3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = false; $bar = null; var_dump( isset( $foo ) ); var_dump( isset( $bar ) );

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)
8.3.60.0140.00718.30
8.3.50.0150.00321.94
8.3.40.0100.01018.77
8.3.30.0110.00418.79
8.3.20.0040.00420.23
8.3.10.0040.00421.88
8.3.00.0000.00819.05
8.2.180.0060.01316.50
8.2.170.0100.01022.96
8.2.160.0060.00820.14
8.2.150.0040.00424.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00419.54
8.2.110.0000.01119.30
8.2.100.0060.00617.63
8.2.90.0000.00719.21
8.2.80.0000.00817.97
8.2.70.0040.00417.50
8.2.60.0060.00317.93
8.2.50.0090.00018.07
8.2.40.0050.00319.94
8.2.30.0070.00017.90
8.2.20.0060.00317.49
8.2.10.0030.00518.04
8.2.00.0070.00017.61
8.1.280.0110.00325.92
8.1.270.0050.00324.66
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0080.00023.92
8.1.230.0090.00317.42
8.1.220.0060.00317.75
8.1.210.0050.00318.77
8.1.200.0060.00317.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0000.00820.29
8.1.160.0000.00721.99
8.1.150.0000.00718.72
8.1.140.0000.00817.34
8.1.130.0030.00317.86
8.1.120.0040.00417.41
8.1.110.0000.00717.42
8.1.100.0020.00517.38
8.1.90.0000.00717.27
8.1.80.0000.00717.36
8.1.70.0000.00817.40
8.1.60.0040.00417.52
8.1.50.0070.00017.45
8.1.40.0080.00017.41
8.1.30.0030.00517.46
8.1.20.0000.00817.54
8.1.10.0000.00917.35
8.1.00.0040.00417.30
8.0.300.0000.00718.77
8.0.290.0040.00416.63
8.0.280.0000.00718.37
8.0.270.0030.00317.21
8.0.260.0060.00017.18
8.0.250.0070.00016.89
8.0.240.0000.00716.92
8.0.230.0080.00316.90
8.0.220.0030.00316.82
8.0.210.0000.00716.71
8.0.200.0000.00716.83
8.0.190.0000.00716.76
8.0.180.0040.00416.73
8.0.170.0000.00716.83
8.0.160.0040.00416.92
8.0.150.0000.00716.79
8.0.140.0050.00216.70
8.0.130.0020.00513.27
8.0.120.0000.00816.68
8.0.110.0000.00716.71
8.0.100.0000.00716.85
8.0.90.0040.00416.77
8.0.80.0130.00716.83
8.0.70.0030.00516.71
8.0.60.0000.00716.70
8.0.50.0020.00516.76
8.0.30.0110.01316.98
8.0.20.0080.01317.40
8.0.10.0040.00416.80
8.0.00.0070.01016.65
7.4.330.0030.00315.03
7.4.320.0040.00416.57
7.4.300.0000.00616.44
7.4.290.0070.00016.46
7.4.280.0000.00816.45
7.4.270.0060.00016.57
7.4.260.0040.00416.38
7.4.250.0070.00016.38
7.4.240.0020.00516.46
7.4.230.0050.00216.53
7.4.220.0060.01316.47
7.4.210.0130.00316.44
7.4.200.0050.00316.40
7.4.160.0110.00616.30
7.4.150.0090.00917.40
7.4.140.0090.00917.86
7.4.130.0130.00316.47
7.4.120.0080.00816.37
7.4.110.0120.00616.57
7.4.100.0120.00616.68
7.4.90.0030.01316.39
7.4.80.0060.01519.39
7.4.70.0040.01216.33
7.4.60.0100.00716.23
7.4.50.0080.00016.59
7.4.40.0160.00016.53
7.4.30.0120.00616.25
7.4.00.0080.01014.92
7.3.330.0000.00513.04
7.3.320.0100.00512.87
7.3.310.0030.00316.25
7.3.300.0030.00316.04
7.3.290.0090.00716.15
7.3.280.0070.00816.11
7.3.270.0100.00717.40
7.3.260.0150.00316.08
7.3.250.0110.00916.24
7.3.240.0070.01016.45
7.3.230.0100.00716.39
7.3.210.0120.00616.21
7.3.200.0120.00919.39
7.3.190.0120.00816.34
7.3.180.0090.00916.18
7.3.170.0060.01616.31
7.3.160.0080.00816.18
7.3.120.0060.01314.71
7.3.110.0110.00714.76
7.3.100.0090.00914.72
7.3.90.0030.01314.56
7.3.80.0090.00614.64
7.3.70.0090.00614.57
7.3.60.0070.01014.58
7.3.50.0000.00914.41
7.3.40.0090.00314.64
7.3.30.0030.01014.43
7.3.20.0060.00616.57
7.3.10.0060.00616.52
7.3.00.0070.00716.29
7.2.330.0060.01116.23
7.2.320.0000.01616.29
7.2.310.0050.01416.59
7.2.300.0000.01716.14
7.2.290.0030.01316.61
7.2.250.0030.01215.09
7.2.240.0110.01114.95
7.2.230.0090.00614.79
7.2.220.0100.01014.89
7.2.210.0070.01114.72
7.2.200.0000.01614.78
7.2.190.0050.00514.78
7.2.180.0030.01314.78
7.2.170.0080.00414.55
7.2.60.0030.01216.68
7.2.00.0060.00619.50
7.1.330.0060.00615.73
7.1.320.0060.00915.91
7.1.310.0040.01415.52
7.1.300.0040.00715.76
7.1.290.0060.00615.65
7.1.280.0030.01015.38
7.1.270.0080.00315.29
7.1.260.0000.01415.60
7.1.200.0060.00315.74
7.1.100.0040.00417.95
7.1.70.0030.00617.05
7.1.60.0060.01919.50
7.1.50.0070.01316.68
7.1.00.0100.07022.29
7.0.200.0760.00414.79
7.0.140.0070.06721.98
7.0.60.0100.06019.93
7.0.50.0000.04017.86
7.0.40.0130.04319.96
7.0.30.0230.03720.09
7.0.20.0270.08020.00
7.0.10.0200.07020.13
7.0.00.0130.08020.01
5.6.280.0030.07321.09
5.6.210.0100.06320.50
5.6.200.0130.07318.26
5.6.190.0000.05020.44
5.6.180.0130.06720.24
5.6.170.0230.07020.48
5.6.160.0030.05320.52
5.6.150.0070.04018.21
5.6.140.0130.07318.16
5.6.130.0000.05718.12
5.6.120.0030.08721.01
5.6.110.0330.06320.97
5.6.100.0070.04320.99
5.6.90.0070.04321.12
5.6.80.0070.06720.50
5.6.70.0230.06720.36
5.5.350.0300.06020.42
5.5.340.0030.06017.98
5.5.330.0030.04320.56
5.5.320.0230.07320.43
5.5.310.0200.08320.30
5.5.300.0070.08017.98
5.5.290.0100.04717.98
5.5.280.0100.08320.76
5.5.270.0100.08320.77
5.5.260.0170.08020.82
5.5.250.0100.08020.58
5.5.240.0030.04020.15
5.4.450.0570.06719.52
5.4.440.0830.04719.62
5.4.430.0830.06019.43
5.4.420.0130.07019.10
5.4.410.0200.05319.18
5.4.400.0170.06018.60
5.4.390.0500.07018.73
5.4.380.0270.05018.49
5.4.370.0370.07018.69
5.4.360.0370.04318.55
5.4.350.0330.05018.69
5.4.340.0300.06318.57
5.4.320.0300.05318.66
5.4.310.0270.05718.45
5.4.300.0400.04318.57
5.4.290.0170.08018.70
5.4.280.0300.07718.48
5.4.270.0330.07018.70
5.4.260.0370.06318.66
5.4.250.0330.07018.45
5.4.240.0230.06018.76
5.4.230.0200.05718.48
5.4.220.0200.05718.47
5.4.210.0170.06018.65
5.4.200.0270.06716.64
5.4.190.0330.05718.70
5.4.180.0230.05318.69
5.4.170.0230.07018.69
5.4.160.0270.05318.46
5.4.150.0300.07318.61
5.4.140.0300.05316.27
5.4.130.0270.04716.16
5.4.120.0300.04716.34
5.4.110.0270.04316.05
5.4.100.0200.05316.16
5.4.90.0230.05716.34
5.4.80.0300.04316.02
5.4.70.0200.06316.19
5.4.60.0270.04716.19
5.4.50.0200.05716.19
5.4.40.0270.05016.01
5.4.30.0270.05016.31
5.4.20.0130.06316.09
5.4.10.0130.05716.09
5.4.00.0170.05315.61
5.3.290.0230.05314.55
5.3.280.0170.05714.66
5.3.270.0170.06714.69
5.3.260.0170.06014.60
5.3.250.0270.05014.49
5.3.240.0300.05714.53
5.3.230.0400.04014.59
5.3.220.0300.05014.54
5.3.210.0200.06014.49
5.3.200.0200.05314.54
5.3.190.0130.06014.51
5.3.180.0100.06314.63
5.3.170.0130.06014.62
5.3.160.0300.04014.53
5.3.150.0200.05314.61
5.3.140.0300.06714.47
5.3.130.0300.06714.57
5.3.120.0200.06014.52
5.3.110.0230.06314.49
5.3.100.0230.04714.02
5.3.90.0200.05713.95
5.3.80.0130.06013.96
5.3.70.0200.05314.11
5.3.60.0200.05313.91
5.3.50.0130.06013.88
5.3.40.0130.06313.88
5.3.30.0170.05313.90
5.3.20.0230.05013.72
5.3.10.0200.05313.75
5.3.00.0270.04313.73
5.2.170.0130.04711.13
5.2.160.0100.04711.10
5.2.150.0130.04711.30
5.2.140.0270.04711.29
5.2.130.0200.05311.10
5.2.120.0200.03711.24
5.2.110.0200.05311.13
5.2.100.0170.05011.05
5.2.90.1000.03711.13
5.2.80.0070.05011.12
5.2.70.0170.04311.25
5.2.60.0200.04011.08
5.2.50.0170.04310.98
5.2.40.0200.04311.04
5.2.30.0270.04311.00
5.2.20.0070.05710.94
5.2.10.0100.04311.00
5.2.00.0200.03010.85
5.1.60.0100.0339.94
5.1.50.0170.03310.02
5.1.40.0070.04010.09
5.1.30.0070.04010.29
5.1.20.0100.04010.34
5.1.10.0130.03310.08
5.1.00.0100.03710.16
5.0.50.0030.0338.56
5.0.40.0030.0278.49
5.0.30.0030.0508.21
5.0.20.0100.0238.21
5.0.10.0100.0238.25
5.0.00.0070.0408.17
4.4.90.0170.0135.88
4.4.80.0070.0275.91
4.4.70.0070.0205.88
4.4.60.0030.0305.88
4.4.50.0070.0235.93
4.4.40.0030.0375.87
4.4.30.0000.0375.89
4.4.20.0030.0375.95
4.4.10.0030.0335.98
4.4.00.0130.0375.91
4.3.110.0070.0305.84
4.3.100.0170.0175.84
4.3.90.0100.0175.84
4.3.80.0100.0305.79
4.3.70.0030.0235.86
4.3.60.0100.0175.91
4.3.50.0070.0205.78
4.3.40.0070.0335.78
4.3.30.0070.0204.59
4.3.20.0030.0234.54
4.3.10.0070.0204.48
4.3.00.0100.0236.93

preferences:
41.55 ms | 401 KiB | 5 Q