3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr('FooBar', 42)); var_dump(substr('FooBar', -42, 3)); var_dump(substr('FooBar', 42, 3)); var_dump(mb_substr('FooBar', 42, 3)); var_dump(iconv_substr('FooBar', 42, 3)); var_dump(grapheme_substr('FooBar', 42, 3));

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)
8.3.60.0100.00718.30
8.3.50.0070.01316.22
8.3.40.0130.00322.00
8.3.30.0090.00618.55
8.3.20.0080.00024.18
8.3.10.0070.00024.66
8.3.00.0040.00426.16
8.2.180.0160.00625.92
8.2.170.0120.00418.83
8.2.160.0070.00722.96
8.2.150.0040.00425.66
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0080.00026.35
8.2.110.0070.00320.39
8.2.100.0180.00017.44
8.2.90.0060.00317.50
8.2.80.0050.00318.64
8.2.70.0000.00817.50
8.2.60.0030.00617.38
8.2.50.0030.00517.55
8.2.40.0000.00819.82
8.2.30.0040.00417.87
8.2.20.0040.00417.83
8.2.10.0000.00719.03
8.2.00.0040.00419.00
8.1.280.0070.00725.92
8.1.270.0040.00723.83
8.1.260.0040.00428.09
8.1.250.0030.00628.09
8.1.240.0110.00020.42
8.1.230.0080.00422.12
8.1.220.0040.00417.74
8.1.210.0050.00318.77
8.1.200.0030.00617.23
8.1.190.0050.00317.23
8.1.180.0000.00818.10
8.1.170.0000.00718.96
8.1.160.0000.00818.67
8.1.150.0000.00718.63
8.1.140.0000.00718.82
8.1.130.0080.00020.07
8.1.120.0050.00217.29
8.1.110.0040.00417.25
8.1.100.0070.00017.23
8.1.90.0050.00217.34
8.1.80.0000.00817.21
8.1.70.0040.00417.18
8.1.60.0050.00317.47
8.1.50.0040.00417.38
8.1.40.0040.00417.47
8.1.30.0050.00317.47
8.1.20.0000.00817.56
8.1.10.0070.00017.36
8.1.00.0000.00817.41
8.0.300.0000.00918.77
8.0.290.0000.00716.63
8.0.280.0030.00318.34
8.0.270.0040.00417.82
8.0.260.0060.00018.42
8.0.250.0000.00716.77
8.0.240.0030.00516.86
8.0.230.0000.00816.90
8.0.220.0050.00316.85
8.0.210.0000.00716.85
8.0.200.0000.00816.87
8.0.190.0000.00716.81
8.0.180.0000.00816.83
8.0.170.0050.00316.67
8.0.160.0060.00316.71
8.0.150.0050.00316.81
8.0.140.0100.00016.79
8.0.130.0000.00613.33
8.0.120.0040.00416.98
8.0.110.0030.00616.93
8.0.100.0060.00316.96
8.0.90.0040.00416.86
8.0.80.0020.01716.91
8.0.70.0060.00316.82
8.0.60.0060.00316.95
8.0.50.0000.00917.02
8.0.30.0090.00917.27
8.0.20.0140.00716.98
8.0.10.0000.00917.11
8.0.00.0180.01116.48
7.4.330.0050.00015.55
7.4.320.0000.00716.24
7.4.300.0030.00316.38
7.4.290.0040.00416.36
7.4.280.0040.00416.46
7.4.270.0070.00016.45
7.4.260.0030.00313.31
7.4.250.0000.00816.42
7.4.240.0050.00316.37
7.4.230.0030.00516.31
7.4.220.0040.00416.49
7.4.210.0060.01316.57
7.4.200.0000.00816.50
7.4.130.0130.00916.53
7.4.120.0110.01316.75
7.4.110.0150.00516.58
7.4.100.0120.01116.01
7.4.90.0100.01016.23
7.4.80.0070.01516.21
7.4.70.0110.01316.40
7.4.60.0130.00916.36
7.4.50.0120.01316.36
7.4.40.0100.01516.24
7.4.30.0110.01316.19
7.4.20.0190.00816.40
7.4.10.0110.01116.48
7.4.00.0140.00616.30
7.3.330.0000.00716.27
7.3.320.0030.00313.00
7.3.310.0040.00416.36
7.3.300.0000.00816.38
7.3.290.0100.00716.27
7.3.260.0120.00816.27
7.3.230.0130.00816.16
7.3.220.0160.00816.27
7.3.210.0120.01016.03
7.3.200.0140.01016.28
7.3.190.0160.00816.19
7.3.180.0140.00816.03
7.3.170.0100.01616.54
7.3.160.0090.01516.12
7.3.150.0190.01116.34
7.3.140.0100.00916.32
7.3.130.0130.00616.17
7.3.120.0150.00516.33
7.3.110.0110.00816.32
7.3.100.0180.00916.43
7.3.90.0200.01016.42
7.3.80.0140.01416.34
7.3.70.0170.01116.35
7.3.60.0160.01216.45
7.3.50.0140.01716.50
7.3.40.0160.00916.21
7.3.30.0120.00916.37
7.3.20.0110.01216.39
7.3.10.0050.01616.31
7.3.00.0080.01416.39
7.2.340.0210.01016.49
7.2.330.0090.01216.37
7.2.320.0120.00916.34
7.2.310.0210.00316.25
7.2.300.0110.01316.35
7.2.290.0120.01116.32
7.2.280.0250.00516.64
7.2.270.0170.00816.58
7.2.260.0120.01216.54
7.2.250.0090.01416.52
7.2.240.0130.01616.40
7.2.230.0180.00916.43
7.2.220.0140.01416.59
7.2.210.0140.01316.54
7.2.200.0200.00916.47
7.2.190.0230.00916.63
7.2.180.0200.01216.35
7.2.170.0110.01016.31
7.2.160.0110.00916.51
7.2.150.0080.01316.59
7.2.140.0120.01116.50
7.2.130.0120.01116.57
7.2.120.0100.01216.57
7.2.110.0090.01216.56
7.2.100.0110.01116.64
7.2.90.0150.00616.48
7.2.80.0090.01316.55
7.2.70.0110.01116.48
7.2.60.0140.01516.49
7.2.50.0140.00616.46
7.2.40.0110.00916.59
7.2.30.0150.00916.76
7.2.20.0140.01216.57
7.2.10.0100.01016.71
7.2.00.0080.01216.36

preferences:
75.2 ms | 400 KiB | 5 Q