3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "Bbbbbbb Bbb\u{00E4}b\u{00E4} Bbbbb\u{00E4}"; var_dump($str); var_dump(strlen($str)); var_dump(substr($str,0,28)); var_dump(['key' => substr($str,0,28)]);

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)
8.3.60.0070.00718.31
8.3.50.0100.00716.40
8.3.40.0080.00821.77
8.3.30.0150.00018.48
8.3.20.0080.00024.18
8.3.10.0000.00824.66
8.3.00.0000.00826.16
8.2.180.0040.01825.92
8.2.170.0130.00718.84
8.2.160.0040.01122.96
8.2.150.0080.00025.66
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0030.00320.97
8.2.110.0000.00822.27
8.2.100.0040.00817.84
8.2.90.0030.00517.75
8.2.80.0040.00418.64
8.2.70.0050.00317.50
8.2.60.0040.00417.50
8.2.50.0050.00318.07
8.2.40.0050.00218.22
8.2.30.0070.00018.11
8.2.20.0000.00717.96
8.2.10.0000.00820.99
8.2.00.0060.00319.17
8.1.280.0070.00725.92
8.1.270.0090.00022.14
8.1.260.0040.00426.35
8.1.250.0030.00628.09
8.1.240.0060.00323.78
8.1.230.0070.00422.63
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0040.00417.23
8.1.190.0040.00917.00
8.1.180.0060.00318.10
8.1.170.0040.00818.50
8.1.160.0000.00818.77
8.1.150.0040.00418.80
8.1.140.0050.00318.73
8.1.130.0040.00420.06
8.1.120.0000.00717.28
8.1.110.0030.00517.35
8.1.100.0000.00717.30
8.1.90.0030.00517.28
8.1.80.0040.00417.35
8.1.70.0030.00317.43
8.1.60.0040.00417.49
8.1.50.0040.00417.38
8.1.40.0000.00817.38
8.1.30.0030.00517.63
8.1.20.0040.00417.61
8.1.10.0040.00417.61
8.1.00.0000.00717.48
8.0.300.0070.00418.77
8.0.290.0040.00416.63
8.0.280.0000.00818.38
8.0.270.0040.00417.85
8.0.260.0060.00018.30
8.0.250.0070.00016.88
8.0.240.0030.00316.84
8.0.230.0030.00316.94
8.0.220.0030.00316.80
8.0.210.0000.00716.81
8.0.200.0030.00516.86
8.0.190.0030.00516.88
8.0.180.0040.00416.85
8.0.170.0060.00316.72
8.0.160.0040.00416.80
8.0.150.0000.00716.71
8.0.140.0090.00016.83
8.0.130.0000.00613.28
8.0.120.0060.00316.82
8.0.110.0050.00316.80
8.0.100.0040.00316.68
8.0.90.0030.00416.86
8.0.80.0060.00916.75
8.0.70.0040.00416.74
8.0.60.0040.00416.76
8.0.50.0000.00716.80
8.0.30.0070.01017.06
8.0.20.0110.00817.00
8.0.10.0000.00817.05
8.0.00.0160.00316.60
7.4.330.0050.00015.55
7.4.320.0000.00716.55
7.4.300.0000.00616.53
7.4.290.0030.00316.43
7.4.280.0040.00416.48
7.4.270.0000.00716.43
7.4.260.0000.00513.26
7.4.250.0030.00316.34
7.4.240.0030.00316.51
7.4.230.0050.00216.51
7.4.220.0040.00316.49
7.4.210.0050.01016.50
7.4.200.0030.00316.59
7.4.130.0100.00716.37
7.4.120.0040.01316.63
7.4.110.0100.00716.48
7.4.100.0060.01016.43
7.4.90.0090.00916.45
7.4.80.0140.00316.36
7.4.70.0130.00316.55
7.4.60.0060.01816.55
7.4.50.0060.01216.27
7.4.40.0120.00616.45
7.4.30.0180.00016.50
7.4.20.0070.01016.30
7.4.10.0060.01316.56
7.4.00.0070.01116.28
7.3.330.0040.00416.19
7.3.320.0030.00313.19
7.3.310.0000.00716.34
7.3.300.0030.00316.27
7.3.290.0080.00916.25
7.3.260.0090.00916.15
7.3.230.0000.01816.43
7.3.220.0120.00616.70
7.3.210.0110.00616.64
7.3.200.0110.00716.50
7.3.190.0120.01216.34
7.3.180.0080.00916.26
7.3.170.0120.01216.38
7.3.160.0150.00316.36
7.3.150.0130.01016.57
7.3.140.0130.01016.23
7.3.130.0090.00916.26
7.3.120.0060.01316.60
7.3.110.0090.01216.45
7.3.100.0100.00716.26
7.3.90.0100.01016.52
7.3.80.0120.00916.41
7.3.70.0130.00316.36
7.3.60.0060.01216.34
7.3.50.0120.00616.40
7.3.40.0170.00016.18
7.3.30.0110.00716.50
7.3.20.0100.00716.25
7.3.10.0130.00316.34
7.3.00.0070.01016.27
7.2.340.0190.00016.39
7.2.330.0110.00716.24
7.2.320.0150.00416.42
7.2.310.0140.00316.35
7.2.300.0130.00416.50
7.2.290.0030.01516.47
7.2.280.0180.00616.59
7.2.270.0040.01316.48
7.2.260.0040.01416.34
7.2.250.0130.00916.52
7.2.240.0130.00916.57
7.2.230.0030.01416.67
7.2.220.0130.01316.57
7.2.210.0190.00016.59
7.2.200.0150.00316.45
7.2.190.0110.00716.41
7.2.180.0140.00316.45
7.2.170.0070.01016.45
7.2.160.0100.00716.42
7.2.150.0030.01516.39
7.2.140.0090.00916.59
7.2.130.0090.00916.66
7.2.120.0460.01016.55
7.2.110.0120.00616.36
7.2.100.0130.00916.64
7.2.90.0060.01516.41
7.2.80.0100.01016.75
7.2.70.0090.01116.41
7.2.60.0100.00716.43
7.2.50.0100.01016.45
7.2.40.0120.00616.58
7.2.30.0090.00916.56
7.2.20.0090.01216.43
7.2.10.0040.01416.38
7.2.00.0030.01816.68

preferences:
46.94 ms | 400 KiB | 5 Q