3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo mb_substr("45槑sd",0,1,"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)
8.3.60.0070.01018.31
8.3.50.0120.00621.90
8.3.40.0120.00318.67
8.3.30.0080.00819.00
8.3.20.0040.00420.34
8.3.10.0040.00421.77
8.3.00.0040.00419.26
8.2.180.0140.00718.04
8.2.170.0100.01022.96
8.2.160.0070.00720.39
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0050.00226.16
8.2.120.0040.00419.20
8.2.110.0100.00019.33
8.2.100.0080.00417.63
8.2.90.0050.00319.05
8.2.80.0030.00617.97
8.2.70.0090.00017.38
8.2.60.0030.00517.93
8.2.50.0000.00818.07
8.2.40.0040.00419.82
8.2.30.0040.00417.91
8.2.20.0080.00017.49
8.2.10.0060.00318.00
8.2.00.0030.00517.54
8.1.280.0070.00725.92
8.1.270.0060.00320.70
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0060.00323.84
8.1.230.0040.00717.42
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0040.00817.23
8.1.190.0060.00317.13
8.1.180.0000.00818.10
8.1.170.0000.00918.59
8.1.160.0040.00421.99
8.1.150.0000.00718.76
8.1.140.0030.00517.26
8.1.130.0070.00017.77
8.1.120.0040.00417.31
8.1.110.0070.00017.19
8.1.100.0030.00417.32
8.1.90.0030.00317.22
8.1.80.0040.00417.36
8.1.70.0040.00417.31
8.1.60.0000.00817.44
8.1.50.0030.00517.46
8.1.40.0030.00717.53
8.1.30.0050.00317.59
8.1.20.0040.00417.55
8.1.10.0000.00817.31
8.1.00.0020.00517.34
8.0.300.0040.00418.77
8.0.290.0070.00016.63
8.0.280.0030.00318.48
8.0.270.0030.00317.22
8.0.260.0060.00017.25
8.0.250.0070.00016.87
8.0.240.0050.00617.01
8.0.230.0000.00716.91
8.0.220.0030.00316.84
8.0.210.0000.00616.81
8.0.200.0040.00416.87
8.0.190.0040.00416.82
8.0.180.0040.00416.91
8.0.170.0040.00416.87
8.0.160.0030.00316.86
8.0.150.0000.00716.73
8.0.140.0030.00316.69
8.0.130.0030.00313.29
8.0.120.0040.00416.77
8.0.110.0050.00316.67
8.0.100.0070.00016.86
8.0.90.0040.00416.78
8.0.80.0090.00616.78
8.0.70.0070.00016.68
8.0.60.0000.00716.84
8.0.50.0000.00716.77
8.0.30.0130.00917.07
8.0.20.0120.00717.40
8.0.10.0040.00316.69
8.0.00.0130.00616.71
7.4.330.0000.00515.07
7.4.320.0030.00316.38
7.4.300.0000.00616.45
7.4.290.0060.00316.30
7.4.280.0000.00816.30
7.4.270.0030.00316.23
7.4.260.0000.00716.50
7.4.250.0070.00016.29
7.4.240.0020.00516.45
7.4.230.0000.00716.23
7.4.220.0070.01116.33
7.4.210.0110.00316.58
7.4.200.0030.00316.49
7.4.160.0170.00316.49
7.4.150.0090.00917.40
7.4.140.0100.00717.86
7.4.130.0070.01016.36
7.4.120.0080.00816.26
7.4.110.0130.01016.49
7.4.100.0060.01616.55
7.4.90.0140.00716.60
7.4.80.0100.01019.39
7.4.70.0100.00716.35
7.4.60.0000.01616.44
7.4.50.0040.00416.27
7.4.40.0120.00616.39
7.4.30.0110.00516.40
7.4.00.0030.00914.61
7.3.330.0030.00313.12
7.3.320.0120.00212.97
7.3.310.0000.00616.21
7.3.300.0000.00616.04
7.3.290.0070.00816.09
7.3.280.0120.00716.11
7.3.270.0070.01017.40
7.3.260.0130.00316.36
7.3.250.0110.00616.22
7.3.240.0140.00816.10
7.3.230.0120.00916.39
7.3.210.0130.01016.44
7.3.200.0100.00719.39
7.3.190.0120.00916.34
7.3.180.0060.00916.39
7.3.170.0100.00716.27
7.3.160.0090.00616.14
7.3.120.0030.01014.83
7.3.110.0040.01214.34
7.3.100.0030.01314.72
7.3.90.0000.01214.52
7.3.80.0030.00914.75
7.3.70.0060.00914.58
7.3.60.0050.00514.73
7.3.50.0100.00614.40
7.3.40.0030.00914.59
7.3.30.0000.01014.79
7.3.20.0060.00616.71
7.3.10.0040.01116.45
7.3.00.0090.00616.40
7.2.330.0040.01816.23
7.2.320.0080.00816.43
7.2.310.0100.01016.30
7.2.300.0120.00616.42
7.2.290.0000.01716.50
7.2.240.0000.01414.95
7.2.230.0060.00914.91
7.2.220.0000.00914.68
7.2.210.0030.01315.05
7.2.200.0090.00314.91
7.2.190.0090.00614.57
7.2.180.0050.00514.85
7.2.170.0120.00314.93
7.2.160.0140.00414.81
7.2.150.0080.00816.96
7.2.140.0040.00716.64
7.2.130.0060.00616.76
7.2.120.0080.00817.01
7.2.110.0070.00716.83
7.2.100.0040.01516.82
7.2.90.0100.00716.81
7.2.80.0040.00716.85
7.2.70.0100.00716.96
7.2.60.0080.00416.89
7.2.50.0070.00716.90
7.2.40.0120.00316.61
7.2.30.0000.00916.99
7.2.20.0070.01016.60
7.2.10.0120.00416.77
7.2.00.0070.00917.78
7.1.330.0110.00415.33
7.1.320.0120.00315.71
7.1.310.0030.00815.49
7.1.300.0090.00315.77
7.1.290.0110.00015.65
7.1.280.0060.01015.52
7.1.270.0030.01015.83
7.1.260.0100.00315.42
7.1.250.0000.01415.79
7.1.100.0000.01217.89
7.1.70.0000.00916.71
7.1.60.0070.01719.50
7.1.50.0100.01016.84
7.1.00.0070.07322.54
7.0.200.0040.00416.64
7.0.140.0130.06722.05
7.0.60.0070.07320.01
7.0.50.0100.08017.77
7.0.40.0030.04720.04
7.0.30.0330.07320.00
7.0.20.0500.04720.06
7.0.10.0230.05720.12
7.0.00.0100.05720.09
5.6.280.0000.07021.01
5.6.210.0170.07720.64
5.6.200.0070.06018.08
5.6.190.0100.05020.56
5.6.180.0170.04320.59
5.6.170.0330.05720.49
5.6.160.0130.07020.51
5.6.150.0000.05018.09
5.6.140.0000.08318.11
5.6.130.0030.04718.15
5.6.120.0000.04321.04
5.6.110.0200.06320.97
5.6.100.0100.05321.03
5.6.90.0030.05020.96
5.6.80.0070.08020.34
5.6.70.0300.06320.34
5.5.350.0230.04020.43
5.5.340.0030.08317.92
5.5.330.0000.04320.20
5.5.320.0030.08320.43
5.5.310.0130.04320.17
5.5.300.0030.07718.02
5.5.290.0000.06317.97
5.5.280.0000.05020.76
5.5.270.0170.04020.75
5.5.260.0070.07020.83
5.5.250.0000.04320.61
5.5.240.0100.05320.25
5.4.450.0500.06019.41
5.4.440.0330.05719.24
5.4.430.1000.06019.55
5.4.420.0970.07719.44
5.4.410.0200.04718.97
5.4.400.0530.07018.76
5.4.390.0230.06018.66
5.4.380.0400.04318.70
5.4.370.0330.05318.56
5.4.360.0230.06018.55
5.4.350.0270.06018.72
5.4.340.0300.05718.74
5.4.320.0370.06018.61
5.4.310.0430.04718.49
5.4.300.0230.06018.65
5.4.290.0430.05018.76
5.4.280.0270.06718.52
5.4.270.0270.06018.48
5.4.260.0330.05318.52
5.4.250.0330.05018.56
5.4.240.0430.06018.72
5.4.230.0400.05018.57
5.4.220.0370.05318.68
5.4.210.0400.05318.47
5.4.200.0370.05316.55
5.4.190.0400.04318.64
5.4.180.0400.04318.66
5.4.170.0330.05318.68
5.4.160.0270.05718.52
5.4.150.0230.05718.62
5.4.140.0300.04716.23
5.4.130.0230.04716.21
5.4.120.0230.05016.16
5.4.110.0300.05016.19
5.4.100.0300.05016.24
5.4.90.0330.04716.03
5.4.80.0270.06016.06
5.4.70.0570.04716.02
5.4.60.0230.06016.01
5.4.50.0500.04716.16
5.4.40.0330.04716.26
5.4.30.0430.04016.16
5.4.20.0330.05316.12
5.4.10.0470.03716.26
5.4.00.0200.05315.52
5.3.290.0330.04714.59
5.3.280.0370.05014.57
5.3.270.0270.06314.51
5.3.260.0230.05714.68
5.3.250.0370.04314.55
5.3.240.0400.04314.58
5.3.230.0270.05714.67
5.3.220.0400.04014.61
5.3.210.0300.05314.53
5.3.200.0330.04714.64
5.3.190.0300.05314.54
5.3.180.0400.04714.54
5.3.170.0270.05714.56
5.3.160.0270.06014.55
5.3.150.0330.05314.49
5.3.140.0430.06314.45
5.3.130.0300.07014.59
5.3.120.0400.05014.63
5.3.110.0270.06014.57
5.3.100.0330.04713.96
5.3.90.0270.05013.98
5.3.80.0300.05313.98
5.3.70.0330.05314.01
5.3.60.0300.06013.99
5.3.50.0330.04313.94
5.3.40.0300.05013.84
5.3.30.0300.06013.82
5.3.20.0330.05313.60
5.3.10.0300.04713.54
5.3.00.0300.04713.71
5.2.170.0230.04311.19
5.2.160.0230.04011.12
5.2.150.0230.04311.09
5.2.140.0230.04011.17
5.2.130.0200.04011.08
5.2.120.0300.03711.09
5.2.110.0200.04311.09
5.2.100.0170.04311.08
5.2.90.0230.04011.11
5.2.80.0270.03311.06
5.2.70.0200.04311.07
5.2.60.0270.04010.98
5.2.50.0370.03311.05
5.2.40.0170.04011.02
5.2.30.0200.04010.92
5.2.20.0170.04311.01
5.2.10.0170.05310.95
5.2.00.0300.05710.86
5.1.60.0170.03310.02
5.1.50.0230.03310.07
5.1.40.0230.0339.95
5.1.30.0330.04310.42
5.1.20.0300.04710.44
5.1.10.0130.03710.20
5.1.00.0230.03310.09
5.0.50.0070.0308.55
5.0.40.0200.0208.47
5.0.30.0100.0438.29
5.0.20.0170.0238.30
5.0.10.0130.0308.27
5.0.00.0100.0438.35
4.4.90.0130.0175.83
4.4.80.0170.0135.93
4.4.70.0070.0235.90
4.4.60.0030.0235.87
4.4.50.0130.0175.86
4.4.40.0100.0375.90
4.4.30.0130.0205.88
4.4.20.0130.0235.96
4.4.10.0100.0205.96
4.4.00.0000.0435.96
4.3.110.0130.0175.80
4.3.100.0070.0275.79
4.3.90.0130.0205.77
4.3.80.0100.0375.79
4.3.70.0200.0135.78
4.3.60.0130.0205.82
4.3.50.0100.0235.78
4.3.40.0170.0335.78
4.3.30.0030.0234.54
4.3.20.0000.0274.52
4.3.10.0070.0204.52
4.3.00.0100.0236.52

preferences:
54.19 ms | 401 KiB | 5 Q