3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo mb_substr('РФ', -2, '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)
8.3.60.0030.01718.30
8.3.50.0090.00921.93
8.3.40.0180.00318.79
8.3.30.0030.01018.96
8.3.20.0020.00520.21
8.3.10.0080.00021.96
8.3.00.0040.00422.39
8.2.180.0180.00016.75
8.2.170.0110.00422.96
8.2.160.0070.00720.52
8.2.150.0050.00324.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0050.00317.50
8.2.110.0000.00922.21
8.2.100.0090.00319.45
8.2.90.0000.00719.09
8.2.80.0040.00417.97
8.2.70.0050.00317.63
8.2.60.0060.00317.93
8.2.50.0000.00818.07
8.2.40.0050.00318.04
8.2.30.0060.00317.98
8.2.20.0040.00417.64
8.2.10.0000.00819.53
8.2.00.0040.00417.58
8.1.280.0070.00725.92
8.1.270.0030.00521.99
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0030.00623.91
8.1.230.0070.00419.10
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0030.00617.13
8.1.190.0000.00717.54
8.1.180.0060.00618.10
8.1.170.0080.00018.51
8.1.160.0040.00421.95
8.1.150.0020.00518.56
8.1.140.0050.00217.31
8.1.130.0070.00017.71
8.1.120.0030.00417.39
8.1.110.0000.00817.34
8.1.100.0000.00717.20
8.1.90.0080.00017.32
8.1.80.0000.00717.24
8.1.70.0070.00017.25
8.1.60.0040.00417.50
8.1.50.0070.00017.45
8.1.40.0060.00317.33
8.1.30.0000.00717.58
8.1.20.0050.00317.47
8.1.10.0050.00217.54
8.1.00.0000.00717.41
8.0.300.0000.00718.77
8.0.290.0070.00017.05
8.0.280.0030.00318.30
8.0.270.0070.00017.24
8.0.260.0030.00316.80
8.0.250.0060.00016.93
8.0.240.0030.00316.90
8.0.230.0000.00716.82
8.0.220.0030.00316.79
8.0.210.0000.00716.77
8.0.200.0060.00016.93
8.0.190.0030.00316.95
8.0.180.0040.00416.91
8.0.170.0040.00416.88
8.0.160.0000.00716.99
8.0.150.0040.00416.78
8.0.140.0000.00716.86
8.0.130.0030.00313.36
8.0.120.0040.00416.79
8.0.110.0080.00016.74
8.0.100.0050.00216.76
8.0.90.0000.00716.78
8.0.80.0090.00616.81
8.0.70.0000.00816.89
8.0.60.0000.00716.86
8.0.50.0080.00016.75
8.0.30.0070.01617.08
8.0.20.0080.01017.40
8.0.10.0040.00416.74
8.0.00.0130.00616.81
7.4.330.0000.00515.00
7.4.320.0060.00016.36
7.4.300.0000.00716.48
7.4.290.0000.00716.35
7.4.280.0060.00316.50
7.4.270.0060.00016.32
7.4.260.0030.00316.46
7.4.250.0040.00416.46
7.4.240.0050.00216.42
7.4.230.0040.00416.53
7.4.220.0100.00716.55
7.4.210.0070.01116.47
7.4.200.0070.00016.25
7.4.190.0030.00316.53
7.4.160.0070.01016.56
7.4.150.0100.00717.40
7.4.140.0070.01317.86
7.4.130.0090.01016.35
7.4.120.0070.01116.38
7.4.110.0100.00616.41
7.4.100.0070.01016.38
7.4.90.0030.01416.41
7.4.80.0090.00919.39
7.4.70.0110.00916.21
7.4.60.0090.00616.18
7.4.50.0040.00716.46
7.4.40.0060.01322.77
7.4.30.0030.01316.23
7.4.00.0050.00814.82
7.3.330.0020.00212.90
7.3.320.0050.00013.12
7.3.310.0030.00316.18
7.3.300.0000.00716.17
7.3.290.0070.00716.17
7.3.280.0100.00816.16
7.3.270.0080.00817.40
7.3.260.0100.00716.25
7.3.250.0050.01216.33
7.3.240.0110.00616.46
7.3.230.0150.00716.39
7.3.210.0120.00316.29
7.3.200.0060.00919.39
7.3.190.0130.01016.45
7.3.180.0030.01216.47
7.3.170.0100.00716.29
7.3.160.0140.00416.22
7.3.120.0150.00014.45
7.2.330.0160.00016.43
7.2.320.0110.01416.48
7.2.310.0060.00916.61
7.2.300.0070.01116.68
7.2.290.0070.01016.16
7.2.110.0500.00916.45
7.2.80.0030.01016.33
7.2.60.0070.00716.80
7.2.00.0030.01019.37
7.1.200.0060.00615.84
7.1.100.0100.00318.13
7.1.70.0000.00916.97
7.1.60.0130.01019.82
7.1.50.0070.01416.77
7.1.00.0000.08022.51
7.0.200.0070.00016.75
7.0.140.0030.07321.95
7.0.100.0230.07019.98
7.0.90.0230.08019.88
7.0.80.0300.09019.91
7.0.70.0030.05319.88
7.0.60.0100.07719.91
7.0.50.0230.09020.14
7.0.40.0030.05020.04
7.0.30.0100.08020.07
7.0.20.0100.07720.08
7.0.10.0100.07720.10
7.0.00.0070.04020.04
5.6.280.0070.07021.01
5.6.250.0100.08020.58
5.6.240.0130.08020.50
5.6.230.0030.06320.66
5.6.220.0130.07320.61
5.6.210.0170.07020.76
5.6.200.0130.08321.14
5.6.190.0100.04021.00
5.6.180.0100.03721.13
5.6.170.0100.07021.04
5.6.160.0070.09021.02
5.6.150.0030.08720.95
5.6.140.0000.06021.07
5.6.130.0100.06721.15
5.6.120.0170.08021.00
5.6.110.0170.07721.03
5.6.100.0130.08321.00
5.6.90.0030.04321.00
5.6.80.0070.08020.46
5.6.70.0100.03720.38
5.6.60.0030.07320.53
5.6.50.0070.07320.41
5.6.40.0030.07020.43
5.6.30.0100.07320.39
5.6.20.0070.07720.35
5.6.10.0030.07020.36
5.6.00.0100.07720.41
5.5.380.0000.08720.44
5.5.370.0100.06320.35
5.5.360.0070.08320.32
5.5.350.0030.04720.41
5.5.340.0230.06320.64
5.5.330.0100.08020.77
5.5.320.0100.07020.79
5.5.310.0170.08020.89
5.5.300.0100.06720.79
5.5.290.0000.07320.85
5.5.280.0170.04020.82
5.5.270.0100.08020.74
5.5.260.0030.07020.84
5.5.250.0070.08020.72
5.5.240.0100.06020.13
5.5.230.0170.04320.27
5.5.220.0000.08720.20
5.5.210.0130.04020.28
5.5.200.0100.06320.11
5.5.190.0130.06320.25
5.5.180.0100.04319.98
5.5.160.0270.06020.14
5.5.150.0000.08320.17
5.5.140.0030.07320.14
5.5.130.0100.05720.12
5.5.120.0030.08720.26
5.5.110.0100.07320.22
5.5.100.0100.03720.04
5.5.90.0100.07720.00
5.5.80.0000.08720.06
5.5.70.0030.07320.03
5.5.60.0030.04020.10
5.5.50.0170.03320.14
5.5.40.0070.04320.14
5.5.30.0030.04320.06
5.5.20.0070.03720.04
5.5.10.0070.03720.07
5.5.00.0030.04019.91
5.4.450.0100.04319.30
5.4.440.0130.07719.39
5.4.430.0030.07019.34
5.4.420.0000.07319.22
5.4.410.0000.07719.27
5.4.400.0100.07018.95
5.4.390.0100.04019.07
5.4.380.0100.08319.03
5.4.370.0100.07319.06
5.4.360.0070.07718.79
5.4.350.0100.06319.10
5.4.340.0070.07319.13
5.4.320.0070.07019.23
5.4.310.0130.06719.10
5.4.300.0070.06019.23
5.4.290.0070.04319.09
5.4.280.0130.07019.11
5.4.270.0100.05719.07
5.4.260.0130.06718.90
5.4.250.0200.04319.04
5.4.240.0130.07019.14
5.4.230.0070.04319.22
5.4.220.0030.04018.93
5.4.210.0000.04018.89
5.4.200.0000.04019.04
5.4.190.0070.04318.93
5.4.180.0070.03319.06
5.4.170.0030.03718.96
5.4.160.0030.03718.76
5.4.150.0070.03719.03
5.4.140.0030.03716.30
5.4.130.0000.03716.21
5.4.120.0030.03316.31
5.4.110.0030.03716.33
5.4.100.0100.03016.36
5.4.90.0030.03716.20
5.4.80.0000.06316.41
5.4.70.0070.03316.40
5.4.60.0000.04316.36
5.4.50.0030.03716.40
5.4.40.0030.03716.45
5.4.30.0070.03016.41
5.4.20.0030.03316.24
5.4.10.0030.03316.18
5.4.00.0000.04015.71
5.3.290.0070.07314.51
5.3.280.0070.04314.42
5.3.270.0000.04314.44
5.3.260.0070.03314.51
5.3.250.0030.03714.48
5.3.240.0100.03014.46
5.3.230.0100.03714.55
5.3.220.0030.03714.51
5.3.210.0030.04014.39
5.3.200.0000.04014.55
5.3.190.0030.04314.47
5.3.180.0030.03314.39
5.3.170.0100.05014.53
5.3.160.0100.03014.56
5.3.150.0030.03314.38
5.3.140.0070.03314.50
5.3.130.0070.03314.54
5.3.120.0000.04014.55
5.3.110.0070.03314.54
5.3.100.0000.04014.04
5.3.90.0000.04013.87
5.3.80.0070.03313.96
5.3.70.0070.03313.77
5.3.60.0030.03713.99
5.3.50.0000.03713.79
5.3.40.0030.03713.79
5.3.30.0130.02313.88
5.3.20.0070.03313.67
5.3.10.0030.03713.61
5.3.00.0030.03313.49
5.2.170.0000.03312.12
5.2.160.0000.03012.12
5.2.150.0000.03012.12
5.2.140.0030.03012.12
5.2.130.0000.03312.12
5.2.120.0000.03312.12
5.2.110.0030.02712.12
5.2.100.0000.02712.12
5.2.90.0030.02712.12
5.2.80.0070.02712.12
5.2.70.0000.03012.12
5.2.60.0070.02312.12
5.2.50.0000.04312.12
5.2.40.0000.03012.12
5.2.30.0000.03312.12
5.2.20.0000.02712.12
5.2.10.0000.03012.12
5.2.00.0070.02312.12
5.1.60.0000.02312.12
5.1.50.0030.02312.12
5.1.40.0030.02012.12
5.1.30.0000.02712.12
5.1.20.0000.02712.12
5.1.10.0000.02712.12
5.1.00.0030.02312.12
5.0.50.0000.02312.12
5.0.40.0000.04312.12
5.0.30.0100.04712.12
5.0.20.0030.02012.12
5.0.10.0070.03012.12
5.0.00.0030.05712.12
4.4.90.0070.01012.12
4.4.80.0000.01712.12
4.4.70.0000.01712.12
4.4.60.0000.01712.12
4.4.50.0030.01312.12
4.4.40.0000.02012.12
4.4.30.0030.01012.12
4.4.20.0000.01712.12
4.4.10.0000.01312.12
4.4.00.0170.04012.12
4.3.110.0030.03312.12
4.3.100.0000.01712.12
4.3.90.0070.03312.12
4.3.80.0030.03712.12
4.3.70.0000.03712.12
4.3.60.0030.02312.12
4.3.50.0030.01712.12
4.3.40.0000.03712.12
4.3.30.0000.03312.12
4.3.20.0000.02012.12
4.3.10.0000.02312.12
4.3.00.0030.03312.12

preferences:
47.02 ms | 401 KiB | 5 Q