3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(iconv_substr('20', 2, 1));

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)
8.3.60.0120.00318.43
8.3.50.0040.01118.05
8.3.40.0100.01018.42
8.3.30.0090.00618.71
8.3.20.0040.00418.99
8.3.10.0040.00421.87
8.3.00.0040.00420.77
8.2.180.0060.01017.91
8.2.170.0180.00322.96
8.2.160.0130.00320.49
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00421.96
8.2.120.0000.00726.35
8.2.110.0150.00321.06
8.2.100.0110.00517.72
8.2.90.0000.00917.77
8.2.80.0000.00817.97
8.2.70.0040.00417.79
8.2.60.0000.00718.22
8.2.50.0040.00418.10
8.2.40.0000.00822.24
8.2.30.0000.00819.18
8.2.20.0000.00817.94
8.2.10.0080.00017.99
8.2.00.0040.00417.60
8.1.280.0100.00725.92
8.1.270.0060.00323.99
8.1.260.0040.00428.09
8.1.250.0030.00628.09
8.1.240.0100.00022.13
8.1.230.0150.00020.73
8.1.220.0000.00817.74
8.1.210.0040.00418.84
8.1.200.0000.00817.23
8.1.190.0060.00317.23
8.1.180.0000.00818.10
8.1.170.0090.00020.55
8.1.160.0040.00418.84
8.1.150.0070.00020.33
8.1.140.0040.00419.29
8.1.130.0040.00417.69
8.1.120.0000.00817.39
8.1.110.0000.00717.27
8.1.100.0040.00417.27
8.1.90.0070.00017.37
8.1.80.0070.00017.30
8.1.70.0030.00317.32
8.1.60.0000.00817.46
8.1.50.0060.00317.43
8.1.40.0000.00817.46
8.1.30.0040.00417.37
8.1.20.0000.00717.52
8.1.10.0040.00417.41
8.1.00.0040.00417.37
8.0.300.0070.00019.60
8.0.290.0080.00016.63
8.0.280.0000.00718.27
8.0.270.0000.00717.07
8.0.260.0030.00317.05
8.0.250.0030.00316.81
8.0.240.0000.00716.89
8.0.230.0020.00516.84
8.0.220.0040.00416.66
8.0.210.0000.00716.78
8.0.200.0090.00016.69
8.0.190.0040.00416.73
8.0.180.0030.00316.68
8.0.170.0000.00816.78
8.0.160.0000.00816.66
8.0.150.0030.00516.64
8.0.140.0040.00416.63
8.0.130.0050.00313.17
8.0.120.0030.00616.91
8.0.110.0030.00616.88
8.0.100.0040.00416.86
8.0.90.0060.00316.93
8.0.80.0000.01716.84
8.0.70.0000.00916.92
8.0.60.0060.00316.78
8.0.50.0030.00616.93
8.0.30.0070.01517.10
8.0.20.0130.00817.40
8.0.10.0000.00817.04
8.0.00.0030.02016.83
7.4.330.0050.00015.55
7.4.320.0000.00716.37
7.4.300.0000.00616.36
7.4.290.0040.00416.45
7.4.280.0040.00416.41
7.4.270.0000.00716.43
7.4.260.0000.00816.45
7.4.250.0090.00016.48
7.4.240.0030.00616.57
7.4.230.0000.00816.71
7.4.220.0130.00916.69
7.4.210.0120.01216.61
7.4.200.0060.00316.40
7.4.160.0110.00616.43
7.4.150.0150.00617.40
7.4.140.0110.01217.86
7.4.130.0070.01216.46
7.4.120.0130.01016.48
7.4.110.0070.01416.43
7.4.100.0090.00916.49
7.4.90.0100.01016.26
7.4.80.0120.00919.39
7.4.70.0170.00316.43
7.4.60.0090.00916.51
7.4.50.0040.01116.30
7.4.40.0100.00716.20
7.4.30.0090.00916.47
7.4.00.0090.00914.88
7.3.330.0000.00513.14
7.3.320.0000.00613.18
7.3.310.0040.00416.34
7.3.300.0000.00916.32
7.3.290.0120.00516.30
7.3.280.0070.01316.26
7.3.270.0150.00417.40
7.3.260.0080.01116.36
7.3.250.0150.00716.32
7.3.240.0110.01116.53
7.3.230.0130.00716.39
7.3.210.0070.01116.23
7.3.200.0040.01416.55
7.3.190.0150.00316.21
7.3.180.0060.01216.35
7.3.170.0060.01316.30
7.3.160.0040.02116.32
7.2.330.0160.00616.29
7.2.320.0080.01116.31
7.2.310.0170.00316.55
7.2.300.0130.00716.43
7.2.290.0120.01216.57
7.2.60.0090.00616.51
7.2.00.0000.01119.11
7.1.200.0030.00915.67
7.1.100.0000.01617.87
7.1.70.0000.00917.29
7.1.60.0070.00717.29
7.1.50.0070.01716.91
7.1.00.0230.07020.64
7.0.200.0000.00816.79
7.0.130.0270.06320.34
7.0.120.0330.06720.27
7.0.110.0270.06320.30
7.0.100.0470.05720.42
7.0.90.0430.05320.50
7.0.80.0300.05720.27
7.0.70.0300.06720.46
7.0.60.0370.05320.35
7.0.50.0330.06720.48
7.0.40.0230.06320.33
7.0.30.0170.07320.26
7.0.20.0330.05720.42
7.0.10.0300.06020.46
7.0.00.0330.05320.31
5.6.280.0130.06021.20
5.6.270.0170.05320.94
5.6.260.0170.05321.07
5.6.250.0200.05321.19
5.6.240.0170.06020.94
5.6.230.0200.06020.94
5.6.220.0000.07721.21
5.6.210.0170.07021.05
5.6.200.0030.08020.90
5.6.190.0170.05320.91
5.6.180.0170.05721.00
5.6.170.0070.06721.17
5.6.160.0200.05321.20
5.6.150.0030.07021.17
5.6.140.0200.05021.18
5.6.130.0300.06021.18
5.6.120.0170.06321.09
5.6.110.0130.05720.96
5.6.100.0230.05721.16
5.6.90.0230.06020.90
5.6.80.0230.05320.27
5.6.70.0070.06320.57
5.6.60.0100.06020.57
5.6.50.0100.06320.32
5.6.40.0100.06320.36
5.6.30.0100.05720.36
5.6.20.0100.07020.53
5.6.10.0130.07720.34
5.6.00.0170.06720.57

preferences:
75.41 ms | 400 KiB | 5 Q