3v4l.org

run code in 300+ PHP versions simultaneously
<?php # -*- coding: utf-8 -*- declare( encoding = 'UTF-8' ); header('Content-Type: text/plain;charset=utf-8'); $string = 'Doppelgänger'; print 'strlen(): ' . strlen( $string ) . "\n"; print 'mb_strlen(): ' . mb_strlen( $string, 'utf8' ) . "\n\n"; print 'substr(): ' . substr( $string, 0, 8 ) . "\n"; print 'mb_substr(): ' . mb_substr( $string, 0, 8, 'utf8' );

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)
8.3.60.0130.00718.18
8.3.50.0080.00821.21
8.3.40.0090.00618.59
8.3.30.0070.00720.34
8.3.20.0040.00420.21
8.3.10.0000.00820.98
8.3.00.0080.00022.50
8.2.180.0150.00617.00
8.2.170.0030.01022.96
8.2.160.0070.00722.29
8.2.150.0080.00024.18
8.2.140.0000.00824.66
8.2.130.0080.00026.16
8.2.120.0040.00420.98
8.2.110.0030.00619.54
8.2.100.0080.00418.09
8.2.90.0000.00719.34
8.2.80.0080.00018.05
8.2.70.0060.00317.63
8.2.60.0080.00018.05
8.2.50.0060.00318.07
8.2.40.0040.00418.28
8.2.30.0040.00419.63
8.2.20.0040.00417.80
8.2.10.0000.00717.83
8.2.00.0000.00817.71
8.1.280.0100.00725.92
8.1.270.0060.00323.99
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00322.55
8.1.230.0030.00821.15
8.1.220.0000.00918.77
8.1.210.0030.00619.21
8.1.200.0030.00617.48
8.1.190.0000.00817.65
8.1.180.0030.00518.10
8.1.170.0040.00418.77
8.1.160.0000.00718.96
8.1.150.0040.00418.82
8.1.140.0050.00317.65
8.1.130.0030.00517.95
8.1.120.0040.00417.50
8.1.110.0080.00017.49
8.1.100.0080.00017.65
8.1.90.0000.00717.48
8.1.80.0000.00717.54
8.1.70.0030.00317.53
8.1.60.0030.00617.77
8.1.50.0050.00317.65
8.1.40.0040.00417.70
8.1.30.0060.00317.71
8.1.20.0040.00417.74
8.1.10.0000.00817.61
8.1.00.0080.00017.77
8.0.300.0040.00420.02
8.0.290.0040.00417.30
8.0.280.0070.00018.57
8.0.270.0030.00317.33
8.0.260.0030.00317.01
8.0.250.0040.00417.14
8.0.240.0000.00717.02
8.0.230.0070.00017.07
8.0.220.0070.00016.99
8.0.210.0070.00017.09
8.0.200.0030.00316.98
8.0.190.0000.00717.00
8.0.180.0000.00717.12
8.0.170.0000.00817.01
8.0.160.0030.00317.15
8.0.150.0040.00417.01
8.0.140.0030.00417.00
8.0.130.0000.00513.44
8.0.120.0030.00616.96
8.0.110.0070.00017.11
8.0.100.0000.00717.02
8.0.90.0030.00517.18
8.0.80.0070.01016.97
8.0.70.0000.00717.03
8.0.60.0000.00716.94
8.0.50.0040.00416.92
8.0.30.0140.00417.23
8.0.20.0110.00617.40
8.0.10.0000.00717.09
8.0.00.0080.01316.83
7.4.330.0000.00516.88
7.4.320.0000.00716.40
7.4.300.0000.00616.52
7.4.290.0000.00716.64
7.4.280.0030.00716.55
7.4.270.0000.00716.61
7.4.260.0000.00513.20
7.4.250.0040.00416.47
7.4.240.0040.00416.57
7.4.230.0000.00716.70
7.4.220.0160.00616.55
7.4.210.0080.00816.55
7.4.200.0070.00016.52
7.4.190.0000.00716.64
7.4.160.0060.01416.43
7.4.150.0130.01017.40
7.4.140.0090.00817.86
7.4.130.0080.01016.60
7.4.120.0110.00616.66
7.4.110.0100.00716.76
7.4.100.0180.00716.71
7.4.90.0130.00316.36
7.4.80.0120.00619.39
7.4.70.0120.00316.62
7.4.60.0030.01316.53
7.4.50.0060.00316.57
7.4.40.0080.00622.77
7.4.30.0120.00816.59
7.4.00.0100.00314.95
7.3.330.0020.00213.23
7.3.320.0000.00613.32
7.3.310.0040.00416.26
7.3.300.0000.00716.30
7.3.290.0100.00316.27
7.3.280.0060.00916.40
7.3.270.0060.01117.40
7.3.260.0140.01018.24
7.3.250.0140.00716.43
7.3.240.0120.00616.66
7.3.230.0120.00616.39
7.3.210.0140.00316.33
7.3.200.0110.00819.39
7.3.190.0030.01416.66
7.3.180.0090.00816.50
7.3.170.0120.00316.45
7.3.160.0150.00316.51
7.3.120.0070.00715.13
7.2.330.0040.01416.79
7.2.320.0110.01516.39
7.2.310.0030.01816.71
7.2.300.0100.00716.34
7.2.290.0060.01216.75
7.2.00.0000.00919.36
7.1.100.0080.01118.20
7.1.70.0000.01017.18
7.1.60.0070.01719.17
7.1.50.0160.00616.82
7.1.00.0000.08022.51
7.0.200.0150.00414.77
7.0.140.0130.06021.96
7.0.100.0130.07319.85
7.0.90.0030.07719.90
7.0.80.0070.08319.89
7.0.70.0070.06019.83
7.0.60.0030.08319.93
7.0.50.0200.07020.27
7.0.40.0030.07320.05
7.0.30.0100.08019.94
7.0.20.0100.04719.87
7.0.10.0030.07020.07
7.0.00.0200.04020.05
5.6.280.0130.06321.13
5.6.250.0100.07020.73
5.6.240.0100.08020.59
5.6.230.0100.07720.63
5.6.220.0100.09320.54
5.6.210.0070.04720.57
5.6.200.0070.08321.02
5.6.190.0070.08321.01
5.6.180.0130.04720.89
5.6.170.0100.03721.07
5.6.160.0100.04021.09
5.6.150.0100.03721.09
5.6.140.0000.04720.89
5.6.130.0100.04320.96
5.6.120.0030.06321.03
5.6.110.0030.04020.94
5.6.100.0030.04021.11
5.6.90.0070.08320.88
5.6.80.0000.06020.24
5.6.70.0000.09020.41
5.6.60.0030.04020.32
5.6.50.0070.03320.46
5.6.40.0030.04020.38
5.6.30.0030.04020.43
5.6.20.0070.03320.33
5.6.10.0100.03020.26
5.6.00.0100.03020.25
5.5.380.0230.03320.30
5.5.370.0100.07320.35
5.5.360.0100.07720.51
5.5.350.0070.07720.39
5.5.340.0070.08320.74
5.5.330.0100.08320.84
5.5.320.0030.07720.86
5.5.310.0070.04320.73
5.5.300.0070.03320.59
5.5.290.0100.03720.80
5.5.280.0030.04320.83
5.5.270.0100.04020.86
5.5.260.0000.04320.84
5.5.250.0100.06720.64
5.5.240.0030.04020.19
5.5.230.0030.07020.21
5.5.220.0070.04720.07
5.5.210.0130.02720.19
5.5.200.0000.04020.21
5.5.190.0030.05720.19
5.5.180.0070.06020.14
5.5.160.0070.06020.22
5.5.150.0100.03720.02
5.5.140.0100.03720.22
5.5.130.0000.05320.17
5.5.120.0030.04020.19
5.5.110.0030.04020.07
5.5.100.0070.03720.07
5.5.90.0030.04320.09
5.5.80.0070.06720.10
5.5.70.0030.04019.88
5.5.60.0070.04720.01
5.5.50.0070.03720.06
5.5.40.0030.06020.08
5.5.30.0030.07320.00
5.5.20.0070.07719.99
5.5.10.0070.04720.00
5.5.00.0030.06320.00
5.4.450.0070.03719.28
5.4.440.0030.04019.38
5.4.430.0100.04319.44
5.4.420.0000.04019.29
5.4.410.0030.05319.32
5.4.400.0000.04019.03
5.4.390.0000.05019.06
5.4.380.0030.05718.99
5.4.370.0100.06319.04
5.4.360.0070.07718.95
5.4.350.0030.06318.89
5.4.340.0000.04319.06
5.4.320.0070.03719.03
5.4.310.0100.03019.15
5.4.300.0000.04019.05
5.4.290.0030.03719.15
5.4.280.0030.03719.08
5.4.270.0030.03718.95
5.4.260.0030.04019.10
5.4.250.0030.04018.90
5.4.240.0030.04719.04
5.4.230.0070.04019.04
5.4.220.0100.05319.13
5.4.210.0030.03719.03
5.4.200.0030.05019.10
5.4.190.0030.07719.05
5.4.180.0070.07719.04
5.4.170.0100.07019.14
5.4.160.0070.07019.01
5.4.150.0130.06718.95
5.4.140.0170.06716.32
5.4.130.0070.06316.34
5.4.120.0100.06716.23
5.4.110.0100.04316.39
5.4.100.0070.06716.31
5.4.90.0130.06316.34
5.4.80.0130.06716.38
5.4.70.0070.05016.25
5.4.60.0070.07716.31
5.4.50.0070.07316.24
5.4.40.0100.07016.36
5.4.30.0100.07716.33
5.4.20.0030.07316.23
5.4.10.0030.07716.42
5.4.00.0070.07315.79
5.3.290.0070.03314.65
5.3.280.0130.02714.45
5.3.270.0030.07714.59
5.3.260.0030.08014.60
5.3.250.0030.08014.52
5.3.240.0200.06014.46
5.3.230.0070.05314.60
5.3.220.0070.07714.43
5.3.210.0130.06714.57
5.3.200.0130.06714.41
5.3.190.0100.06314.56
5.3.180.0030.05014.52
5.3.170.0070.07314.43
5.3.160.0100.06714.55
5.3.150.0100.07014.42
5.3.140.0070.07714.52
5.3.130.0070.07714.54
5.3.120.0070.07714.41
5.3.110.0070.07714.41
5.3.100.0000.07713.89
5.3.90.0170.03013.96
5.3.80.0030.07713.87
5.3.70.0100.07013.76
5.3.60.0100.06713.76
5.3.50.0100.06313.92
5.3.40.0030.07013.93
5.3.30.0070.06313.86
5.3.20.0070.04013.60
5.3.10.0100.06713.41
5.3.00.0030.07313.61
5.2.170.0070.06011.14
5.2.160.0070.05010.96
5.2.150.0100.05711.11
5.2.140.0030.06711.20
5.2.130.0030.06310.92
5.2.120.0030.03710.95
5.2.110.0030.06311.10
5.2.100.0070.06011.10
5.2.90.0070.05711.02
5.2.80.0030.06011.04
5.2.70.0070.05011.16
5.2.60.0070.06310.89
5.2.50.0030.05311.08
5.2.40.0130.05310.95
5.2.30.0070.05311.01
5.2.20.0070.03010.94
5.2.10.0070.05710.84
5.2.00.0030.05310.73
5.1.60.0100.04710.07
5.1.50.0030.03010.10
5.1.40.0030.05310.03
5.1.30.0000.03710.39
5.1.20.0030.05710.21
5.1.10.0070.02710.12
5.1.00.0130.05010.14
5.0.50.0000.0478.61
5.0.40.0000.0478.54
5.0.30.0030.0638.54
5.0.20.0070.0408.54
5.0.10.0070.0308.54
5.0.00.0070.0578.54
4.4.90.0000.0378.54
4.4.80.0000.0378.54
4.4.70.0000.0208.54
4.4.60.0030.0338.54
4.4.50.0130.0278.54
4.4.40.0030.0508.54
4.4.30.0100.0308.54
4.4.20.0070.0378.54
4.4.10.0100.0308.54
4.4.00.0070.0508.54
4.3.110.0000.0338.54
4.3.100.0000.0338.54
4.3.90.0000.0378.54
4.3.80.0030.0338.54
4.3.70.0030.0338.54
4.3.60.0000.0378.54
4.3.50.0000.0378.54
4.3.40.0030.0508.54
4.3.30.0000.0338.54
4.3.20.0030.0338.54
4.3.10.0070.0278.54
4.3.00.0030.0238.54

preferences:
49.34 ms | 401 KiB | 5 Q