30.0030.0378.04
4.3.20.0000.0338.04
4.3.10.0000.0308.04
4.3.00.0070.0308.04

preferences:
41.38 ms | 401 KiB | 5 Q