3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string_var = "μ"; $enc=mb_detect_encoding($string_var, "UTF-8,ISO-8859-1"); $string_var=mb_convert_encoding($string_var,"UTF-8",$enc); var_dump($string_var);

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)
8.3.60.0120.00616.36
8.3.50.0140.00721.91
8.3.40.0150.00318.51
8.3.30.0030.01019.02
8.3.20.0000.00920.22
8.3.10.0080.00021.68
8.3.00.0070.00319.02
8.2.180.0070.01117.00
8.2.170.0070.00722.96
8.2.160.0100.00322.38
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0000.00819.89
8.2.110.0090.00019.32
8.2.100.0120.00017.93
8.2.90.0000.00819.22
8.2.80.0040.00417.97
8.2.70.0030.00617.63
8.2.60.0060.00317.68
8.2.50.0030.00618.07
8.2.40.0000.00819.88
8.2.30.0040.00418.21
8.2.20.0000.00817.86
8.2.10.0050.00318.33
8.2.00.0000.00717.96
8.1.280.0140.00025.92
8.1.270.0060.00319.00
8.1.260.0040.00426.35
8.1.250.0050.00328.09
8.1.240.0000.00924.14
8.1.230.0110.00020.96
8.1.220.0030.00617.79
8.1.210.0030.00618.77
8.1.200.0100.00017.35
8.1.190.0000.00917.48
8.1.180.0040.00418.10
8.1.170.0090.00018.68
8.1.160.0040.00422.04
8.1.150.0000.00718.91
8.1.140.0000.00717.57
8.1.130.0030.00317.93
8.1.120.0000.00717.61
8.1.110.0000.00817.57
8.1.100.0040.00417.55
8.1.90.0040.00417.48
8.1.80.0000.00717.57
8.1.70.0070.00017.54
8.1.60.0060.00317.64
8.1.50.0040.00417.62
8.1.40.0040.00417.51
8.1.30.0050.00317.78
8.1.20.0040.00417.59
8.1.10.0080.00017.64
8.1.00.0080.00017.65
8.0.300.0000.00718.77
8.0.290.0040.00416.88
8.0.280.0070.00018.54
8.0.270.0050.00217.21
8.0.260.0030.00317.30
8.0.250.0040.00416.91
8.0.240.0030.00617.04
8.0.230.0000.00717.04
8.0.220.0040.00416.96
8.0.210.0000.00816.96
8.0.200.0030.00317.00
8.0.190.0040.00416.96
8.0.180.0050.00316.98
8.0.170.0000.00716.87
8.0.160.0040.00417.02
8.0.150.0040.00316.75
8.0.140.0040.00416.89
8.0.130.0060.00013.37
8.0.120.0000.00716.79
8.0.110.0000.00716.84
8.0.100.0070.00016.75
8.0.90.0030.00417.00
8.0.80.0000.01516.98
8.0.70.0070.00016.88
8.0.60.0030.00516.93
8.0.50.0030.00516.75
8.0.30.0050.01517.15
8.0.20.0240.01117.40
8.0.10.0000.00716.99
8.0.00.0090.01116.74
7.4.330.0050.00015.15
7.4.320.0030.00316.70
7.4.300.0070.00016.67
7.4.290.0070.00016.70
7.4.280.0000.00716.48
7.4.270.0070.00016.70
7.4.260.0070.00016.52
7.4.250.0030.00516.70
7.4.240.0040.00416.61
7.4.230.0000.00716.66
7.4.220.0060.01116.42
7.4.210.0130.00316.52
7.4.200.0000.00616.73
7.4.160.0060.00916.53
7.4.150.0070.01417.40
7.4.140.0090.01017.86
7.4.130.0100.01016.47
7.4.120.0100.00916.54
7.4.110.0130.00316.54
7.4.100.0100.00716.42
7.4.90.0100.00716.48
7.4.80.0060.01116.32
7.4.70.0100.01016.60
7.4.60.0140.00716.65
7.4.50.0040.00416.52
7.4.40.0140.00716.46
7.4.30.0140.00716.69
7.4.00.0100.00714.95
7.3.330.0030.00513.00
7.3.320.0040.01113.07
7.3.310.0050.00216.20
7.3.300.0030.00316.25
7.3.290.0080.00716.20
7.3.280.0080.00816.27
7.3.270.0090.00917.40
7.3.260.0120.00616.63
7.3.250.0050.01216.25
7.3.240.0070.01016.34
7.3.230.0080.00816.49
7.3.210.0060.01116.27
7.3.200.0110.01019.39
7.3.190.0100.00716.10
7.3.180.0040.01116.34
7.3.170.0030.01416.44
7.3.160.0070.01016.64
7.3.10.0060.00616.36
7.3.00.0030.01016.80
7.2.330.0060.01316.60
7.2.320.0150.00316.68
7.2.310.0150.00616.59
7.2.300.0090.00816.36
7.2.290.0100.00716.44
7.2.130.0060.00616.80
7.2.120.0000.01516.90
7.2.110.0060.00616.67
7.2.100.0060.00616.70
7.2.90.0060.00617.11
7.2.80.0000.01016.86
7.2.70.0030.00716.72
7.2.60.0050.00516.71
7.2.50.0100.00016.95
7.2.40.0030.00716.80
7.2.30.0040.00816.82
7.2.20.0040.01116.84
7.2.10.0070.00817.02
7.2.00.0100.01017.77
7.1.250.0120.00015.84
7.1.100.0000.01117.98
7.1.70.0130.00617.25
7.1.60.0100.01419.46
7.1.50.0030.01316.83
7.1.00.0000.08022.31
7.0.200.0090.00915.02
7.0.140.0030.06022.15
7.0.60.0070.05019.82
7.0.50.0070.08017.71
7.0.40.0170.05320.27
7.0.30.0200.04320.21
7.0.20.0230.08020.18
7.0.10.0070.05020.13
7.0.00.0100.05020.29
5.6.280.0000.07320.88
5.6.210.0100.08320.66
5.6.200.0030.09018.16
5.6.190.0030.05320.32
5.6.180.0470.06320.41
5.6.170.0230.06020.41
5.6.160.0070.07020.54
5.6.150.0070.08318.11
5.6.140.0070.04718.11
5.6.130.0070.07718.10
5.6.120.0100.08321.14
5.6.110.0030.04021.11
5.6.100.0100.03721.12
5.6.90.0030.09320.92
5.6.80.0000.07720.40
5.5.350.0300.07720.40
5.5.340.0170.07017.97
5.5.330.0100.08020.36
5.5.320.0070.07720.34
5.5.310.0170.03720.26
5.5.300.0130.05017.95
5.5.290.0130.03717.90
5.5.280.0070.08020.84
5.5.270.0070.08020.63
5.5.260.0000.06320.83
5.5.250.0100.04020.49
5.5.240.0070.06320.34
5.4.450.0600.05319.32
5.4.440.0830.05719.50
5.4.430.0000.07019.48
5.4.420.0830.07019.47
5.4.410.1370.04719.39
5.4.400.1100.05719.28
5.4.390.0170.05318.64
5.4.380.0170.05318.43
5.4.370.0200.05718.61
5.4.360.0200.05018.68
5.4.350.0100.06018.62
5.4.340.0100.06018.67
5.4.320.0130.05718.70
5.4.310.0170.05018.55
5.4.300.0270.04018.76
5.4.290.0270.04018.47
5.4.280.0100.05718.40
5.4.270.0130.06018.70
5.4.260.0130.05318.38
5.4.250.0200.05018.55
5.4.240.0100.06318.47
5.4.230.0170.05718.71
5.4.220.0170.05318.55
5.4.210.0270.04718.55
5.4.200.0100.06716.46
5.4.190.0170.05718.45
5.4.180.0270.05318.54
5.4.170.0130.06318.71
5.4.160.0270.06718.54
5.4.150.0270.06718.54
5.4.140.0200.05016.05
5.4.130.0230.04716.34
5.4.120.0200.04716.26
5.4.110.0130.05316.09
5.4.100.0270.06316.15
5.4.90.0230.05016.25
5.4.80.0230.04316.23
5.4.70.0100.05716.23
5.4.60.0200.05016.15
5.4.50.0200.04716.12
5.4.40.0070.06316.12
5.4.30.0200.05016.11
5.4.20.0130.05315.98
5.4.10.0170.06715.98
5.4.00.0230.06015.69
5.3.290.0200.05014.55
5.3.280.0270.04314.55
5.3.270.0170.05314.52
5.3.260.0230.04714.61
5.3.250.0100.06014.59
5.3.240.0170.06014.61
5.3.230.0170.05714.54
5.3.220.0130.05714.55
5.3.210.0270.05314.53
5.3.200.0200.05714.53
5.3.190.0300.05714.63
5.3.180.0230.04714.42
5.3.170.0130.05314.54
5.3.160.0200.04714.54
5.3.150.0130.05314.50
5.3.140.0100.05714.54
5.3.130.0370.03314.40
5.3.120.0270.05014.63
5.3.110.0100.06014.62
5.3.100.0170.05314.10
5.3.90.0130.05314.01
5.3.80.0170.05014.08
5.3.70.0170.05014.00
5.3.60.0230.05713.99
5.3.50.0230.04713.93
5.3.40.0230.04713.88
5.3.30.0170.05013.81
5.3.20.0170.05313.63
5.3.10.0130.07313.55
5.3.00.0200.07013.60
5.2.170.0100.05311.27
5.2.160.0130.04311.09
5.2.150.0230.03311.13
5.2.140.0130.04011.10
5.2.130.0200.03711.13
5.2.120.0130.03711.09
5.2.110.0230.03011.13
5.2.100.0170.04011.02
5.2.90.0100.04311.10
5.2.80.0200.03311.09
5.2.70.0200.04011.00
5.2.60.0170.04711.09
5.2.50.0130.04310.96
5.2.40.0030.05010.95
5.2.30.0130.04310.94
5.2.20.0170.04310.98
5.2.10.0130.03710.89
5.2.00.0130.05310.84
5.1.60.0130.0409.95
5.1.50.0100.03710.04
5.1.40.0130.03010.09
5.1.30.0200.02710.30
5.1.20.0100.04310.33
5.1.10.0130.03710.09
5.1.00.0100.03710.12
5.0.50.0030.0338.55
5.0.40.0000.0338.42
5.0.30.0070.0438.23
5.0.20.0070.0308.38
5.0.10.0030.0338.22
5.0.00.0130.0378.34
4.4.90.0130.0175.90
4.4.80.0070.0235.89
4.4.70.0070.0235.86
4.4.60.0070.0275.92
4.4.50.0030.0275.86
4.4.40.0000.0405.87
4.4.30.0000.0275.91
4.4.20.0100.0275.91
4.4.10.0030.0275.93
4.4.00.0100.0335.89
4.3.110.0030.0235.86
4.3.100.0030.0275.84
4.3.90.0070.0305.89
4.3.80.0030.0435.82
4.3.70.0070.0205.82
4.3.60.0130.0175.78
4.3.50.0070.0205.91
4.3.40.0070.0335.75
4.3.30.0070.0204.64
4.3.20.0000.0234.61
4.3.10.0070.0204.47
4.3.00.0170.01714.62

preferences:
67.12 ms | 401 KiB | 5 Q