3v4l.org

run code in 300+ PHP versions simultaneously
<?php $utf8_str = "abcd \xef efgh"; echo iconv_substr( $utf8_str , 0 , 8 , 'UTF-8' ); ?>

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)
8.3.60.0090.00618.31
8.3.50.0110.00822.04
8.3.40.0110.00318.89
8.3.30.0080.00818.70
8.3.20.0040.00418.73
8.3.10.0050.00320.36
8.3.00.0040.00419.04
8.2.180.0100.01016.88
8.2.170.0120.00322.96
8.2.160.0000.01722.09
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0000.00726.16
8.2.120.0080.00019.95
8.2.110.0030.00722.30
8.2.100.0040.00717.91
8.2.90.0050.00319.23
8.2.80.0060.00317.97
8.2.70.0060.00317.75
8.2.60.0050.00317.88
8.2.50.0040.00418.07
8.2.40.0080.00018.34
8.2.30.0040.00419.73
8.2.20.0040.00417.66
8.2.10.0000.00717.56
8.2.00.0040.00417.62
8.1.280.0070.00725.92
8.1.270.0040.00423.99
8.1.260.0070.00726.35
8.1.250.0000.00928.09
8.1.240.0100.00019.28
8.1.230.0080.00417.45
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0030.00617.23
8.1.190.0000.00917.10
8.1.180.0040.00418.10
8.1.170.0050.00318.70
8.1.160.0040.00418.73
8.1.150.0030.00518.69
8.1.140.0070.00017.35
8.1.130.0050.00217.74
8.1.120.0030.00417.31
8.1.110.0000.00817.36
8.1.100.0050.00317.29
8.1.90.0040.00417.32
8.1.80.0070.00017.42
8.1.70.0030.00317.35
8.1.60.0050.00317.54
8.1.50.0000.00817.31
8.1.40.0030.00517.46
8.1.30.0050.00317.50
8.1.20.0060.00317.50
8.1.10.0030.00617.52
8.1.00.0030.00517.30
8.0.300.0050.00218.77
8.0.290.0000.00816.75
8.0.280.0040.00418.36
8.0.270.0000.00717.25
8.0.260.0030.00320.55
8.0.250.0000.00717.07
8.0.240.0040.00416.84
8.0.230.0040.00416.81
8.0.220.0000.00816.88
8.0.210.0040.00416.77
8.0.200.0070.00016.84
8.0.190.0040.00417.02
8.0.180.0000.00916.88
8.0.170.0040.00416.77
8.0.160.0070.00016.95
8.0.150.0030.00616.88
8.0.140.0040.00416.76
8.0.130.0030.00313.33
8.0.120.0040.00416.99
8.0.110.0000.00816.93
8.0.100.0030.00616.91
8.0.90.0030.00617.09
8.0.80.0030.01317.09
8.0.70.0000.00816.92
8.0.60.0000.00916.98
8.0.50.0030.00616.91
8.0.30.0040.01717.40
8.0.20.0100.01217.40
8.0.10.0030.00617.16
8.0.00.0100.01316.81
7.4.330.0000.00614.59
7.4.320.0000.00616.58
7.4.300.0060.00016.35
7.4.290.0000.00716.35
7.4.280.0000.00816.54
7.4.270.0000.00716.58
7.4.260.0060.00013.25
7.4.250.0030.00616.59
7.4.240.0030.00516.69
7.4.230.0030.00616.70
7.4.220.0100.01816.59
7.4.210.0080.01016.67
7.4.200.0000.00816.71
7.4.190.0000.00816.67
7.4.160.0070.01016.60
7.4.150.0070.01817.40
7.4.140.0140.00817.86
7.4.130.0100.00816.55
7.4.120.0110.00816.48
7.4.110.0100.01016.43
7.4.100.0070.01816.45
7.4.90.0070.01116.60
7.4.80.0060.01219.04
7.4.70.0160.00316.71
7.4.60.0000.01916.52
7.4.50.0000.01116.61
7.4.40.0060.01222.27
7.4.30.0040.01416.56
7.4.00.0030.01214.68
7.3.330.0050.00013.09
7.3.320.0060.00012.98
7.3.310.0030.00616.40
7.3.300.0040.00416.27
7.3.290.0100.00716.39
7.3.280.0090.00916.34
7.3.270.0160.00317.40
7.3.260.0100.01518.24
7.3.250.0140.00816.51
7.3.240.0160.01016.53
7.3.230.0030.01516.44
7.3.210.0100.01316.45
7.3.200.0100.01319.39
7.3.190.0140.00416.64
7.3.180.0060.01816.39
7.3.170.0100.01016.52
7.3.160.0070.01116.33
7.3.120.0040.01214.87
7.2.330.0130.00716.75
7.2.320.0130.00616.55
7.2.310.0140.00716.83
7.2.300.0110.00716.68
7.2.290.0070.01716.68
7.2.60.0030.01416.70
7.2.00.0060.01019.23
7.1.200.0100.00315.63
7.1.100.0000.01217.81
7.1.70.0000.00817.28
7.1.60.0100.01019.40
7.1.50.0070.01117.00
7.1.00.0070.05022.55
7.0.200.0060.00316.77
7.0.140.0030.06322.30
7.0.60.0100.03319.77
7.0.50.0070.04317.95
7.0.40.0070.04320.46
7.0.30.0430.06320.38
7.0.20.0200.04720.28
7.0.10.0100.08320.32
7.0.00.0070.06020.36
5.6.280.0100.07020.96
5.6.210.0100.08020.52
5.6.200.0070.05718.27
5.6.190.0000.04720.48
5.6.180.0470.07020.43
5.6.170.0230.05020.63
5.6.160.0070.09020.69
5.6.150.0170.07018.36
5.6.140.0070.08718.34
5.6.130.0130.07718.26
5.6.120.0030.09021.22
5.6.110.0170.07321.25
5.6.100.0200.07321.10
5.6.90.0030.07721.12
5.6.80.0200.07020.49
5.5.350.0030.08020.32
5.5.340.0130.08018.03
5.5.330.0030.04320.53
5.5.320.3530.04020.33
5.5.310.0270.07320.43
5.5.300.0070.03718.04
5.5.290.0100.05718.06
5.5.280.0030.09320.77
5.5.270.0000.10020.89
5.5.260.0130.08020.78
5.5.250.0070.03720.79
5.5.240.0070.05320.44
5.4.450.0100.04319.58
5.4.440.0070.06319.63
5.4.430.0070.07319.58
5.4.420.0130.07319.45
5.4.410.0130.04719.43
5.4.400.0070.03719.25
5.4.390.0070.07319.24
5.4.380.0070.04019.34
5.4.370.0130.04319.31
5.4.360.0030.08019.24
5.4.350.0170.03719.28
5.4.340.0130.07319.27
5.4.320.0030.04019.28
5.4.310.0100.07319.28
5.4.300.0070.06319.34
5.4.290.0130.03319.07
5.4.280.0170.04719.28
5.4.270.0070.05019.31
5.4.260.0030.04318.97
5.4.250.0000.06318.94
5.4.240.0070.08319.23
5.4.230.0100.07719.24
5.4.220.0000.04319.29
5.4.210.0070.03718.94
5.4.200.0070.07319.07
5.4.190.0100.04319.06
5.4.180.0000.04318.94
5.4.170.0100.03319.15
5.4.160.0130.06719.30
5.4.150.0030.04019.22
5.4.140.0100.03316.69
5.4.130.0030.07016.49
5.4.120.0100.05316.64
5.4.110.0070.07016.64
5.4.100.0100.04716.57
5.4.90.0070.07016.46
5.4.80.0030.07716.44
5.4.70.0000.04016.47
5.4.60.0070.06016.60
5.4.50.0070.05016.45
5.4.40.0130.07016.42
5.4.30.0200.02716.46
5.4.20.0070.07016.50
5.4.10.0130.03016.42
5.4.00.0030.04015.98
5.3.290.0000.05014.76
5.3.280.0030.06314.70
5.3.270.0070.03714.58
5.3.260.0070.06314.55
5.3.250.0100.04314.66
5.3.240.0030.07714.74
5.3.230.0030.08014.68
5.3.220.0070.04314.51
5.3.210.0100.06014.64
5.3.200.0070.04314.81
5.3.190.0170.06314.54
5.3.180.0130.06714.64
5.3.170.0100.05714.66
5.3.160.0130.07014.61
5.3.150.0070.03714.62
5.3.140.0070.07314.64
5.3.130.0070.04014.72
5.3.120.0030.05314.79
5.3.110.0070.08314.63
5.3.100.0030.07014.02
5.3.90.0000.04714.14
5.3.80.0100.06314.11
5.3.70.0030.07714.10
5.3.60.0000.06014.12
5.3.50.0070.08014.03
5.3.40.0030.04314.06
5.3.30.0100.04714.00
5.3.20.0070.04013.66
5.3.10.0170.05713.63
5.3.00.0070.04313.74
5.2.170.0030.03311.22
5.2.160.0070.03011.22
5.2.150.0000.03311.28
5.2.140.0000.05311.15
5.2.130.0000.04011.22
5.2.120.0100.03011.08
5.2.110.0030.03711.25
5.2.100.0030.04011.25
5.2.90.0000.05311.10
5.2.80.0070.04311.17
5.2.70.0030.04011.17
5.2.60.0070.05311.18
5.2.50.0100.06011.02
5.2.40.0030.05711.12
5.2.30.0000.06711.04
5.2.20.0070.06311.09
5.2.10.0030.03010.89
5.2.00.0030.03010.89
5.1.60.0070.02010.18
5.1.50.0000.04010.29
5.1.40.0100.02710.10
5.1.30.0030.03310.48
5.1.20.0030.02710.57
5.1.10.0000.03310.18
5.1.00.0000.02710.20
5.0.50.0030.0308.68
5.0.40.0000.0308.57
5.0.30.0000.0738.22
5.0.20.0000.0408.36
5.0.10.0070.0238.38
5.0.00.0030.0338.21
4.4.90.0070.0307.89
4.4.80.0030.0207.89
4.4.70.0000.0377.89
4.4.60.0000.0337.89
4.4.50.0030.0137.89
4.4.40.0030.0407.89
4.4.30.0000.0407.89
4.4.20.0030.0377.89
4.4.10.0000.0177.89
4.4.00.0030.0307.89
4.3.110.0030.0237.89
4.3.100.0030.0277.89
4.3.90.0030.0377.89
4.3.80.0000.0307.89
4.3.70.0100.0137.89
4.3.60.0000.0207.89
4.3.50.0100.0237.89
4.3.40.0000.0477.89
4.3.30.0000.0337.89
4.3.20.0000.0337.89
4.3.10.0000.0307.89
4.3.00.0000.0307.89

preferences:
44.73 ms | 401 KiB | 5 Q