3v4l.org

run code in 300+ PHP versions simultaneously
<?php function initialiseStr($var) { return isset($var) ? $var : ''; } $foo = initialiseStr($foo); var_dump($foo);

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)
8.3.70.0150.00018.55
8.3.60.0070.00718.30
8.3.50.0130.00321.99
8.3.40.0100.00718.71
8.3.30.0120.00918.58
8.3.20.0040.00418.50
8.3.10.0030.00620.75
8.3.00.0040.00419.31
8.2.180.0120.00616.50
8.2.170.0110.00322.96
8.2.160.0070.00720.45
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0080.00021.13
8.2.110.0060.00320.36
8.2.100.0060.00617.78
8.2.90.0030.00619.58
8.2.80.0000.00819.36
8.2.70.0000.00817.63
8.2.60.0110.00217.43
8.2.50.0140.00318.07
8.2.40.0090.00019.88
8.2.30.0040.00717.95
8.2.20.0050.00317.50
8.2.10.0000.00717.78
8.2.00.0000.01017.59
8.1.280.0070.01425.92
8.1.270.0070.00023.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0040.00422.42
8.1.230.0080.00422.68
8.1.220.0000.00817.74
8.1.210.0080.00018.89
8.1.200.0090.00017.23
8.1.190.0000.00717.23
8.1.180.0040.00418.10
8.1.170.0050.00318.96
8.1.160.0070.00018.78
8.1.150.0000.00918.63
8.1.140.0000.00817.43
8.1.130.0050.00317.73
8.1.120.0030.00317.38
8.1.110.0080.00017.38
8.1.100.0040.00417.43
8.1.90.0030.00517.42
8.1.80.0040.00417.34
8.1.70.0070.00017.36
8.1.60.0050.00317.63
8.1.50.0040.00417.45
8.1.40.0060.00317.53
8.1.30.0070.00017.64
8.1.20.0000.00817.63
8.1.10.0040.00417.49
8.1.00.0020.00517.34
8.0.300.0030.00619.95
8.0.290.0040.00416.63
8.0.280.0030.00318.38
8.0.270.0020.00517.96
8.0.260.0030.00316.80
8.0.250.0040.00416.89
8.0.240.0040.00416.87
8.0.230.0000.00716.84
8.0.220.0030.00316.91
8.0.210.0000.00716.80
8.0.200.0060.00017.01
8.0.190.0030.00616.87
8.0.180.0000.00716.87
8.0.170.0000.00816.84
8.0.160.0030.00316.82
8.0.150.0040.00416.80
8.0.140.0000.00716.86
8.0.130.0000.00613.27
8.0.120.0040.00416.88
8.0.110.0040.00416.74
8.0.100.0000.00816.71
8.0.90.0070.00016.75
8.0.80.0090.01216.89
8.0.70.0000.00816.88
8.0.60.0000.00716.87
8.0.50.0040.00416.85
8.0.30.0140.00617.09
8.0.20.0180.01717.40
8.0.10.0050.00216.79
8.0.00.0120.00916.65
7.4.330.0050.00016.79
7.4.320.0030.00316.52
7.4.300.0060.00016.59
7.4.290.0070.00016.42
7.4.280.0000.00716.57
7.4.270.0070.00016.59
7.4.260.0030.00313.26
7.4.250.0050.00216.50
7.4.240.0000.00716.45
7.4.230.0000.00716.25
7.4.220.0120.00616.55
7.4.210.0080.00716.48
7.4.200.0030.00316.29
7.4.190.0000.00716.47
7.4.160.0100.00616.41
7.4.150.0120.00617.40
7.4.140.0110.00817.86
7.4.130.0100.01016.44
7.4.120.0110.00516.51
7.4.110.0120.00916.53
7.4.100.0070.01016.56
7.4.90.0090.00916.45
7.4.80.0120.00619.39
7.4.70.0100.00716.44
7.4.60.0090.00916.60
7.4.50.0090.00016.39
7.4.40.0030.01322.77
7.4.30.0100.00716.56
7.4.00.0070.01014.91
7.3.330.0050.00013.27
7.3.320.0030.00313.12
7.3.310.0060.00016.12
7.3.300.0050.00216.36
7.3.290.0100.00316.19
7.3.280.0090.00716.32
7.3.270.0070.01617.40
7.3.260.0110.00518.24
7.3.250.0080.01116.35
7.3.240.0040.01816.35
7.3.230.0160.00016.39
7.3.210.0160.00416.38
7.3.200.0070.01119.39
7.3.190.0130.00416.47
7.3.180.0040.01116.30
7.3.170.0100.00516.60
7.3.160.0130.00816.24
7.3.120.0050.01014.86
7.3.110.0030.01314.79
7.3.100.0040.01114.62
7.3.90.0060.01014.73
7.3.80.0080.00414.71
7.3.70.0000.01614.70
7.3.60.0090.00314.53
7.3.50.0040.01114.68
7.3.40.0060.00614.57
7.3.30.0060.00614.75
7.3.20.0130.00316.71
7.3.10.0060.01116.48
7.3.00.0030.01016.57
7.2.330.0080.00916.45
7.2.320.0100.00716.63
7.2.310.0060.01216.67
7.2.300.0110.00716.66
7.2.290.0040.01716.48
7.2.250.0000.01815.00
7.2.240.0060.01214.81
7.2.230.0060.00915.11
7.2.220.0120.00414.79
7.2.210.0040.00714.89
7.2.200.0070.01014.92
7.2.190.0030.00714.93
7.2.180.0060.00914.96
7.2.170.0030.01414.97
7.2.80.0070.00316.69
7.2.60.0000.01216.80
7.2.00.0060.00619.20
7.1.330.0000.01315.73
7.1.320.0060.00915.85
7.1.310.0030.00815.61
7.1.300.0070.01015.77
7.1.290.0110.00415.67
7.1.280.0060.01015.52
7.1.270.0030.01315.76
7.1.260.0110.00315.64
7.1.200.0100.00315.66
7.1.100.0000.01318.03
7.1.70.0000.00717.19
7.1.60.0040.00717.13
7.1.50.0070.00317.04
7.1.40.0040.00716.60
7.1.30.0100.00316.85
7.1.20.0040.00716.73
7.1.10.0040.00416.70
7.1.00.0040.01116.75
7.0.200.0000.00716.58
7.0.190.0030.00316.63
7.0.180.0040.00416.58
7.0.170.0030.00516.58
7.0.160.0050.00216.58
7.0.150.0040.00916.58
7.0.140.0080.00316.58
7.0.130.0040.01116.58
7.0.120.0000.01316.58
7.0.110.0050.00516.58
7.0.100.0030.01216.58
7.0.90.0030.01416.58
7.0.80.0000.00916.58
7.0.70.0030.01216.58
7.0.60.0030.01316.58
7.0.50.0070.01016.58
7.0.40.0070.00016.58
7.0.30.0000.00716.58
7.0.20.0040.01216.58
7.0.10.0030.00916.58
7.0.00.0080.00016.58
5.6.300.0030.05220.91
5.6.290.0070.03920.68
5.6.280.0030.06020.89
5.6.270.0000.04420.79
5.6.260.0000.04720.95
5.6.250.0030.04020.88
5.6.240.0130.03220.97
5.6.230.0100.07620.84
5.6.220.0030.06220.79
5.6.210.0040.04221.03
5.6.200.0000.05320.96
5.6.190.0060.04220.91
5.6.180.0100.03420.91
5.6.170.0070.04620.91
5.6.160.0030.04021.04
5.6.150.0030.04120.96
5.6.140.0000.04520.82
5.6.130.0030.04120.76
5.6.120.0000.05020.73
5.6.110.0000.04420.81
5.6.100.0070.08420.98
5.6.90.0070.03720.84
5.6.80.0030.07120.25
5.6.70.0000.04620.33
5.6.60.0070.04720.20
5.6.50.0060.07120.29
5.6.40.0070.06620.37
5.6.30.0070.03720.09
5.6.20.0070.07020.12
5.6.10.0000.05420.30
5.6.00.0070.04320.38
5.5.380.0000.04217.44
5.5.370.0000.04117.57
5.5.360.0070.03717.54
5.5.350.0000.05517.52
5.5.340.0030.06018.03
5.5.330.0000.05918.04
5.5.320.0000.04718.14
5.5.310.0070.04418.08
5.5.300.0000.06218.07
5.5.290.0030.04517.71
5.5.280.0070.08518.06
5.5.270.0070.06617.82
5.5.260.0070.07117.73
5.5.250.0030.04417.84
5.5.240.0000.05117.13
5.5.230.0100.03717.40
5.5.220.0030.03717.43
5.5.210.0060.04417.39
5.5.200.0000.04117.41
5.5.190.0000.04117.10
5.5.180.0000.05217.44
5.5.160.0000.04617.48
5.5.150.0000.04817.33
5.5.140.0000.04417.35
5.5.130.0100.03817.46
5.5.120.0070.04717.19
5.5.110.0000.04317.44
5.5.100.0100.03617.31
5.5.90.0070.03417.13
5.5.80.0070.03317.32
5.5.70.0070.03617.36
5.5.60.0000.05016.94
5.5.50.0100.05017.01
5.5.40.0070.03416.98
5.5.30.0100.03517.24
5.5.20.0070.04517.10
5.5.10.0030.04417.32
5.5.00.0030.04017.40
5.4.450.0070.04319.56
5.4.440.0000.05119.44
5.4.430.0070.07319.21
5.4.420.0070.03819.39
5.4.410.0030.04619.43
5.4.400.0100.04119.08
5.4.390.0030.04819.21
5.4.380.0060.03519.00
5.4.370.0030.05019.09
5.4.360.0000.04718.98
5.4.350.0070.03619.17
5.4.340.0000.04618.94
5.4.320.0030.04319.23
5.4.310.0070.03719.15
5.4.300.0160.03319.19
5.4.290.0130.03018.89
5.4.280.0100.03519.19
5.4.270.0060.03419.06
5.4.260.0100.03818.95
5.4.250.0000.04019.20
5.4.240.0030.04419.02
5.4.230.0060.04119.06
5.4.220.0000.05419.07
5.4.210.0030.05419.07
5.4.200.0000.04419.07
5.4.190.0310.03119.19
5.4.180.0070.04218.91
5.4.170.0030.04219.10
5.4.160.0030.03819.20
5.4.150.0270.04019.11
5.4.140.0070.03316.58
5.4.130.0070.03516.58
5.4.120.0030.03816.58
5.4.110.0040.04316.69
5.4.100.0030.04616.76
5.4.90.0040.04316.70
5.4.80.0030.03916.72
5.4.70.0030.03816.59
5.4.60.0070.03516.58
5.4.50.0040.04216.58
5.4.40.0150.03416.67
5.4.30.0040.04116.58
5.4.20.0070.07016.61
5.4.10.0070.04316.70
5.4.00.0100.03516.58
5.3.290.0200.05016.58
5.3.280.0100.03016.58
5.3.270.0100.05116.58
5.3.260.0060.03916.58
5.3.250.0100.04216.58
5.3.240.0030.03616.58
5.3.230.0030.03916.58
5.3.220.0030.04016.58
5.3.210.0070.04316.58
5.3.200.0030.03716.58
5.3.190.0070.04016.58
5.3.180.0070.03316.58
5.3.170.0000.04416.58
5.3.160.0340.03416.58
5.3.150.0030.04216.58
5.3.140.0070.03616.58
5.3.130.0030.04116.58
5.3.120.0210.02716.58
5.3.110.0150.03316.58
5.3.100.0070.04116.58
5.3.90.0030.05716.58
5.3.80.0070.04016.58
5.3.70.0000.04316.58
5.3.60.0000.04316.58
5.3.50.0030.04116.58
5.3.40.0100.03516.58
5.3.30.0000.04316.58
5.3.20.0060.03216.58
5.3.10.0040.04416.58
5.3.00.0000.05516.58
5.2.170.0000.04016.58
5.2.160.0090.02416.58
5.2.150.0060.03816.58
5.2.140.0030.03716.58
5.2.130.0110.03116.58
5.2.120.0000.03716.58
5.2.110.0080.02416.58
5.2.100.0060.02616.58
5.2.90.0000.03116.58
5.2.80.0030.03116.58
5.2.70.0000.03616.58
5.2.60.0100.02516.58
5.2.50.0000.04116.58
5.2.40.0030.03116.58
5.2.30.0040.02816.58
5.2.20.0030.03116.58
5.2.10.0060.03416.58
5.2.00.0070.05216.58
5.1.60.0000.04016.58
5.1.50.0100.02216.58
5.1.40.0030.02516.58
5.1.30.0030.02516.58
5.1.20.0030.02616.58
5.1.10.0080.02216.58
5.1.00.0000.02716.58
5.0.50.0000.02416.58
5.0.40.0040.02216.58
5.0.30.0070.03116.58
5.0.20.0030.02816.58
5.0.10.0000.04216.58
5.0.00.0100.06016.58
4.4.90.0000.03416.58
4.4.80.0000.01916.58
4.4.70.0060.01216.58
4.4.60.0090.01816.58
4.4.50.0030.01416.58
4.4.40.0070.02016.58
4.4.30.0000.01816.58
4.4.20.0030.02116.58
4.4.10.0000.02416.58
4.4.00.0030.02416.58
4.3.110.0000.01716.58
4.3.100.0030.01416.58
4.3.90.0060.01116.58
4.3.80.0000.03216.58
4.3.70.0030.02016.58
4.3.60.0030.01616.58
4.3.50.0040.01816.58
4.3.40.0030.02916.58
4.3.30.0030.01716.58
4.3.20.0030.01716.58
4.3.10.0030.01516.58
4.3.00.0000.01716.58

preferences:
53.81 ms | 404 KiB | 6 Q