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run code in 300+ PHP versions simultaneously
<?php namespace RN\Pitt { class Amt {} } namespace { $obj = new RN\Pitt\Amt; var_dump($obj); $sub = 'Pitt'; $class = 'Amt'; $name = "RN\\$sub\\$class"; var_dump(class_exists($name)); var_dump($name); $obj = new $class(); var_dump($obj); }

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)
8.3.60.0040.01118.31
8.3.50.0100.00721.92
8.3.40.0140.00718.78
8.3.30.0030.01018.96
8.3.20.0000.00720.26
8.3.10.0040.00421.58
8.3.00.0040.00417.68
8.2.180.0130.00318.30
8.2.170.0140.00722.96
8.2.160.0100.00320.24
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00820.89
8.2.110.0050.00522.11
8.2.100.0080.00317.84
8.2.90.0000.00719.23
8.2.80.0060.00317.97
8.2.70.0000.00817.61
8.2.60.0040.00417.80
8.2.50.0030.00518.07
8.2.40.0000.00718.03
8.2.30.0070.00317.93
8.2.20.0000.00817.70
8.2.10.0070.00018.20
8.2.00.0040.00417.78
8.1.280.0100.00725.92
8.1.270.0050.00323.97
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0000.00823.84
8.1.230.0070.00419.09
8.1.220.0090.00017.78
8.1.210.0040.00418.77
8.1.200.0100.00017.22
8.1.190.0000.00917.23
8.1.180.0030.00518.10
8.1.170.0000.00918.52
8.1.160.0030.00521.85
8.1.150.0050.00318.68
8.1.140.0000.00817.28
8.1.130.0030.00317.80
8.1.120.0000.00717.41
8.1.110.0000.00817.21
8.1.100.0000.00717.40
8.1.90.0040.00417.29
8.1.80.0030.00317.39
8.1.70.0000.00717.34
8.1.60.0040.00417.39
8.1.50.0030.00617.54
8.1.40.0040.00417.52
8.1.30.0000.00817.63
8.1.20.0040.00417.64
8.1.10.0040.00417.55
8.1.00.0040.00417.49
8.0.300.0070.00018.77
8.0.290.0040.00416.75
8.0.280.0000.00818.34
8.0.270.0040.00417.15
8.0.260.0000.00617.30
8.0.250.0030.00317.00
8.0.240.0030.00317.02
8.0.230.0070.00017.04
8.0.220.0070.00016.99
8.0.210.0000.00716.92
8.0.200.0070.00316.76
8.0.190.0050.00216.91
8.0.180.0020.00517.02
8.0.170.0070.00016.93
8.0.160.0000.00716.79
8.0.150.0070.00016.91
8.0.140.0070.00016.83
8.0.130.0000.00513.32
8.0.120.0030.00516.91
8.0.110.0080.00016.86
8.0.100.0000.00716.95
8.0.90.0000.00716.81
8.0.80.0150.00016.99
8.0.70.0040.00416.83
8.0.60.0070.00016.97
8.0.50.0000.00716.95
8.0.30.0130.00616.99
8.0.20.0130.01117.40
8.0.10.0000.00816.81
8.0.00.0120.00616.79
7.4.330.0050.00015.01
7.4.320.0040.00416.43
7.4.300.0000.01016.41
7.4.290.0050.00316.54
7.4.280.0050.00516.59
7.4.270.0070.00016.39
7.4.260.0000.00716.56
7.4.250.0040.00416.54
7.4.240.0040.00316.54
7.4.230.0030.00316.58
7.4.220.0030.01416.59
7.4.210.0040.01016.48
7.4.200.0080.00016.47
7.4.160.0080.00816.48
7.4.150.0130.00617.40
7.4.140.0110.00917.86
7.4.130.0120.00616.61
7.4.120.0090.01016.53
7.4.110.0110.00616.57
7.4.100.0110.01116.63
7.4.90.0150.00316.48
7.4.80.0070.01019.39
7.4.70.0060.01616.55
7.4.60.0170.00016.38
7.4.50.0000.00716.34
7.4.40.0090.00916.29
7.4.30.0100.00616.45
7.4.00.0090.00814.95
7.3.330.0000.00713.32
7.3.320.0000.00513.18
7.3.310.0000.00716.17
7.3.300.0000.00716.35
7.3.290.0100.00916.29
7.3.280.0050.01216.38
7.3.270.0040.01317.40
7.3.260.0100.01016.56
7.3.250.0150.00216.46
7.3.240.0130.00316.17
7.3.230.0130.00916.57
7.3.210.0080.00816.64
7.3.200.0160.00419.39
7.3.190.0060.01516.32
7.3.180.0120.00616.36
7.3.170.0030.01316.55
7.3.160.0090.01316.44
7.3.120.0090.00714.75
7.3.110.0090.00914.52
7.3.100.0120.00614.52
7.3.90.0060.00614.89
7.3.80.0060.01014.56
7.3.70.0140.00014.73
7.3.60.0070.01114.42
7.3.50.0120.00314.75
7.3.40.0100.01014.82
7.3.30.0090.00614.79
7.3.20.0030.01016.43
7.3.10.0090.00616.64
7.3.00.0100.00616.77
7.2.330.0210.00316.51
7.2.320.0110.00716.72
7.2.310.0130.00316.77
7.2.300.0040.01216.61
7.2.290.0090.01216.64
7.2.250.0030.01315.14
7.2.240.0070.01414.75
7.2.230.0090.00615.02
7.2.220.0000.01215.19
7.2.210.0030.01514.89
7.2.200.0090.00614.98
7.2.190.0130.00614.90
7.2.180.0100.01014.96
7.2.170.0090.00614.89
7.2.60.0030.01016.84
7.2.00.0030.00719.61
7.1.330.0070.00715.75
7.1.320.0060.00315.83
7.1.310.0030.00915.73
7.1.300.0040.00815.70
7.1.290.0030.01015.69
7.1.280.0120.00315.83
7.1.270.0070.00715.63
7.1.260.0000.01615.93
7.1.200.0030.01015.80
7.1.100.0000.01318.16
7.1.70.0000.00717.23
7.1.60.0100.01419.25
7.1.50.0000.01517.06
7.1.00.0070.06722.35
7.0.200.0000.00716.63
7.0.140.0030.07321.98
7.0.60.0100.06719.82
7.0.50.0030.08317.87
7.0.40.0130.03720.13
7.0.30.0230.04020.23
7.0.20.0270.04320.12
7.0.10.0130.07020.09
7.0.00.0070.08320.33
5.6.280.0030.07321.09
5.6.210.0030.08720.66
5.6.200.0000.04318.27
5.6.190.0100.05720.50
5.6.180.0270.06320.50
5.6.170.0270.07320.48
5.6.160.0070.08320.50
5.6.150.0100.08018.27
5.6.140.0070.07318.28
5.6.130.0030.04718.24
5.6.120.0070.04321.00
5.6.110.0070.08721.03
5.6.100.0130.06720.98
5.6.90.0100.06321.10
5.6.80.0100.07320.43
5.5.350.4300.04320.43
5.5.340.0030.04717.95
5.5.330.0070.06020.19
5.5.320.0300.07320.31
5.5.310.0230.05720.19
5.5.300.0100.07317.98
5.5.290.0170.07717.91
5.5.280.0100.08320.84
5.5.270.0070.03720.67
5.5.260.0070.08320.67
5.5.250.0030.08020.54
5.5.240.0070.07320.23
5.4.450.0200.04319.49
5.4.440.0200.03319.20
5.4.430.0170.07019.54
5.4.420.0200.04319.19
5.4.410.0230.04319.35
5.4.400.0230.04019.07
5.4.390.0270.07019.14
5.4.380.0300.03319.17
5.4.370.0230.04019.09
5.4.360.0270.07018.94
5.4.350.0270.07318.84
5.4.340.0270.07019.15
5.4.320.0300.07019.06
5.4.310.0170.04319.01
5.4.300.0270.04319.15
5.4.290.0230.03319.16
5.4.280.0170.04019.15
5.4.270.0170.05019.06
5.4.260.0270.02719.21
5.4.250.0130.05318.96
5.4.240.0130.03719.19
5.4.230.0100.04019.12
5.4.220.0170.03719.13
5.4.210.0130.03318.84
5.4.200.0100.03719.07
5.4.190.0130.04018.94
5.4.180.0130.04018.86
5.4.170.0200.03319.07
5.4.160.0100.04018.97
5.4.150.0230.05719.21
5.4.140.0100.04716.39
5.4.130.0130.03716.33
5.4.120.0170.03716.41
5.4.110.0170.03316.18
5.4.100.0270.03716.45
5.4.90.0070.04016.54
5.4.80.0130.03716.39
5.4.70.0230.03716.39
5.4.60.0170.03716.35
5.4.50.0130.07316.32
5.4.40.0130.04016.39
5.4.30.0170.03716.23
5.4.20.0230.07016.30
5.4.10.0270.07016.48
5.4.00.0170.07715.84
5.3.290.0200.05714.58
5.3.280.0230.03314.80
5.3.270.0130.03714.52
5.3.260.0130.04014.50
5.3.250.0170.04314.59
5.3.240.0100.04314.51
5.3.230.0200.03014.70
5.3.220.0200.03014.53
5.3.210.0130.04014.47
5.3.200.0170.03314.72
5.3.190.0130.04014.61
5.3.180.0170.03314.71
5.3.170.0070.04014.63
5.3.160.0130.04714.57
5.3.150.0070.04314.80
5.3.140.0170.05014.66
5.3.130.0200.05314.66
5.3.120.0230.07314.44
5.3.110.0370.05314.70
5.3.100.0200.05314.02
5.3.90.0200.06713.92
5.3.80.0130.04713.92
5.3.70.0230.04013.93
5.3.60.0330.05313.89
5.3.50.0230.04013.92
5.3.40.0230.04314.05
5.3.30.0300.06713.83
5.3.20.0270.05713.73
5.3.10.0300.06013.55
5.3.00.0200.07013.73
5.2.170.0130.06012.35
5.2.160.0100.04712.35
5.2.150.0170.06712.35
5.2.140.0270.03712.35
5.2.130.0230.05312.35
5.2.120.0130.04012.35
5.2.110.0100.04712.35
5.2.100.0230.05712.35
5.2.90.0230.04712.35
5.2.80.0170.03312.35
5.2.70.0200.05012.35
5.2.60.0170.05312.35
5.2.50.0200.06012.35
5.2.40.0230.04012.35
5.2.30.0170.06012.35
5.2.20.0170.04312.35
5.2.10.0130.06012.35
5.2.00.0170.04012.35
5.1.60.0130.05312.35
5.1.50.0230.02312.35
5.1.40.0300.02312.35
5.1.30.0200.03712.35
5.1.20.0200.05012.35
5.1.10.0200.03012.35
5.1.00.0200.05012.35
5.0.50.0170.03712.35
5.0.40.0130.02012.35
5.0.30.0100.06012.35
5.0.20.0100.04312.35
5.0.10.0100.02312.35
5.0.00.0070.04012.35
4.4.90.0030.04012.35
4.4.80.0100.03012.35
4.4.70.0100.03712.35
4.4.60.0070.03312.35
4.4.50.0100.02712.35
4.4.40.0100.05312.35
4.4.30.0100.01312.35
4.4.20.0100.01712.35
4.4.10.0130.01712.35
4.4.00.0100.05012.35
4.3.110.0100.02012.35
4.3.100.0070.02012.35
4.3.90.0070.02312.35
4.3.80.0130.02312.35
4.3.70.0100.01712.35
4.3.60.0070.03312.35
4.3.50.0030.03712.35
4.3.40.0100.04312.35
4.3.30.0030.02312.35
4.3.20.0030.03712.35
4.3.10.0030.02712.35
4.3.00.0000.03012.35

preferences:
46.7 ms | 400 KiB | 5 Q