3v4l.org

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)
8.3.60.0070.01018.55
8.3.50.0130.00421.92
8.3.40.0070.01118.89
8.3.30.0100.00319.10
8.3.20.0000.00720.26
8.3.10.0070.00021.78
8.3.00.0080.00017.90
8.2.180.0160.00018.17
8.2.170.0100.00722.96
8.2.160.0070.00720.52
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0030.00626.16
8.2.120.0060.00321.09
8.2.110.0030.00721.12
8.2.100.0070.00417.91
8.2.90.0080.00018.03
8.2.80.0000.00818.16
8.2.70.0080.00017.50
8.2.60.0040.00417.75
8.2.50.0050.00317.63
8.2.40.0040.00418.28
8.2.30.0040.00718.16
8.2.20.0060.00317.66
8.2.10.0040.00418.17
8.2.00.0040.00417.71
8.1.280.0040.01125.92
8.1.270.0050.00223.99
8.1.260.0040.00426.35
8.1.250.0060.00328.09
8.1.240.0050.00522.34
8.1.230.0030.00920.94
8.1.220.0040.00417.79
8.1.210.0050.00318.89
8.1.200.0060.00317.22
8.1.190.0060.00317.10
8.1.180.0000.00818.10
8.1.170.0050.00318.49
8.1.160.0000.00721.82
8.1.150.0040.00418.76
8.1.140.0040.00417.34
8.1.130.0040.00417.69
8.1.120.0040.00417.40
8.1.110.0030.00517.27
8.1.100.0080.00017.46
8.1.90.0070.00017.43
8.1.80.0040.00317.38
8.1.70.0030.00317.38
8.1.60.0000.00817.41
8.1.50.0000.00817.51
8.1.40.0040.00417.41
8.1.30.0050.00317.59
8.1.20.0040.00417.68
8.1.10.0040.00417.57
8.1.00.0000.00717.53
8.0.300.0000.00720.04
8.0.290.0000.00716.75
8.0.280.0030.00318.44
8.0.270.0000.00717.26
8.0.260.0030.00317.16
8.0.250.0080.00016.96
8.0.240.0040.00416.89
8.0.230.0030.00516.93
8.0.220.0030.00316.90
8.0.210.0050.00316.99
8.0.200.0000.00816.97
8.0.190.0050.00316.91
8.0.180.0020.00516.98
8.0.170.0000.00817.00
8.0.160.0040.00316.91
8.0.150.0030.00316.93
8.0.140.0040.00416.80
8.0.130.0050.00013.33
8.0.120.0070.00316.82
8.0.110.0050.00216.84
8.0.100.0000.00816.75
8.0.90.0070.00016.96
8.0.80.0100.00516.90
8.0.70.0000.00716.95
8.0.60.0080.00016.97
8.0.50.0000.00716.81
8.0.30.0140.00817.03
8.0.20.0120.01217.40
8.0.10.0040.00417.05
8.0.00.0130.00516.69
7.4.330.0050.00015.00
7.4.320.0030.00316.44
7.4.300.0060.00316.61
7.4.290.0020.00516.57
7.4.280.0030.00416.59
7.4.270.0040.00416.50
7.4.260.0030.00616.51
7.4.250.0070.00316.54
7.4.240.0040.00416.48
7.4.230.0000.00716.61
7.4.220.0060.01316.48
7.4.210.0090.01116.50
7.4.200.0030.00616.68
7.4.160.0040.01216.48
7.4.150.0070.01117.40
7.4.140.0160.00817.86
7.4.130.0140.00816.56
7.4.120.0100.00716.42
7.4.110.0080.00816.67
7.4.100.0130.00616.34
7.4.90.0090.00916.49
7.4.80.0100.01119.39
7.4.70.0100.01316.59
7.4.60.0070.01416.62
7.4.50.0030.00316.67
7.4.40.0000.01716.32
7.4.30.0160.00016.64
7.4.00.0060.01115.10
7.3.330.0060.00313.21
7.3.320.0030.00313.22
7.3.310.0040.00416.37
7.3.300.0030.00316.34
7.3.290.0070.01116.32
7.3.280.0040.01316.40
7.3.270.0150.00417.40
7.3.260.0130.01316.39
7.3.240.0080.00816.48
7.3.230.0190.02216.41
7.3.210.0130.00316.54
7.3.200.0060.01019.39
7.3.190.0020.00216.50
7.3.180.0140.00316.37
7.3.170.0060.01316.54
7.3.160.0120.00316.38
7.3.120.0070.00814.90
7.3.110.0100.00914.94
7.3.100.0060.01014.83
7.3.90.0090.00514.84
7.3.80.0070.00714.85
7.3.70.0090.00714.80
7.3.60.0090.00514.85
7.3.50.0060.00914.85
7.3.40.0040.00814.73
7.3.30.0060.01014.71
7.3.20.0070.00716.54
7.3.10.0070.00816.49
7.3.00.0030.01016.65
7.2.330.0130.00616.47
7.2.320.0130.00716.79
7.2.310.0070.01016.66
7.2.300.0070.01116.64
7.2.290.0130.00316.63
7.2.250.0100.01015.01
7.2.240.0080.01215.19
7.2.230.0050.01214.97
7.2.220.0030.00814.98
7.2.210.0060.00815.04
7.2.200.0060.00715.02
7.2.190.0070.00515.04
7.2.180.0020.01214.97
7.2.170.0050.00814.89
7.2.60.0170.00316.68
7.1.330.0060.00815.72
7.1.320.0050.00515.84
7.1.310.0050.01015.68
7.1.300.0090.00515.90
7.1.290.0050.00615.87
7.1.280.0040.00715.75
7.1.270.0060.00615.72
7.1.260.0050.00915.80
7.1.200.0120.00315.79
7.1.100.0070.00418.02
7.1.70.0030.00717.05
7.1.60.0030.02119.25
7.1.50.0100.01017.11
7.1.00.0070.07322.43
7.0.200.0000.00816.77
7.0.140.0000.07722.09
7.0.60.0070.03719.86
7.0.50.0030.04017.95
7.0.40.0030.04320.04
7.0.30.0330.04720.09
7.0.20.0330.06020.30
7.0.10.0130.08020.26
7.0.00.0130.06720.06
5.6.280.0070.07020.91
5.6.210.0070.07720.56
5.6.200.0070.08718.29
5.6.190.0070.08320.41
5.6.180.0230.04720.48
5.6.170.0270.07720.47
5.6.160.0130.08020.44
5.6.150.0030.05018.18
5.6.140.0100.07718.18
5.6.130.0070.08018.19
5.6.120.0070.08320.98
5.6.110.0170.07321.00
5.6.100.0070.08021.03
5.6.90.0070.03721.00
5.6.80.0030.09320.38
5.5.350.4330.04720.41
5.5.340.0030.08017.96
5.5.330.0070.06720.44
5.5.320.0100.04720.47
5.5.310.0170.04720.30
5.5.300.0030.05317.98
5.5.290.0130.07318.04
5.5.280.0000.05320.73
5.5.270.0130.04020.74
5.5.260.0070.06320.97
5.5.250.0070.07720.77
5.5.240.0070.07720.14
5.4.450.0370.04719.17
5.4.440.0130.05019.32
5.4.430.0370.03719.16
5.4.420.0470.03719.64
5.4.410.0170.04319.45
5.4.400.0430.03319.07
5.4.390.0370.04319.00
5.4.380.0930.06018.77
5.4.370.1400.05018.63
5.4.360.0570.05318.71
5.4.350.0600.07018.73
5.4.340.0800.05018.61
5.4.320.0080.04012.50
5.4.310.0030.04012.49
5.4.300.0060.03612.50
5.4.290.0050.03912.50
5.4.280.0050.04212.39
5.4.270.0060.04112.39
5.4.260.0070.03612.39
5.4.250.0080.03512.39
5.4.240.0030.03812.39
5.4.230.0030.04212.39
5.4.220.0050.03612.38
5.4.210.0070.04112.38
5.4.200.0060.03812.38
5.4.190.0070.03512.38
5.4.180.0080.03312.38
5.4.170.0020.04012.39
5.4.160.0060.03712.39
5.4.150.0030.03912.38
5.4.140.0070.03612.07
5.4.130.0050.03912.05
5.4.120.0090.03312.01
5.4.110.0060.03912.00
5.4.100.0060.04012.01
5.4.90.0030.03812.01
5.4.80.0050.04212.00
5.4.70.0090.03712.00
5.4.60.0060.03412.00
5.4.50.0050.04512.01
5.4.40.0060.04611.99
5.4.30.0050.03711.99
5.4.20.0050.03611.99
5.4.10.0060.04211.99
5.4.00.0080.04711.48
5.3.290.0060.03912.80
5.3.280.0070.04712.71
5.3.270.0050.04612.73
5.3.260.0050.03912.72
5.3.250.0100.03312.72
5.3.240.0070.05012.72
5.3.230.0040.04812.71
5.3.220.0120.04812.68
5.3.210.0030.04112.68
5.3.200.0050.03812.68
5.3.190.0040.03912.68
5.3.180.0030.03912.68
5.3.170.0060.04312.67
5.3.160.0050.03712.67
5.3.150.0070.03712.68
5.3.140.0120.03012.66
5.3.130.0070.03712.66
5.3.120.0040.04212.66
5.3.110.0060.03812.66
5.3.100.0060.03612.12
5.3.90.0040.04212.10
5.3.80.0100.03212.09
5.3.70.0030.03912.09
5.3.60.0060.03612.07
5.3.50.0060.03512.02
5.3.40.0040.03712.02
5.3.30.0070.03411.98
5.3.20.0050.03611.76
5.3.10.0030.04311.72
5.3.00.0070.03511.71
5.2.170.0080.0309.18
5.2.160.0060.0289.18
5.2.150.0030.0329.18
5.2.140.0040.0319.18
5.2.130.0040.0329.14
5.2.120.0050.0329.14
5.2.110.0060.0309.14
5.2.100.0080.0249.14
5.2.90.0050.0289.14
5.2.80.0030.0329.14
5.2.70.0060.0289.14
5.2.60.0050.0329.09
5.2.50.0030.0339.06
5.2.40.0040.0359.04
5.2.30.0060.0389.01
5.2.20.0020.0329.00
5.2.10.0050.0378.92
5.2.00.0040.0328.79
5.1.60.0060.0228.06
5.1.50.0050.0298.07
5.1.40.0040.0318.04
5.1.30.0040.0358.40
5.1.20.0040.0278.42
5.1.10.0010.0288.14
5.1.00.0050.0268.14
5.0.50.0040.0216.62
5.0.40.0080.0226.48
5.0.30.0020.0326.29
5.0.20.0010.0216.27
5.0.10.0020.0206.24
5.0.00.0040.0306.23
4.4.90.0050.0134.77
4.4.80.0020.0164.75
4.4.70.0030.0164.75
4.4.60.0020.0234.75
4.4.50.0000.0184.77
4.4.40.0030.0314.71
4.4.30.0000.0194.76
4.4.20.0040.0214.84
4.4.10.0020.0164.85
4.4.00.0020.0334.75
4.3.110.0030.0204.67
4.3.100.0000.0174.66
4.3.90.0040.0134.64
4.3.80.0010.0254.58
4.3.70.0060.0114.63
4.3.60.0010.0184.63
4.3.50.0000.0184.63
4.3.40.0020.0244.53
4.3.30.0020.0163.28
4.3.20.0030.0193.26
4.3.10.0020.0153.22
4.3.00.0000.02015.27

preferences:
49.89 ms | 400 KiB | 5 Q