3v4l.org

run code in 300+ PHP versions simultaneously
<?php mb_internal_encoding('UTF-8'); echo 'Subject: ', mb_encode_mimeheader('☂', 'UTF-8', 'B');

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)
8.3.70.0060.00916.63
8.3.60.0130.00718.43
8.3.50.0090.01321.92
8.3.40.0100.00718.55
8.3.30.0090.00618.42
8.3.20.0080.00018.60
8.3.10.0060.00320.34
8.3.00.0040.00423.61
8.2.180.0070.01416.38
8.2.170.0070.01022.96
8.2.160.0090.00622.26
8.2.150.0090.00024.18
8.2.140.0070.00024.66
8.2.130.0070.00026.16
8.2.120.0040.00419.52
8.2.110.0100.00020.94
8.2.100.0040.00817.75
8.2.90.0040.00419.08
8.2.80.0000.00817.97
8.2.70.0060.00317.63
8.2.60.0060.00317.80
8.2.50.0060.00318.07
8.2.40.0120.00018.22
8.2.30.0040.00419.84
8.2.20.0000.00817.64
8.2.10.0040.00417.58
8.2.00.0040.00417.42
8.1.280.0070.01425.92
8.1.270.0070.00023.99
8.1.260.0080.00626.35
8.1.250.0000.00828.09
8.1.240.0090.00022.24
8.1.230.0040.00820.92
8.1.220.0000.00818.77
8.1.210.0000.00719.02
8.1.200.0070.00317.23
8.1.190.0040.00417.28
8.1.180.0000.00818.10
8.1.170.0030.00618.84
8.1.160.0000.00818.73
8.1.150.0000.00818.48
8.1.140.0000.00817.34
8.1.130.0070.00017.69
8.1.120.0070.00017.38
8.1.110.0050.00317.43
8.1.100.0050.00317.39
8.1.90.0000.00717.29
8.1.80.0030.00517.38
8.1.70.0030.00317.34
8.1.60.0030.00617.52
8.1.50.0040.00417.41
8.1.40.0000.00817.35
8.1.30.0050.00217.54
8.1.20.0000.00917.59
8.1.10.0040.00417.54
8.1.00.0000.00717.44
8.0.300.0060.00620.02
8.0.290.0040.00416.75
8.0.280.0000.00718.37
8.0.270.0000.00717.29
8.0.260.0030.00316.81
8.0.250.0000.00716.84
8.0.240.0040.00416.98
8.0.230.0070.00316.79
8.0.220.0030.00316.69
8.0.210.0030.00516.68
8.0.200.0070.00016.95
8.0.190.0030.00516.92
8.0.180.0040.00416.73
8.0.170.0030.00616.83
8.0.160.0000.00716.83
8.0.150.0060.00316.78
8.0.140.0050.00616.70
8.0.130.0050.00313.22
8.0.120.0000.00916.80
8.0.110.0030.00516.72
8.0.100.0040.00416.72
8.0.90.0040.00316.80
8.0.80.0070.01116.86
8.0.70.0050.00216.60
8.0.60.0040.00416.80
8.0.50.0050.00216.76
8.0.30.0120.00717.13
8.0.20.0140.00617.40
8.0.10.0070.00016.91
8.0.00.0110.00616.71
7.4.330.0050.00014.77
7.4.320.0030.00316.52
7.4.300.0060.00016.50
7.4.290.0040.00416.42
7.4.280.0000.00816.57
7.4.270.0030.00316.39
7.4.260.0060.00013.21
7.4.250.0080.00016.54
7.4.240.0070.00016.35
7.4.230.0000.00716.33
7.4.220.0040.01716.34
7.4.210.0030.01116.45
7.4.200.0090.00016.27
7.4.190.0050.00316.52
7.4.160.0100.00616.36
7.4.150.0100.00717.40
7.4.140.0120.00717.86
7.4.130.0130.00416.44
7.4.120.0110.00716.40
7.4.110.0030.01316.29
7.4.100.0110.01116.36
7.4.90.0110.00616.33
7.4.80.0000.01619.04
7.4.70.0090.00916.22
7.4.60.0060.01316.26
7.4.50.0040.00416.20
7.4.40.0030.01322.27
7.4.30.0060.00916.35
7.4.00.0100.00314.61
7.3.330.0020.00213.04
7.3.320.0030.00312.83
7.3.310.0040.00416.26
7.3.300.0000.00716.21
7.3.290.0080.00516.11
7.3.280.0020.01416.13
7.3.270.0160.00017.40
7.3.260.0120.00618.24
7.3.250.0100.00716.30
7.3.240.0090.00916.33
7.3.230.0100.00916.48
7.3.210.0100.00716.39
7.3.200.0070.01019.39
7.3.190.0120.00916.16
7.3.180.0110.00416.29
7.3.170.0040.01116.27
7.3.160.0060.00916.32
7.3.120.0090.00614.86
7.2.330.0110.00616.42
7.2.320.0080.00816.24
7.2.310.0000.01716.46
7.2.300.0060.01216.61
7.2.290.0200.00316.49
7.1.100.0090.00318.22
7.1.70.0060.00317.11
7.1.60.0070.01719.40
7.1.50.0100.01016.86
7.1.00.0100.06022.45
7.0.200.0050.00216.55
7.0.140.0000.07722.08
7.0.60.0130.07719.93
7.0.50.0070.08017.86
7.0.40.0130.04019.90
7.0.30.0500.06720.13
7.0.20.0270.07320.09
7.0.10.0170.06020.09
7.0.00.0000.09320.09
5.6.280.0100.06721.14
5.6.210.0070.06020.75
5.6.200.0000.06718.10
5.6.190.0030.09020.77
5.6.180.3230.03720.35
5.6.170.0300.07720.60
5.6.160.0030.04020.54
5.6.150.0070.08718.21
5.6.140.0000.04318.11
5.6.130.0070.08318.21
5.6.120.0030.05020.98
5.6.110.0100.08321.13
5.6.100.0000.04321.16
5.6.90.0100.08021.11
5.6.80.0130.05020.40
5.6.70.4270.04320.36
5.5.350.0030.03720.42
5.5.340.0100.03317.91
5.5.330.0070.04020.37
5.5.320.0230.05020.39
5.5.310.0230.05320.20
5.5.300.0130.07717.98
5.5.290.0030.07018.01
5.5.280.0070.08320.67
5.5.270.0070.08320.88
5.5.260.0070.06720.75
5.5.250.0000.06320.66
5.5.240.0430.05320.34
5.4.450.4470.04019.29
5.4.440.0130.04319.56
5.4.430.1570.07319.24
5.4.420.4270.04019.46
5.4.410.0070.08019.35
5.4.400.3630.03719.06
5.4.390.3400.04019.14
5.4.380.3500.04018.97
5.4.370.4100.04718.93
5.4.360.4400.04019.20
5.4.350.4070.03319.18
5.4.340.4300.03719.04
5.4.320.4500.03319.04
5.4.310.3970.03319.15
5.4.300.4170.04319.17
5.4.290.3830.03319.14
5.4.280.4130.04319.14
5.4.270.3430.02718.92
5.4.260.3270.04019.00
5.4.250.3670.04019.12
5.4.240.3070.04319.12
5.4.230.3430.04019.08
5.4.220.3130.04019.08
5.4.210.3600.02718.96
5.4.200.4500.04019.13
5.4.190.3870.03719.07
5.4.180.3900.03718.95
5.4.170.3470.03318.99
5.4.160.4530.03718.86
5.4.150.3800.03719.02
5.4.140.3900.04016.42
5.4.130.4170.04016.42
5.4.120.3730.03716.42
5.4.110.4070.03716.38
5.4.100.3870.03316.27
5.4.90.4100.03716.43
5.4.80.3670.03316.47
5.4.70.3700.03316.61
5.4.60.3830.04016.34
5.4.50.4530.03016.13
5.4.40.4570.04016.44
5.4.30.4230.03316.44
5.4.20.3900.03316.46
5.4.10.3600.03316.43
5.4.00.4170.04015.67
5.3.290.4200.04014.58
5.3.280.2730.03714.56
5.3.270.4070.04014.62
5.3.260.4600.03714.55
5.3.250.3800.03014.62
5.3.240.3800.04314.41
5.3.230.3900.03714.54
5.3.220.3500.03714.48
5.3.210.3770.03314.50
5.3.200.3200.03714.58
5.3.190.4100.02714.44
5.3.180.3400.03314.50
5.3.170.3830.03714.50
5.3.160.4130.03714.48
5.3.150.4700.04014.48
5.3.140.4200.03714.51
5.3.130.4400.03714.47
5.3.120.3800.03314.48
5.3.110.4000.04014.56
5.3.100.3900.03713.85
5.3.90.4170.03713.97
5.3.80.3570.03713.80
5.3.70.3500.04013.99
5.3.60.3730.03313.93
5.3.50.3530.03714.03
5.3.40.3870.03313.76
5.3.30.3870.03313.88
5.3.20.4430.03013.70
5.3.10.3830.03713.74
5.3.00.4570.04013.58
5.2.170.3270.03011.13
5.2.160.3300.03011.30
5.2.150.2930.03311.11
5.2.140.3030.02711.07
5.2.130.3700.02710.99
5.2.120.3130.02711.09
5.2.110.3070.02710.98
5.2.100.3570.02711.09
5.2.90.3600.02311.00
5.2.80.3100.03011.02
5.2.70.3700.03310.97
5.2.60.3130.03010.96
5.2.50.4170.02310.94
5.2.40.2100.02311.08
5.2.30.0100.05010.86
5.2.20.0070.06310.91
5.2.10.0100.05710.95
5.2.00.1670.03710.71
5.1.60.3300.0179.83
5.1.50.2700.0239.89
5.1.40.2930.0209.88
5.1.30.3000.02310.22
5.1.20.2600.03010.39
5.1.10.2570.03010.01
5.1.00.2400.02010.01
5.0.50.1530.0238.54
5.0.40.1500.0238.42
5.0.30.1600.0308.12
5.0.20.1230.0178.17
5.0.10.1500.0238.18
5.0.00.1500.0338.15
4.4.90.1430.0076.60
4.4.80.1300.0206.60
4.4.70.0000.0336.60
4.4.60.0000.0336.60
4.4.50.0000.0236.60
4.4.40.1670.0206.60
4.4.30.1670.0136.60
4.4.20.1530.0136.60
4.4.10.1200.0136.60
4.4.00.1500.0276.60
4.3.110.1400.0176.60
4.3.100.1670.0136.60
4.3.90.1200.0136.60
4.3.80.1670.0236.60
4.3.70.1700.0136.60
4.3.60.1630.0136.60
4.3.50.1870.0176.60
4.3.40.1630.0276.60
4.3.30.0930.0236.60
4.3.20.0800.0136.60
4.3.10.0970.0206.60
4.3.00.0800.0176.60

preferences:
34.94 ms | 401 KiB | 5 Q