3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr('', 0, 2)); var_dump(substr('a', 0, 2)); var_dump(substr('ab', 0, 2)); var_dump(substr('abc', 0, 2)); var_dump(substr('', -2)); var_dump(substr('a', -2)); var_dump(substr('ab', -2)); var_dump(substr('abc', -2));

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)
8.3.40.0140.00718.71
8.3.30.0100.00319.15
8.3.20.0050.00220.13
8.3.10.0080.00023.48
8.3.00.0040.00419.13
8.2.170.0090.01222.96
8.2.160.0070.01020.47
8.2.150.0030.00624.18
8.2.140.0080.00024.66
8.2.130.0000.00726.16
8.2.120.0000.00822.14
8.2.110.0070.01022.16
8.2.100.0040.00817.66
8.2.90.0000.00719.10
8.2.80.0080.00317.97
8.2.70.0040.00417.38
8.2.60.0070.00317.68
8.2.50.0040.00418.07
8.2.40.0040.00419.75
8.2.30.0000.00917.84
8.2.20.0000.00917.55
8.2.10.0040.00417.92
8.2.00.0030.00617.56
8.1.270.0060.00323.91
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0000.00823.70
8.1.230.0070.00419.14
8.1.220.0000.00817.74
8.1.210.0030.00518.77
8.1.200.0000.00817.10
8.1.190.0040.00417.13
8.1.180.0040.00418.10
8.1.170.0040.00418.53
8.1.160.0100.00021.98
8.1.150.0000.00818.57
8.1.140.0050.00217.37
8.1.130.0000.00817.80
8.1.120.0000.00817.17
8.1.110.0040.00417.19
8.1.100.0040.00417.33
8.1.90.0000.00817.23
8.1.80.0000.00717.41
8.1.70.0070.00017.19
8.1.60.0000.00817.38
8.1.50.0030.00517.41
8.1.40.0000.00817.29
8.1.30.0040.00417.34
8.1.20.0040.00417.52
8.1.10.0060.00317.30
8.1.00.0000.00717.34
8.0.300.0040.00420.73
8.0.290.0000.00716.80
8.0.280.0000.00718.23
8.0.270.0000.00717.24
8.0.260.0000.00717.00
8.0.250.0040.00416.87
8.0.240.0000.00716.82
8.0.230.0050.00316.72
8.0.220.0000.00816.78
8.0.210.0030.00316.66
8.0.200.0000.00816.75
8.0.190.0040.00416.82
8.0.180.0000.00716.81
8.0.170.0060.00316.83
8.0.160.0030.00516.62
8.0.150.0040.00416.60
8.0.140.0000.00716.70
8.0.130.0000.00513.13
8.0.120.0000.00816.63
8.0.110.0070.00016.80
8.0.100.0000.00816.76
8.0.90.0080.00016.71
8.0.80.0110.01116.72
8.0.70.0000.00716.71
8.0.60.0000.00716.83
8.0.50.0040.00416.65
8.0.30.0090.01016.85
8.0.20.0100.01017.40
8.0.10.0030.00516.95
8.0.00.0100.01116.67
7.4.330.0000.00515.08
7.4.320.0030.00316.38
7.4.300.0030.00316.46
7.4.290.0000.00716.44
7.4.280.0020.00516.38
7.4.270.0040.00416.50
7.4.260.0070.00016.32
7.4.250.0080.00016.43
7.4.240.0050.00216.47
7.4.230.0000.00716.55
7.4.220.0000.01816.57
7.4.210.0090.00616.37
7.4.200.0080.00016.50
7.4.190.0030.00316.27
7.4.160.0040.01316.43
7.4.150.0100.01417.40
7.4.140.0130.00617.86
7.4.130.0070.01016.41
7.4.120.0050.01116.33
7.4.110.0130.01016.26
7.4.100.0200.00016.30
7.4.90.0070.01116.22
7.4.80.0070.01119.39
7.4.70.0100.01116.53
7.4.60.0140.00716.44
7.4.50.0040.00016.56
7.4.40.0090.00522.77
7.4.30.0080.00816.38
7.4.00.0040.01414.50
7.3.330.0070.00012.89
7.3.320.0000.00512.86
7.3.310.0070.00016.09
7.3.300.0030.00516.13
7.3.290.0080.01116.09
7.3.280.0080.01016.17
7.3.270.0150.00917.40
7.3.260.0110.00716.36
7.3.250.0170.00316.23
7.3.240.0160.00016.23
7.3.230.0070.01016.39
7.3.210.0140.00416.12
7.3.200.0160.00619.39
7.3.190.0060.01716.14
7.3.180.0110.00616.35
7.3.170.0130.00516.27
7.3.160.0130.00416.16
7.3.120.0120.00614.60
7.3.110.0030.01414.66
7.3.100.0030.01014.63
7.3.90.0030.01314.49
7.3.80.0070.01014.60
7.3.70.0070.00714.67
7.3.60.0080.00314.59
7.3.50.0030.01414.41
7.3.40.0130.00314.57
7.3.30.0000.00914.64
7.3.20.0070.01016.23
7.3.10.0080.00516.55
7.3.00.0070.00616.52
7.2.330.0030.01516.25
7.2.320.0070.01316.32
7.2.310.0110.01116.29
7.2.300.0130.00716.25
7.2.290.0140.00316.59
7.2.240.0090.00614.58
7.2.230.0040.01215.03
7.2.220.0040.00714.81
7.2.210.0060.01214.43
7.2.200.0030.00914.71
7.2.190.0080.00814.75
7.2.180.0000.01414.95
7.2.170.0070.01014.82
7.2.160.0100.00714.94
7.2.150.0040.01116.61
7.2.140.0030.00916.33
7.2.130.0050.00916.69
7.2.120.0060.00716.75
7.2.110.0060.00916.71
7.2.100.0110.00416.50
7.2.90.0060.00816.54
7.2.80.0080.00816.54
7.2.70.0040.01116.52
7.2.60.0080.00516.61
7.2.50.0070.00616.70
7.2.40.0050.00816.78
7.2.30.0040.01316.73
7.2.20.0050.00816.86
7.2.10.0050.00516.64
7.2.00.0020.01217.55
7.1.330.0120.00315.84
7.1.320.0060.00915.57
7.1.310.0130.00315.74
7.1.300.0140.00315.64
7.1.290.0030.01315.49
7.1.280.0040.01215.76
7.1.270.0030.01215.65
7.1.260.0000.01415.69
7.1.250.0070.00715.68
7.1.200.0070.00715.28
7.1.100.0040.01118.00
7.1.70.0030.00716.99
7.1.60.0140.01019.46
7.1.50.0220.01534.73
7.1.00.0000.08022.40
7.0.200.0090.00416.20
7.0.140.0030.06722.00
7.0.60.0100.06719.95
7.0.50.0100.08017.82
7.0.40.0030.06019.98
7.0.30.0230.05020.17
7.0.20.0100.05020.04
7.0.10.0100.03720.00
7.0.00.0030.05020.30
5.6.280.0070.09021.09
5.6.210.0130.07320.50
5.6.200.0100.03318.21
5.6.190.0030.04320.33
5.6.180.0370.04320.35
5.6.170.0300.04720.48
5.6.160.0070.06020.49
5.6.150.0070.04718.18
5.6.140.0100.07718.18
5.6.130.0070.05018.21
5.6.120.0100.08020.99
5.6.110.0000.04320.99
5.6.100.0130.08020.98
5.6.90.0100.08320.88
5.6.80.0070.07020.40
5.6.70.1930.04020.34
5.5.350.0230.07720.40
5.5.340.0030.06017.93
5.5.330.0130.07720.19
5.5.320.0330.06720.51
5.5.310.0270.08320.12
5.5.300.0070.03318.02
5.5.290.0170.04318.00
5.5.280.0130.07720.87
5.5.270.0170.05720.86
5.5.260.0130.08320.72
5.5.250.0030.08720.68
5.5.240.0170.07320.23
5.4.450.0900.05319.40
5.4.440.0770.07019.54
5.4.430.0130.05019.27
5.4.420.0870.05019.53
5.4.410.0100.05319.19
5.4.400.0770.05019.12
5.4.390.0700.05319.15
5.4.380.0170.06018.61
5.4.370.0370.04318.68
5.4.360.0370.05718.68
5.4.350.0230.05318.74
5.4.340.0300.04318.59
5.4.320.0060.03712.45
5.4.310.0030.04212.45
5.4.300.0020.04012.45
5.4.290.0160.05712.43
5.4.280.0140.06312.33
5.4.270.0180.05512.34
5.4.260.0080.04712.33
5.4.250.0290.07012.33
5.4.240.0070.06712.33
5.4.230.0090.05012.33
5.4.220.0130.04712.32
5.4.210.0240.08912.32
5.4.200.0120.04112.32
5.4.190.0100.05712.32
5.4.180.0150.04212.32
5.4.170.0090.05312.33
5.4.160.0080.06612.33
5.4.150.0140.06312.33
5.4.140.0100.05612.01
5.4.130.0050.04012.00
5.4.120.0080.05311.96
5.4.110.0110.05411.95
5.4.100.0140.09811.95
5.4.90.0070.05511.95
5.4.80.0110.06411.95
5.4.70.0080.06311.95
5.4.60.0100.05111.95
5.4.50.0250.06811.95
5.4.40.0150.06811.93
5.4.30.0050.05611.93
5.4.20.0060.03511.93
5.4.10.0060.03411.94
5.4.00.0070.03511.42
5.3.290.0050.04012.80
5.3.280.0050.04312.71
5.3.270.0070.03912.72
5.3.260.0190.04012.71
5.3.250.0080.04612.72
5.3.240.0060.05112.72
5.3.230.0070.05212.70
5.3.220.0070.05412.68
5.3.210.0040.05912.68
5.3.200.0080.05812.68
5.3.190.0080.05512.68
5.3.180.0070.05712.67
5.3.170.0090.05712.66
5.3.160.0100.05412.67
5.3.150.0080.05912.68
5.3.140.0070.06112.66
5.3.130.0120.05812.66
5.3.120.0100.05412.66
5.3.110.0090.05312.65
5.3.100.0090.05412.12
5.3.90.0120.05212.09
5.3.80.0080.05712.08
5.3.70.0080.05112.08
5.3.60.0080.05912.06
5.3.50.0090.05512.00
5.3.40.0070.05512.00
5.3.30.0110.05011.94
5.3.20.0070.05611.72
5.3.10.0110.05311.69
5.3.00.0080.06011.68
5.2.170.0080.0569.18
5.2.160.0040.0499.18
5.2.150.0030.0709.18
5.2.140.0070.0459.18
5.2.130.0080.0569.13
5.2.120.0050.0439.14
5.2.110.0060.0439.14
5.2.100.0090.0419.14
5.2.90.0090.0339.14
5.2.80.0070.0369.14
5.2.70.0070.0329.13
5.2.60.0060.0359.09
5.2.50.0140.0869.06
5.2.40.0090.0389.03
5.2.30.0030.0669.01
5.2.20.0060.0329.00
5.2.10.0090.0458.92
5.2.00.0130.0448.78
5.1.60.0090.0308.06
5.1.50.0070.0318.05
5.1.40.0040.0308.04
5.1.30.0050.0438.39
5.1.20.0070.0408.41
5.1.10.0070.0298.14
5.1.00.0030.0398.13
5.0.50.0050.0256.62
5.0.40.0060.0246.47
5.0.30.0040.0326.29
5.0.20.0040.0236.26
5.0.10.0060.0226.23
5.0.00.0050.0316.23
4.4.90.0020.0194.78
4.4.80.0030.0244.76
4.4.70.0040.0194.75
4.4.60.0080.0204.75
4.4.50.0030.0184.77
4.4.40.0030.0384.71
4.4.30.0040.0224.76
4.4.20.0050.0234.85
4.4.10.0060.0184.85
4.4.00.0060.0344.75
4.3.110.0040.0224.67
4.3.100.0120.0264.67
4.3.90.0020.0404.63
4.3.80.0060.0374.58
4.3.70.0030.0264.63
4.3.60.0070.0254.63
4.3.50.0020.0294.63
4.3.40.0050.0334.54
4.3.30.0060.0263.28
4.3.20.0020.0273.26
4.3.10.0050.0223.22
4.3.00.0200.03310.54

preferences:
40.97 ms | 400 KiB | 5 Q