3v4l.org

run code in 300+ PHP versions simultaneously
<?php $encoding = mb_internal_encoding(); $unicode = '00f0'; $test = mb_convert_encoding( pack('H*', $unicode), $encoding, 'UTF-16BE' ); var_dump(json_encode($test));

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)
8.3.60.0080.00616.50
8.3.50.0150.00517.24
8.3.40.0140.00718.73
8.3.30.0070.00718.54
8.3.20.0040.00418.38
8.3.10.0030.00618.45
8.3.00.0090.00019.13
8.2.180.0120.00316.75
8.2.170.0140.00722.96
8.2.160.0110.00621.03
8.2.150.0090.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00419.11
8.2.110.0060.00319.25
8.2.100.0000.01417.59
8.2.90.0050.00320.83
8.2.80.0060.00319.28
8.2.70.0080.00017.50
8.2.60.0080.00018.04
8.2.50.0000.00818.07
8.2.40.0030.00517.95
8.2.30.0050.00218.09
8.2.20.0080.00017.63
8.2.10.0040.00417.74
8.2.00.0050.00517.80
8.1.280.0040.01125.92
8.1.270.0040.00424.66
8.1.260.0060.00326.35
8.1.250.0080.00028.09
8.1.240.0100.01023.82
8.1.230.0090.00320.89
8.1.220.0000.00718.77
8.1.210.0000.00719.22
8.1.200.0040.00417.36
8.1.190.0060.00317.65
8.1.180.0030.00518.10
8.1.170.0000.00818.76
8.1.160.0040.00418.85
8.1.150.0000.00718.59
8.1.140.0000.00717.38
8.1.130.0050.00317.82
8.1.120.0000.00717.52
8.1.110.0040.00417.33
8.1.100.0030.00317.45
8.1.90.0030.00617.38
8.1.80.0030.00317.47
8.1.70.0000.00717.34
8.1.60.0040.00417.56
8.1.50.0000.00817.34
8.1.40.0030.00617.51
8.1.30.0000.00717.53
8.1.20.0080.00017.51
8.1.10.0000.00817.39
8.1.00.0030.00517.36
8.0.300.0000.00720.02
8.0.290.0050.00316.63
8.0.280.0080.00018.40
8.0.270.0070.00017.26
8.0.260.0000.00716.81
8.0.250.0040.00416.84
8.0.240.0040.00416.93
8.0.230.0000.00716.84
8.0.220.0030.00316.87
8.0.210.0030.00316.87
8.0.200.0000.00616.98
8.0.190.0040.00416.94
8.0.180.0070.00016.77
8.0.170.0050.00516.91
8.0.160.0030.00316.85
8.0.150.0060.00316.72
8.0.140.0000.00816.84
8.0.130.0030.00313.30
8.0.120.0030.00516.70
8.0.110.0000.00816.80
8.0.100.0070.00016.77
8.0.90.0040.00416.76
8.0.80.0060.00916.84
8.0.70.0050.00216.80
8.0.60.0000.00716.87
8.0.50.0000.00716.82
8.0.30.0100.00716.96
8.0.20.0130.00917.01
8.0.10.0040.00417.05
8.0.00.0100.00916.67
7.4.330.0000.00513.00
7.4.320.0030.00316.52
7.4.300.0000.00716.51
7.4.290.0000.00616.44
7.4.280.0040.00416.59
7.4.270.0000.00616.57
7.4.260.0050.00013.29
7.4.250.0030.00616.39
7.4.240.0030.00316.52
7.4.230.0030.00316.63
7.4.220.0120.00616.45
7.4.210.0080.00816.51
7.4.200.0030.00316.38
7.4.190.0050.00316.73
7.4.160.0050.01016.38
7.4.150.0190.00416.38
7.4.140.0110.01016.43
7.4.130.0130.00516.33
7.4.120.0060.01016.40
7.4.110.0070.01116.39
7.4.100.0140.00716.47
7.4.90.0060.01416.48
7.4.80.0030.01719.39
7.4.70.0070.01016.30
7.4.60.0090.00816.43
7.4.50.0090.00016.37
7.4.40.0040.01516.22
7.4.30.0130.00316.32
7.4.00.0070.01014.77
7.3.330.0000.00612.95
7.3.320.0030.00313.07
7.3.310.0060.00016.34
7.3.300.0070.00016.23
7.3.290.0100.01116.32
7.3.280.0090.00916.22
7.3.270.0120.00616.24
7.3.260.0160.00016.55
7.3.250.0090.01416.20
7.3.240.0100.00616.18
7.3.230.0030.01316.10
7.3.210.0080.00816.30
7.3.200.0150.00816.52
7.3.190.0140.00716.30
7.3.180.0060.01016.31
7.3.170.0100.00716.30
7.3.160.0060.00916.43
7.3.120.0090.00614.98
7.2.330.0060.01216.54
7.2.320.0110.00716.23
7.2.310.0090.01516.39
7.2.300.0130.00316.42
7.2.290.0140.00716.54
7.1.200.0050.00315.80
7.1.70.0040.00417.00
7.1.60.0040.01819.40
7.1.50.0070.01316.64
7.1.00.0030.07022.44
7.0.200.0000.01016.77
7.0.140.0000.07322.13
7.0.120.0070.07022.04
7.0.90.0100.07320.03
7.0.80.0700.08319.82
7.0.70.0530.06319.87
7.0.60.0400.08019.99
7.0.50.0370.04320.35
7.0.40.0170.07020.10
7.0.30.0100.05720.15
7.0.20.0030.09020.04
7.0.10.0000.06720.15
7.0.00.0030.05320.07
5.6.280.0000.07721.07
5.6.240.0170.07320.69
5.6.230.0170.06720.71
5.6.220.0100.07720.60
5.6.210.0070.04720.55
5.6.200.0030.04721.00
5.6.190.0070.08321.07
5.6.180.0100.09321.02
5.6.170.0070.08020.93
5.6.160.0170.06721.10
5.6.150.0070.07720.95
5.6.140.0130.07321.09
5.6.130.0100.08021.00
5.6.120.0170.07720.92
5.6.110.0070.08321.03
5.6.100.0100.08021.00
5.6.90.0100.06721.04
5.6.80.0100.07320.49
5.6.70.0100.08020.45
5.6.60.0130.07020.32
5.6.50.0000.05320.35
5.6.40.0070.04020.37
5.6.30.0100.07020.35
5.6.20.0200.06720.52
5.6.10.0030.08720.30
5.6.00.0100.08020.45
5.5.380.0100.07720.39
5.5.370.0130.07320.44
5.5.360.0030.08020.32
5.5.350.0030.08720.32
5.5.340.0070.06720.88
5.5.330.0100.08320.84
5.5.320.0070.04320.77
5.5.310.0070.07720.75
5.5.300.0100.08020.63
5.5.290.0100.08320.77
5.5.280.0130.07720.77
5.5.270.0130.05320.81
5.5.260.0270.03720.82
5.5.250.0100.07320.54
5.5.240.0070.06020.29
5.5.230.0100.07720.29
5.5.220.0030.07320.23
5.5.210.0100.06020.24
5.5.200.0070.05720.17
5.5.190.0070.06020.24
5.5.180.0000.09020.26
5.5.160.0100.06720.17
5.5.150.0170.07320.20
5.5.140.0070.06720.11
5.5.130.0130.07020.20
5.5.120.0070.07719.98
5.5.110.0070.04719.97
5.5.100.0100.07720.11
5.5.90.0000.04720.15
5.5.80.0030.04320.14
5.5.70.0100.07720.05
5.5.60.0130.07020.14
5.5.50.0030.08320.08
5.5.40.0070.07320.04
5.5.30.0130.07320.10
5.5.20.0070.06320.06
5.5.10.0100.06020.04
5.5.00.0030.08020.11
5.4.450.0130.06719.36
5.4.440.0130.08019.42
5.4.430.0030.08019.35
5.4.420.0100.07719.11
5.4.410.0170.07319.32
5.4.400.0100.03319.11
5.4.390.0070.05719.03
5.4.380.0200.06019.18
5.4.370.0170.03319.10
5.4.360.0170.06718.96
5.4.350.0070.06718.95
5.4.340.0070.07319.05
5.4.320.0030.06319.09
5.4.310.0170.06719.23
5.4.300.0100.07719.04
5.4.290.0070.08319.12
5.4.280.0000.05719.05
5.4.270.0070.07319.09
5.4.260.0030.07318.79
5.4.250.0100.05019.11
5.4.240.0030.04718.80
5.4.230.0000.08018.80
5.4.220.0100.05319.05
5.4.210.0030.07719.09
5.4.200.0070.04319.04
5.4.190.0030.06719.02
5.4.180.0130.06319.11
5.4.170.0100.07719.02
5.4.160.0130.06719.10
5.4.150.0170.06019.20
5.4.140.0030.06716.34
5.4.130.0070.06316.25
5.4.120.0070.07316.22
5.4.110.0100.07016.21
5.4.100.0070.04016.41
5.4.90.0170.04016.30
5.4.80.0030.07016.38
5.4.70.0000.07016.21
5.4.60.0030.07316.30
5.4.50.0070.07316.42
5.4.40.0130.06316.29
5.4.30.0070.06716.22
5.4.20.0030.07716.28
5.4.10.0030.06016.18
5.4.00.0100.07315.68
5.3.290.0100.06314.64
5.3.280.0070.08014.45
5.3.270.0100.07714.55
5.3.260.0070.08014.46
5.3.250.0030.04014.58
5.3.240.0070.04014.60
5.3.230.0100.07714.58
5.3.220.0100.08314.57
5.3.210.0030.07314.51
5.3.200.0170.07014.40
5.3.190.0100.06714.38
5.3.180.0070.08714.46
5.3.170.0030.06714.50
5.3.160.0030.08014.38
5.3.150.0130.07314.55
5.3.140.0030.05314.51
5.3.130.0070.05014.36
5.3.120.0030.08014.40
5.3.110.0100.08014.54
5.3.100.0100.06313.99
5.3.90.0130.06313.87
5.3.80.0000.07713.87
5.3.70.0030.08013.99
5.3.60.0100.07313.93
5.3.50.0100.07013.70
5.3.40.0030.07313.93
5.3.30.0070.04013.66
5.3.20.0100.06313.66
5.3.10.0100.06713.42
5.3.00.0130.07013.58
5.2.170.0070.06010.98
5.2.160.0030.06710.96
5.2.150.0030.03711.13
5.2.140.0030.06710.98
5.2.130.0070.06011.10
5.2.120.0070.06311.12
5.2.110.0100.03311.08
5.2.100.0030.06711.15
5.2.90.0030.03711.06
5.2.80.0100.06011.09
5.2.70.0070.06711.09
5.2.60.0030.05711.04
5.2.50.0070.06310.80
5.2.40.0070.05310.96
5.2.30.0030.05710.96
5.2.20.0030.05010.92
5.2.10.0070.06010.92
5.2.00.0030.06310.78
5.1.60.0100.04710.04
5.1.50.0000.0579.98
5.1.40.0100.0409.97
5.1.30.0030.05310.38
5.1.20.0070.04310.39
5.1.10.0000.02710.07
5.1.00.0100.05310.13
5.0.50.0070.0438.37
5.0.40.0070.0408.43
5.0.30.0070.0578.20
5.0.20.0100.0308.24
5.0.10.0030.0408.25
5.0.00.0100.0607.98
4.4.90.0000.0377.27
4.4.80.0030.0337.27
4.4.70.0000.0377.27
4.4.60.0030.0377.27
4.4.50.0000.0377.27
4.4.40.0000.0377.27
4.4.30.0030.0307.27
4.4.20.0030.0177.27
4.4.10.0070.0337.27
4.4.00.0000.0537.27
4.3.110.0000.0407.27
4.3.100.0070.0277.27
4.3.90.0000.0307.27
4.3.80.0000.0377.27
4.3.70.0030.0437.27
4.3.60.0000.0377.27
4.3.50.0030.0377.27
4.3.40.0000.0407.27
4.3.30.0030.0337.27
4.3.20.0030.0277.27
4.3.10.0030.0337.27
4.3.00.0000.0277.27

preferences:
42.41 ms | 401 KiB | 5 Q