3v4l.org

run code in 300+ PHP versions simultaneously
<?php $User = array( 'Name' => "Hans-Peterµµ", 'Contacts' => array(1, 2, 3, 4, 5, 6, 7, 42), 'Active' => 1 ); $J = json_encode($User); foreach ($J as &$val) { $val = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', function($matches) { return mb_convert_encoding(pack('H*', $matches[1]), 'UTF-8', 'UTF-16'); }, $val); } echo $J;

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)
8.3.60.0070.01118.55
8.3.50.0110.00821.09
8.3.40.0150.00718.89
8.3.30.0030.01019.00
8.3.20.0040.00420.10
8.3.10.0040.00420.53
8.3.00.0050.00319.38
8.2.180.0100.00716.50
8.2.170.0110.00422.96
8.2.160.0070.00720.31
8.2.150.0000.00724.18
8.2.140.0050.00324.66
8.2.130.0070.00026.16
8.2.120.0040.00421.01
8.2.110.0070.00420.94
8.2.100.0080.00418.03
8.2.90.0080.00017.91
8.2.80.0000.00818.09
8.2.70.0000.00817.63
8.2.60.0060.00317.63
8.2.50.0040.00418.07
8.2.40.0040.00418.09
8.2.30.0040.00419.32
8.2.20.0000.00717.62
8.2.10.0050.00318.12
8.2.00.0030.00517.63
8.1.280.0130.00725.92
8.1.270.0080.00023.96
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0040.00423.89
8.1.230.0080.00320.97
8.1.220.0000.00817.78
8.1.210.0000.00818.77
8.1.200.0000.00817.35
8.1.190.0050.00317.36
8.1.180.0000.00819.01
8.1.170.0000.00818.54
8.1.160.0000.00721.94
8.1.150.0050.00218.94
8.1.140.0030.00917.30
8.1.130.0070.00017.94
8.1.120.0040.00417.41
8.1.110.0040.00417.31
8.1.100.0030.00517.35
8.1.90.0040.00417.37
8.1.80.0000.00717.37
8.1.70.0040.00417.38
8.1.60.0080.00017.58
8.1.50.0040.00417.56
8.1.40.0030.00517.43
8.1.30.0000.00817.54
8.1.20.0040.00417.68
8.1.10.0040.00417.45
8.1.00.0000.00817.46
8.0.300.0000.00719.98
8.0.290.0050.00216.75
8.0.280.0030.00318.44
8.0.270.0070.00017.26
8.0.260.0060.00017.20
8.0.250.0000.00717.03
8.0.240.0070.00017.01
8.0.230.0050.00316.93
8.0.220.0030.00316.95
8.0.210.0040.00416.93
8.0.200.0030.00317.04
8.0.190.0030.00617.02
8.0.180.0000.00716.98
8.0.170.0040.00416.97
8.0.160.0000.00716.80
8.0.150.0030.00316.91
8.0.140.0040.00416.87
8.0.130.0050.00013.34
8.0.120.0000.00816.91
8.0.110.0080.00016.87
8.0.100.0040.00417.01
8.0.90.0000.00816.95
8.0.80.0070.01416.91
8.0.70.0040.00416.83
8.0.60.0030.00516.75
8.0.50.0070.00016.84
8.0.30.0100.00817.21
8.0.20.0110.00917.40
8.0.10.0030.00617.00
8.0.00.0090.00916.69
7.4.330.0000.00415.00
7.4.320.0000.00616.42
7.4.300.0000.00616.56
7.4.290.0030.00316.50
7.4.280.0000.00716.59
7.4.270.0030.00316.60
7.4.260.0000.00716.64
7.4.250.0040.00416.46
7.4.240.0050.00216.49
7.4.230.0030.00316.72
7.4.220.0100.00616.69
7.4.210.0080.00616.69
7.4.200.0030.00316.59
7.4.160.0030.01516.48
7.4.150.0130.00717.40
7.4.140.0090.01117.86
7.4.130.0080.01016.51
7.4.120.0050.01316.50
7.4.110.0150.00416.54
7.4.100.0080.00816.28
7.4.90.0070.01016.40
7.4.80.0070.01019.39
7.4.70.0170.00616.46
7.4.60.0070.01316.52
7.4.50.0040.00416.61
7.4.40.0090.00916.64
7.4.30.0090.00916.57
7.4.00.0060.00914.93
7.3.330.0060.00013.17
7.3.320.0000.00513.17
7.3.310.0000.00716.39
7.3.300.0030.00316.25
7.3.290.0070.00716.30
7.3.280.0110.00616.28
7.3.270.0140.00417.40
7.3.260.0120.00616.30
7.3.250.0110.00516.47
7.3.240.0110.00616.37
7.3.230.0070.01016.55
7.3.210.0180.00416.35
7.3.200.0060.01619.39
7.3.190.0080.00816.59
7.3.180.0130.00316.37
7.3.170.0060.00916.43
7.3.160.0030.01216.45
7.3.00.0060.01316.55
7.2.330.0060.01716.48
7.2.320.0120.00916.47
7.2.310.0090.00916.47
7.2.300.0170.00016.50
7.2.290.0070.01016.40
7.2.130.0090.00616.80
7.2.120.0110.00416.53
7.2.110.0070.01116.81
7.2.100.0130.00616.38
7.2.90.0060.00916.40
7.2.80.0110.00716.69
7.2.70.0150.00316.66
7.2.60.0130.00616.65
7.2.50.0070.01016.57
7.2.40.0080.00416.72
7.2.30.0030.01316.75
7.2.20.0070.00716.72
7.2.10.0030.00916.67
7.2.00.0100.00717.84
7.1.250.0070.00715.56
7.1.240.0060.01015.35
7.1.230.0040.01115.46
7.1.220.0120.00315.71
7.1.210.0100.00615.34
7.1.200.0030.01715.76
7.1.190.0070.01115.58
7.1.180.0120.00315.77
7.1.170.0070.00715.61
7.1.160.0090.00315.86
7.1.150.0110.00415.70
7.1.140.0070.00715.82
7.1.130.0060.00915.66
7.1.120.0030.01015.68
7.1.110.0080.00415.44
7.1.100.0070.00516.97
7.1.90.0040.00815.77
7.1.80.0110.00415.65
7.1.70.0030.01116.19
7.1.60.0070.01317.48
7.1.50.0060.01316.43
7.1.40.0090.00315.46
7.1.30.0000.01315.56
7.1.20.0030.00915.80
7.1.10.0000.01415.61
7.1.00.0070.04019.04
7.0.330.0040.00815.23
7.0.320.0040.01115.18
7.0.310.0120.00815.20
7.0.300.0040.00815.11
7.0.290.0150.00915.43
7.0.280.0100.01015.03
7.0.270.0040.01215.45
7.0.260.0100.00315.13
7.0.250.0110.00715.04
7.0.240.0150.00315.17
7.0.230.0060.00615.37
7.0.220.0040.01115.34
7.0.210.0090.00915.17
7.0.200.0270.00714.80
7.0.190.0060.00615.48
7.0.180.0090.00615.42
7.0.170.0110.00415.45
7.0.160.0090.00615.36
7.0.150.0030.01015.08
7.0.140.0040.04118.60
7.0.130.0110.00314.88
7.0.120.0040.00715.22
7.0.110.0170.00015.04
7.0.100.0080.00815.25
7.0.90.0220.02617.61
7.0.80.0240.02217.24
7.0.70.0310.03317.54
7.0.60.0230.02517.30
7.0.50.0230.02317.80
7.0.40.0020.03316.61
7.0.30.0050.04516.79
7.0.20.0090.04116.54
7.0.10.0050.03216.67
7.0.00.0030.02516.65
5.6.380.0100.00314.11
5.6.370.0000.01514.14
5.6.360.0040.00814.43
5.6.350.0070.01014.14
5.6.340.0100.00314.15
5.6.330.0040.00814.01
5.6.320.0130.00014.15
5.6.310.0040.01114.14
5.6.300.0050.00513.95
5.6.290.0130.00313.89
5.6.280.0050.04117.70
5.6.270.0160.00314.14
5.6.260.0170.00214.30
5.6.250.0110.01114.09
5.6.240.0100.02917.31
5.6.230.0070.02217.36
5.6.220.0110.01817.32
5.6.210.0100.02217.41
5.6.200.0070.02517.54
5.6.190.0030.02317.44
5.6.180.0030.03517.48
5.6.170.0080.02517.54
5.6.160.0030.02817.38
5.6.150.0030.02517.43
5.6.140.0040.02217.33
5.6.130.0030.02517.45
5.6.120.0050.03017.56
5.6.110.0040.02017.41
5.6.100.0050.02117.65
5.6.90.0120.01717.64
5.6.80.0140.02917.35
5.6.70.0030.04517.12
5.6.60.0080.04317.21
5.6.50.0090.04217.24
5.6.40.0070.03917.10
5.6.30.0100.04017.20
5.6.20.0060.03517.28
5.6.10.0050.02817.30
5.6.00.0080.04216.99
5.5.380.0030.02715.62
5.5.370.0020.02415.59
5.5.360.0020.03315.46
5.5.350.0030.02415.38
5.5.340.0050.02015.72
5.5.330.0060.03815.75
5.5.320.0100.02015.77
5.5.310.0050.03815.77
5.5.300.0030.02015.83
5.5.290.0080.02215.75
5.5.280.0090.03515.81
5.5.270.0020.02515.91
5.5.260.0010.02315.88
5.5.250.0070.02815.81
5.5.240.0020.04615.56
5.5.230.0060.03615.65
5.5.220.0080.04415.73
5.5.210.0180.02715.49
5.5.200.0030.04515.42
5.5.190.0030.04415.56
5.5.180.0100.03815.56
5.5.170.0000.00811.13
5.5.160.0070.03515.60
5.5.150.0080.03515.60
5.5.140.0050.04215.72
5.5.130.0130.01815.54
5.5.120.0130.02415.43
5.5.110.0070.03015.66
5.5.100.0080.03815.38
5.5.90.0040.04615.28
5.5.80.0030.04415.46
5.5.70.0080.03715.54
5.5.60.0100.01815.48
5.5.50.0070.02515.54
5.5.40.0060.03015.55
5.5.30.0120.03015.46
5.5.20.0070.03915.37
5.5.10.0020.02615.42
5.5.00.0070.02715.44
5.4.450.0070.02215.24
5.4.440.0020.02615.22
5.4.430.0070.02015.28
5.4.420.0060.02115.10
5.4.410.0080.02014.97
5.4.400.0050.02815.00
5.4.390.0060.03815.10
5.4.380.0070.03814.98
5.4.370.0170.03215.05
5.4.360.0050.03815.03
5.4.350.0100.03714.89
5.4.340.0130.03514.82
5.4.330.0030.00610.79
5.4.320.0070.03814.99
5.4.310.0020.04114.80
5.4.300.0080.03515.06
5.4.290.0000.04115.01
5.4.280.0030.04814.85
5.4.270.0020.04514.78
5.4.260.0110.03014.94
5.4.250.0050.04214.78
5.4.240.0050.05214.65
5.4.230.0070.03914.98
5.4.220.0050.02214.85
5.4.210.0140.02414.90
5.4.200.0070.02815.04
5.4.190.0070.02515.06
5.4.180.0030.02514.92
5.4.170.0070.04514.96
5.4.160.0080.03714.95
5.4.150.0060.03914.68
5.4.140.0080.04313.59
5.4.130.0070.03513.69
5.4.120.0090.03713.51
5.4.110.0060.04113.59
5.4.100.0090.03813.63
5.4.90.0060.02713.71
5.4.80.0090.04013.64
5.4.70.0110.03513.65
5.4.60.0080.03513.58
5.4.50.0050.03913.39
5.4.40.0120.03613.64
5.4.30.0080.02813.80
5.4.20.0020.03913.70
5.4.10.0050.04013.69
5.4.00.0020.04413.49
5.3.290.0060.04112.61
5.3.280.0060.01912.54
5.3.270.0100.02412.56
5.3.260.0080.02212.47
5.3.250.0100.02012.59
5.3.240.0100.03812.55
5.3.230.0120.03712.55
5.3.220.0050.03912.50
5.3.210.0090.03612.46
5.3.200.0070.02712.46
5.3.190.0100.02812.61
5.3.180.0030.04012.57
5.3.170.0040.04112.70
5.3.160.0080.02812.56
5.3.150.0050.02712.61
5.3.140.0080.02912.66
5.3.130.0110.03812.59
5.3.120.0090.02912.60
5.3.110.0110.01912.51
5.3.100.0040.04612.31
5.3.90.0080.04112.39
5.3.80.0090.02412.21
5.3.70.0130.03512.33
5.3.60.0070.03112.36
5.3.50.0110.02012.27
5.3.40.0080.04012.33
5.3.30.0170.03012.13
5.3.20.0110.03812.03
5.3.10.0100.02011.98
5.3.00.0080.03711.95
5.2.170.0040.03310.71
5.2.160.0060.03010.70
5.2.150.0050.02010.70
5.2.140.0050.03310.66
5.2.130.0050.02110.69
5.2.120.0050.03010.55
5.2.110.0080.03210.67
5.2.100.0070.02710.70
5.2.90.0040.02010.61
5.2.80.0080.03210.71
5.2.70.0000.04110.67
5.2.60.0060.03010.65
5.2.50.0120.02810.60
5.2.40.0060.03110.58
5.2.30.0030.02810.54
5.2.20.0070.02210.58
5.2.10.0050.03010.58
5.2.00.0080.01810.49
5.1.60.0070.01710.12
5.1.50.0110.02410.12
5.1.40.0060.03010.11
5.1.30.0050.02810.33
5.1.20.0050.02110.26
5.1.10.0080.01310.16
5.1.00.0070.02810.10
5.0.50.0060.0239.40
5.0.40.0040.0249.32
5.0.30.0040.0299.25
5.0.20.0040.0229.22
5.0.10.0030.0189.21
5.0.00.0060.0309.25
4.4.90.0050.0178.81
4.4.80.0020.0208.81
4.4.70.0040.0188.81
4.4.60.0020.0178.81
4.4.50.0010.0218.81
4.4.40.0020.0308.81
4.4.30.0020.0138.81
4.4.20.0020.0198.81
4.4.10.0030.0168.81
4.4.00.0060.0278.81
4.3.110.0020.0218.81
4.3.100.0040.0218.81
4.3.90.0050.0188.81
4.3.80.0040.0268.81
4.3.70.0070.0128.81
4.3.60.0060.0108.81
4.3.50.0050.0138.81
4.3.40.0030.0288.81
4.3.30.0040.0178.81
4.3.20.0000.0198.81
4.3.10.0020.0148.81
4.3.00.0040.0178.81

preferences:
49.13 ms | 401 KiB | 5 Q