3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = ""; $str[0] = 1 << 7; var_dump($str); $str2 = "" . (1 << 7); var_dump($str2);

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)
8.3.60.0070.00718.43
8.3.50.0070.01118.06
8.3.40.0070.00719.02
8.3.30.0040.01118.79
8.3.20.0040.00419.11
8.3.10.0040.00421.82
8.3.00.0080.00019.80
8.2.180.0130.00716.60
8.2.170.0070.00722.96
8.2.160.0070.00719.05
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00419.83
8.2.120.0060.00326.35
8.2.110.0040.00720.94
8.2.100.0070.00417.91
8.2.90.0040.00417.98
8.2.80.0030.00519.95
8.2.70.0000.00817.90
8.2.60.0040.00417.93
8.2.50.0000.00918.10
8.2.40.0000.00819.09
8.2.30.0000.00719.43
8.2.20.0000.00818.09
8.2.10.0080.00017.98
8.2.00.0000.00819.55
8.1.280.0040.01125.92
8.1.270.0040.00423.80
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0060.00322.57
8.1.230.0070.00320.75
8.1.220.0000.00817.74
8.1.210.0030.00618.97
8.1.200.0040.00417.35
8.1.190.0000.00817.35
8.1.180.0080.00018.10
8.1.170.0000.00818.66
8.1.160.0040.00418.88
8.1.150.0000.00718.87
8.1.140.0000.00717.81
8.1.130.0060.00018.89
8.1.120.0020.00517.36
8.1.110.0050.00317.36
8.1.100.0040.00417.45
8.1.90.0040.00417.34
8.1.80.0070.00017.34
8.1.70.0000.01017.43
8.1.60.0000.00717.52
8.1.50.0050.00517.46
8.1.40.0000.00817.54
8.1.30.0000.00917.69
8.1.20.0000.00717.53
8.1.10.0000.00817.41
8.1.00.0000.00817.43
8.0.300.0050.00319.98
8.0.290.0000.00716.88
8.0.280.0050.00318.43
8.0.270.0000.00717.28
8.0.260.0060.00017.24
8.0.250.0030.00317.07
8.0.240.0040.00417.03
8.0.230.0000.00717.01
8.0.220.0030.00317.00
8.0.210.0000.00716.95
8.0.200.0030.00317.00
8.0.190.0060.00316.98
8.0.180.0030.00316.96
8.0.170.0080.00316.96
8.0.160.0090.00016.99
8.0.150.0000.00716.93
8.0.140.0000.00816.77
8.0.130.0000.00613.45
8.0.120.0000.00716.94
8.0.110.0060.00316.89
8.0.100.0040.00416.98
8.0.90.0000.00716.77
8.0.80.0100.00616.93
8.0.70.0040.00417.05
8.0.60.0000.00716.84
8.0.50.0080.00016.93
8.0.30.0100.00917.11
8.0.20.0120.00717.40
8.0.10.0030.00416.97
8.0.00.0110.00916.86
7.4.330.0020.00215.55
7.4.320.0030.00316.51
7.4.300.0060.00016.34
7.4.290.0040.00416.47
7.4.280.0040.00416.48
7.4.270.0000.00816.54
7.4.260.0040.00416.37
7.4.250.0000.00716.57
7.4.240.0000.00716.48
7.4.230.0060.00016.68
7.4.220.0040.00416.38
7.4.210.0070.00716.68
7.4.200.0000.00716.61
7.4.160.0100.00616.45
7.4.140.0110.01017.86
7.4.130.0090.00916.45
7.4.120.0130.00716.45
7.4.110.0100.00716.52
7.4.100.0130.00316.65
7.4.90.0070.01016.55
7.4.80.0100.01319.39
7.4.70.0090.00916.43
7.4.60.0160.00716.27
7.4.50.0070.01016.27
7.4.40.0030.01316.65
7.4.00.0060.00615.07
7.3.330.0030.00513.13
7.3.320.0030.00312.99
7.3.310.0060.00016.24
7.3.300.0000.00716.23
7.3.290.0000.00716.32
7.3.280.0080.00916.25
7.3.260.0120.00716.26
7.3.240.0140.00616.34
7.3.230.0090.01216.24
7.3.210.0070.01116.28
7.3.200.0110.00816.34
7.3.190.0110.00716.16
7.3.180.0060.01616.58
7.3.170.0080.00816.25
7.3.160.0090.00716.58
7.2.330.0110.00716.67
7.2.320.0070.01116.59
7.2.310.0040.01416.62
7.2.300.0070.01716.63
7.2.290.0160.00616.26
7.2.60.0000.01116.94
7.2.40.1650.00917.87
7.2.30.1400.00817.63
7.2.20.1270.01017.81
7.2.10.1360.00717.89
7.2.00.1580.00917.87
7.1.200.0060.00615.54
7.1.160.1230.01016.78
7.1.150.1460.00716.70
7.1.140.1320.00716.71
7.1.130.1460.00816.83
7.1.120.1600.00916.92
7.1.110.1820.00916.18
7.1.100.1800.00816.24
7.1.90.1820.00716.27
7.1.80.1800.00916.16
7.1.70.1530.00815.30
7.1.60.1770.01033.25
7.1.50.2150.01232.89
7.1.40.2560.01432.56
7.1.30.1940.01232.70
7.1.20.2390.01232.83
7.1.10.1930.00714.66
7.1.00.1570.01014.68

preferences:
31.58 ms | 400 KiB | 5 Q