3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(iconv_substr("a\x00b\x00", 0, 1, 'UTF-16LE')); var_dump(iconv_substr("\x00a\x00b", 0, 1, 'UTF-16BE'));

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)
8.3.60.0040.01116.75
8.3.50.0130.00521.09
8.3.40.0110.00418.60
8.3.30.0070.00718.79
8.3.20.0080.00020.34
8.3.10.0000.00721.74
8.3.00.0050.00319.66
8.2.180.0070.01116.38
8.2.170.0140.00022.96
8.2.160.0000.01320.35
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00422.25
8.2.110.0030.00620.31
8.2.100.0060.00617.66
8.2.90.0000.00817.78
8.2.80.0050.00317.97
8.2.70.0050.00317.92
8.2.60.0030.00617.91
8.2.50.0080.00018.10
8.2.40.0030.00619.34
8.2.30.0050.00218.18
8.2.20.0000.00717.60
8.2.10.0000.00717.85
8.2.00.0070.00017.84
8.1.280.0120.00625.92
8.1.270.0030.00622.10
8.1.260.0070.00026.35
8.1.250.0000.00728.09
8.1.240.0040.00719.01
8.1.230.0070.00420.89
8.1.220.0030.00517.74
8.1.210.0040.00420.14
8.1.200.0030.00617.23
8.1.190.0040.00417.10
8.1.180.0000.00718.10
8.1.170.0030.00618.66
8.1.160.0050.00322.02
8.1.150.0040.00418.51
8.1.140.0070.00017.33
8.1.130.0030.00317.68
8.1.120.0000.00717.37
8.1.110.0040.00417.33
8.1.100.0040.00417.20
8.1.90.0040.00417.34
8.1.80.0040.00417.29
8.1.70.0000.00717.34
8.1.60.0030.00517.46
8.1.50.0030.00617.39
8.1.40.0040.00417.27
8.1.30.0040.00417.48
8.1.20.0030.00617.40
8.1.10.0040.00417.40
8.1.00.0040.00417.34
8.0.300.0000.00720.16
8.0.290.0040.00416.63
8.0.280.0050.00318.32
8.0.270.0070.00017.13
8.0.260.0040.00417.04
8.0.250.0030.00316.88
8.0.240.0030.00316.89
8.0.230.0080.00016.93
8.0.220.0030.00316.86
8.0.210.0040.00416.80
8.0.200.0030.00316.77
8.0.190.0030.00316.80
8.0.180.0040.00416.74
8.0.170.0060.00316.69
8.0.160.0000.00716.79
8.0.150.0020.00516.82
8.0.140.0060.00316.78
8.0.130.0030.00313.27
8.0.120.0000.00916.90
8.0.110.0030.00616.85
8.0.100.0000.00916.98
8.0.90.0000.01116.87
8.0.80.0120.00916.95
8.0.70.0030.00716.81
8.0.60.0030.00616.81
8.0.50.0000.00916.81
8.0.30.0140.00917.14
8.0.20.0110.01117.40
8.0.10.0040.00417.12
8.0.00.0100.01016.85
7.4.330.0030.00315.03
7.4.320.0030.00316.28
7.4.300.0040.00416.37
7.4.290.0000.00816.36
7.4.280.0000.00716.25
7.4.270.0070.00016.38
7.4.260.0000.00716.27
7.4.250.0000.00916.50
7.4.240.0000.00916.60
7.4.230.0030.00616.52
7.4.220.0060.01916.55
7.4.210.0070.01116.71
7.4.200.0050.00516.54
7.4.160.0000.01816.57
7.4.150.0090.01217.40
7.4.140.0110.01417.86
7.4.130.0100.01216.44
7.4.120.0140.01216.52
7.4.110.0040.01616.51
7.4.100.0140.01316.77
7.4.90.0090.01216.54
7.4.80.0100.01019.39
7.4.70.0100.01316.62
7.4.60.0100.01016.72
7.4.50.0000.01116.76
7.4.40.0110.00816.50
7.4.30.0040.01816.58
7.4.00.0070.01015.15
7.3.330.0030.00313.13
7.3.320.0000.00713.18
7.3.310.0030.00616.24
7.3.300.0000.00816.30
7.3.290.0090.01016.31
7.3.280.0090.01016.34
7.3.270.0150.00917.40
7.3.260.0100.01416.54
7.3.250.0130.00816.42
7.3.240.0100.01016.42
7.3.230.0090.01216.67
7.3.210.0120.00616.45
7.3.200.0000.02116.63
7.3.190.0080.01116.50
7.3.180.0120.01216.27
7.3.170.0100.01016.36
7.3.160.0070.01316.62
7.3.10.0140.00716.05
7.3.00.0140.01016.49
7.2.330.0060.01516.50
7.2.320.0100.00916.75
7.2.310.0070.01316.43
7.2.300.0040.01416.31
7.2.290.0060.01416.64
7.2.130.0060.01216.33
7.2.120.0200.00016.29
7.2.110.0100.01016.01
7.2.100.0070.01416.39
7.2.90.0110.00716.08
7.2.80.0080.00816.30
7.2.70.0040.01816.24
7.2.60.0100.01416.79
7.2.50.0180.01316.51
7.2.40.0040.01216.46
7.2.30.0180.01416.68
7.2.20.0130.01716.55
7.2.10.0120.01516.45
7.2.00.0110.01318.26
7.1.250.0100.01415.26
7.1.200.0090.00315.91
7.1.100.0030.01017.98
7.1.70.0060.00917.19
7.1.60.0110.01819.86
7.1.50.0070.01117.11
7.1.00.0070.07322.63
7.0.200.0350.00614.45
7.0.60.0070.06719.98
7.0.50.0070.08017.99
7.0.40.0000.06020.16
7.0.30.0570.07020.52
7.0.20.0130.05020.41
7.0.10.0400.07020.41
7.0.00.0070.06020.30
5.6.280.0130.06721.31
5.6.210.0130.08020.72
5.6.200.0100.06318.30
5.6.190.0100.08320.54
5.6.180.3330.04720.48
5.6.170.0270.08020.60
5.6.160.0000.09020.64
5.6.150.0100.08318.26
5.6.140.0000.05318.30
5.6.130.0130.08018.36
5.6.120.0070.05321.15
5.6.110.0100.07321.14
5.6.100.0030.06021.18
5.6.90.0100.06721.25
5.6.80.0170.07020.55
5.6.70.3700.04020.42
5.5.350.0200.03720.39
5.5.340.0100.08318.21
5.5.330.0030.04720.38
5.5.320.0370.07720.39
5.5.310.0230.04020.52
5.5.300.0070.08318.20
5.5.290.0130.05318.20
5.5.280.0100.04321.16
5.5.270.0070.06321.12
5.5.260.0100.08320.99
5.5.250.0100.08720.85
5.5.240.0070.04320.38
5.4.450.0170.05319.77
5.4.440.0230.05019.63
5.4.430.0230.04719.32
5.4.420.0230.06319.44
5.4.410.0200.04719.16
5.4.400.0130.04319.36
5.4.390.0200.04019.08
5.4.380.0170.05019.35
5.4.370.0200.04719.35
5.4.360.0200.06019.25
5.4.350.0170.04319.32
5.4.340.0170.04319.32
5.4.320.0170.04319.27
5.4.310.0200.04319.44
5.4.300.0170.04319.35
5.4.290.0230.03319.45
5.4.280.0130.04319.46
5.4.270.0170.04319.27
5.4.260.0230.04719.27
5.4.250.0300.03019.07
5.4.240.0200.03719.43
5.4.230.0270.03319.36
5.4.220.0200.04318.96
5.4.210.0170.04019.25
5.4.200.0170.04019.07
5.4.190.0270.05719.27
5.4.180.0230.05719.28
5.4.170.0230.03319.24
5.4.160.0230.08019.09
5.4.150.0170.05019.38
5.4.140.0200.03316.43
5.4.130.0170.04016.69
5.4.120.0170.05016.55
5.4.110.0200.03716.68
5.4.100.0370.03716.73
5.4.90.0170.06716.58
5.4.80.0370.06716.64
5.4.70.0300.04316.57
5.4.60.0270.04316.45
5.4.50.0230.05716.67
5.4.40.0470.06016.56
5.4.30.0200.04316.63
5.4.20.0170.05316.25
5.4.10.0430.06316.64
5.4.00.0130.04716.05
5.3.290.0230.05014.90
5.3.280.0270.03714.73
5.3.270.0130.04314.67
5.3.260.0430.07014.74
5.3.250.0230.04014.66
5.3.240.0270.05314.65
5.3.230.0400.07014.64
5.3.220.0100.05314.80
5.3.210.0130.07014.58
5.3.200.0570.06314.85
5.3.190.0230.04714.63
5.3.180.0170.04314.61
5.3.170.0100.04314.79
5.3.160.0400.07314.76
5.3.150.0530.06714.79
5.3.140.0500.07014.68
5.3.130.0500.06314.56
5.3.120.0270.04314.75
5.3.110.0470.07714.67
5.3.100.0270.04714.32
5.3.90.0370.05014.04
5.3.80.0370.04014.22
5.3.70.0500.03014.05
5.3.60.0200.03714.09
5.3.50.0430.07714.15
5.3.40.0270.06714.18
5.3.30.0270.06313.93
5.3.20.0300.07313.74
5.3.10.0370.06313.89
5.3.00.0170.04013.75
5.2.170.0170.03311.16
5.2.160.0200.02711.21
5.2.150.0230.05011.23
5.2.140.0230.06011.21
5.2.130.0170.04711.30
5.2.120.0200.03711.22
5.2.110.0170.05711.14
5.2.100.0230.05311.11
5.2.90.0270.05711.22
5.2.80.0230.03711.15
5.2.70.0170.05011.11
5.2.60.0230.03311.07
5.2.50.0170.03011.07
5.2.40.0100.03311.19
5.2.30.0130.03011.23
5.2.20.0230.03011.22
5.2.10.0130.06310.95
5.2.00.0230.05310.88
5.1.60.0270.04010.34
5.1.50.0170.04310.25
5.1.40.0200.02310.28
5.1.30.0200.05710.42
5.1.20.0330.03010.50
5.1.10.0130.02710.30
5.1.00.0130.03710.22
5.0.50.0300.0209.20
5.0.40.0300.0209.20
5.0.30.0070.0339.20
5.0.20.0100.0239.20
5.0.10.0100.0179.20
5.0.00.0070.0639.20
4.4.90.0130.0309.20
4.4.80.0330.0209.20
4.4.70.0070.0339.20
4.4.60.0100.0279.20
4.4.50.0330.0239.20
4.4.40.0100.0379.20
4.4.30.0070.0239.20
4.4.20.0070.0379.20
4.4.10.0070.0279.20
4.4.00.0130.0239.20
4.3.110.0130.0209.20
4.3.100.0030.0179.20
4.3.90.0070.0179.20
4.3.80.0030.0279.20
4.3.70.0030.0209.20
4.3.60.0030.0179.20
4.3.50.0030.0179.20
4.3.40.0100.0239.20
4.3.30.0030.0209.20
4.3.20.0030.0409.20
4.3.10.0030.0179.20
4.3.00.0100.0109.20

preferences:
36.8 ms | 404 KiB | 6 Q