3v4l.org

run code in 300+ PHP versions simultaneously
<?php $User = array( 'Name' => "Hans-Peterµµ", 'Contacts' => array(1, 2, 3, 4, 5, 6, 7, 42), 'Active' => 1 ); foreach ($User 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); $J = json_encode($User);} 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)
8.3.60.0180.00418.43
8.3.50.0090.01621.11
8.3.40.0060.01018.68
8.3.30.0000.01419.07
8.3.20.0040.00420.25
8.3.10.0060.00320.79
8.3.00.0040.00419.50
8.2.180.0180.00016.63
8.2.170.0120.00322.96
8.2.160.0070.00720.38
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0000.00826.16
8.2.120.0050.00321.01
8.2.110.0030.00620.51
8.2.100.0080.00318.22
8.2.90.0040.00419.28
8.2.80.0030.00617.97
8.2.70.0040.00417.75
8.2.60.0040.00417.93
8.2.50.0040.00418.07
8.2.40.0000.00818.16
8.2.30.0040.00419.40
8.2.20.0070.00317.85
8.2.10.0060.00318.25
8.2.00.0070.00017.98
8.1.280.0110.00325.92
8.1.270.0060.00324.02
8.1.260.0000.00826.35
8.1.250.0000.00728.09
8.1.240.0030.00623.98
8.1.230.0080.00419.20
8.1.220.0000.00817.77
8.1.210.0040.00418.77
8.1.200.0040.00417.47
8.1.190.0060.00317.38
8.1.180.0060.00318.10
8.1.170.0040.00418.70
8.1.160.0000.00721.93
8.1.150.0040.00418.94
8.1.140.0100.00017.60
8.1.130.0000.00717.86
8.1.120.0050.00317.54
8.1.110.0030.00317.66
8.1.100.0000.00717.61
8.1.90.0030.00317.57
8.1.80.0000.00717.56
8.1.70.0040.00417.55
8.1.60.0040.00417.73
8.1.50.0000.00817.73
8.1.40.0040.00417.62
8.1.30.0050.00317.63
8.1.20.0070.00017.86
8.1.10.0000.00817.68
8.1.00.0040.00417.50
8.0.300.0000.00718.77
8.0.290.0040.00416.75
8.0.280.0000.00718.41
8.0.270.0030.00417.32
8.0.260.0040.00417.16
8.0.250.0000.00717.02
8.0.240.0000.00717.15
8.0.230.0000.00717.12
8.0.220.0080.00017.10
8.0.210.0000.00717.05
8.0.200.0030.00317.07
8.0.190.0070.00317.11
8.0.180.0000.00817.09
8.0.170.0020.00517.02
8.0.160.0000.00716.89
8.0.150.0000.00717.03
8.0.140.0000.00816.92
8.0.130.0030.00313.40
8.0.120.0000.00916.93
8.0.110.0000.00816.93
8.0.100.0000.00816.93
8.0.90.0040.00416.90
8.0.80.0060.01517.01
8.0.70.0000.00717.08
8.0.60.0000.00816.97
8.0.50.0030.00617.02
8.0.30.0090.00917.38
8.0.20.0120.00617.42
8.0.10.0030.00517.04
8.0.00.0070.01017.06
7.4.330.0020.00215.00
7.4.320.0030.00316.78
7.4.300.0000.00616.80
7.4.290.0070.00016.74
7.4.280.0050.00216.72
7.4.270.0070.00016.67
7.4.260.0040.00416.70
7.4.250.0050.00316.76
7.4.240.0020.00516.78
7.4.230.0030.00516.77
7.4.220.0180.00916.89
7.4.210.0070.00716.79
7.4.200.0070.00016.70
7.4.160.0100.00716.70
7.4.150.0140.01117.40
7.4.140.0070.01417.86
7.4.130.0110.00616.75
7.4.120.0060.01116.82
7.4.110.0160.00016.46
7.4.100.0080.00816.66
7.4.90.0120.00616.96
7.4.80.0120.00619.39
7.4.70.0130.00616.76
7.4.60.0110.00716.64
7.4.50.0040.00416.95
7.4.40.0060.01416.46
7.4.30.0040.01216.86
7.4.00.0050.01015.17
7.3.330.0000.00513.31
7.3.320.0030.00313.40
7.3.310.0030.00316.39
7.3.300.0030.00316.46
7.3.290.0090.00616.48
7.3.280.0070.00716.45
7.3.270.0120.00617.40
7.3.260.0140.00716.48
7.3.250.0110.00616.57
7.3.240.0090.00916.88
7.3.230.0070.01416.50
7.3.210.0210.00416.46
7.3.200.0110.01119.39
7.3.190.0090.01316.54
7.3.180.0100.00616.71
7.3.170.0070.01116.53
7.3.160.0070.01016.85
7.3.120.0100.00714.95
7.3.110.0070.01114.88
7.3.100.0070.00715.07
7.3.90.0040.01115.20
7.3.80.0070.00714.85
7.3.70.0030.00914.97
7.3.60.0040.00715.04
7.3.50.0000.01815.04
7.3.40.0080.00515.05
7.3.30.0100.00714.68
7.3.20.0100.00716.78
7.3.10.0090.00316.76
7.3.00.0030.00916.89
7.2.330.0120.00616.86
7.2.320.0100.01016.96
7.2.310.0100.00716.98
7.2.300.0060.01016.78
7.2.290.0060.01116.90
7.2.250.0170.00314.94
7.2.240.0060.01215.07
7.2.230.0060.00915.09
7.2.220.0060.01215.24
7.2.210.0030.01215.00
7.2.200.0110.00315.15
7.2.190.0080.00815.24
7.2.180.0070.00715.34
7.2.170.0110.00614.90
7.1.330.0070.00715.87
7.1.320.0030.01016.20
7.1.310.0040.01115.74
7.1.300.0030.00915.68
7.1.290.0060.00615.92
7.1.280.0060.00916.00
7.1.270.0030.01415.91
7.1.260.0100.00615.75
7.1.70.0030.00717.53
7.1.60.0110.01419.61
7.1.50.0040.01516.90
7.1.00.0070.07022.47
7.0.200.0110.00315.12
7.0.140.0070.06722.21
7.0.90.0030.08020.14
7.0.80.0630.08719.90
7.0.70.0500.08020.03
7.0.60.0670.06019.96
7.0.50.0270.08020.36
7.0.40.0070.04019.96
7.0.30.0030.05020.09
7.0.20.0030.04319.95
7.0.10.0100.04020.07
7.0.00.0100.03720.18
5.6.280.0030.07320.82
5.6.240.0100.07720.60
5.6.230.0130.07720.57
5.6.220.0070.08320.66
5.6.210.0100.07020.77
5.6.200.0230.06721.03
5.6.190.0230.05321.07
5.6.180.0030.04321.04
5.6.170.0030.04321.04
5.6.160.0030.04021.18
5.6.150.0000.04321.02
5.6.140.0000.04721.07
5.6.130.0000.06721.16
5.6.120.0130.03320.96
5.6.110.0070.08321.09
5.6.100.0030.08321.01
5.6.90.0000.07021.06
5.6.80.0130.03020.41
5.6.70.0100.03320.44
5.6.60.0100.03320.50
5.6.50.0130.03020.52
5.6.40.0000.05020.39
5.6.30.0070.03320.25
5.6.20.0070.03720.44
5.6.10.0000.04320.53
5.6.00.0070.03720.38
5.5.380.0130.07720.35
5.5.370.0070.06320.38
5.5.360.0130.08720.55
5.5.350.0130.07720.43
5.5.340.0130.07720.88
5.5.330.0130.04020.91
5.5.320.0030.04320.64
5.5.310.0000.04720.77
5.5.300.0000.04320.89
5.5.290.0030.04320.92
5.5.280.0030.05020.64
5.5.270.0030.08720.82
5.5.260.0070.05720.72
5.5.250.0070.04720.71
5.5.240.0030.04020.21
5.5.230.0030.04020.30
5.5.220.0000.04320.25
5.5.210.0100.03320.21
5.5.200.0030.03720.16
5.5.190.0070.03720.18
5.5.180.0030.04020.11
5.5.160.0030.04320.08
5.5.150.0030.04720.18
5.5.140.0030.05320.23
5.5.130.0170.02720.20
5.5.120.0000.04319.97
5.5.110.0030.04019.98
5.5.100.0100.05320.13
5.5.90.0030.03720.16
5.5.80.0030.03720.15
5.5.70.0000.04320.15
5.5.60.0030.04320.05
5.5.50.0030.04020.16
5.5.40.0000.04020.02
5.5.30.0070.05720.01
5.5.20.0100.07319.96
5.5.10.0070.06020.11
5.5.00.0130.07320.06
5.4.450.0070.03719.46
5.4.440.0030.08019.36
5.4.430.0030.07019.35
5.4.420.0000.04319.41
5.4.410.0000.04019.23
5.4.400.0100.04719.13
5.4.390.0000.04019.21
5.4.380.0000.03719.16
5.4.370.0000.05319.04
5.4.360.0000.04019.25
5.4.350.0030.03719.14
5.4.340.0070.04019.09
5.4.320.0130.02718.94
5.4.310.0070.06719.04
5.4.300.0030.03719.12
5.4.290.0000.03719.06
5.4.280.0000.04319.09
5.4.270.0070.03718.93
5.4.260.0000.04318.84
5.4.250.0130.02318.87
5.4.240.0070.05019.13
5.4.230.0030.04719.03
5.4.220.0030.04019.08
5.4.210.0030.03719.04
5.4.200.0100.04318.84
5.4.190.0070.07319.02
5.4.180.0070.04718.91
5.4.170.0070.03719.04
5.4.160.0070.08019.00
5.4.150.0070.07318.86
5.4.140.0130.06716.20
5.4.130.0070.03716.45
5.4.120.0070.07316.28
5.4.110.0000.08016.47
5.4.100.0170.06316.39
5.4.90.0100.04016.43
5.4.80.0100.06316.41
5.4.70.0070.06316.33
5.4.60.0100.04016.48
5.4.50.0130.04016.36
5.4.40.0030.07016.51
5.4.30.0070.07016.23
5.4.20.0170.03716.30
5.4.10.0030.08016.36
5.4.00.0030.05015.73
5.3.290.0030.04714.67
5.3.280.0000.04314.63
5.3.270.0100.03314.64
5.3.260.0070.06714.67
5.3.250.0000.08014.66
5.3.240.0100.05314.58
5.3.230.0130.04714.73
5.3.220.0100.07714.59
5.3.210.0100.07314.63
5.3.200.0030.07714.66
5.3.190.0070.07314.57
5.3.180.0030.05014.62
5.3.170.0030.06714.57
5.3.160.0070.07314.63
5.3.150.0070.04714.65
5.3.140.0000.04314.57
5.3.130.0070.05014.64
5.3.120.0130.05714.58
5.3.110.0000.08314.53
5.3.100.0100.07314.04
5.3.90.0170.06714.02
5.3.80.0100.07713.93
5.3.70.0170.06314.13
5.3.60.0070.07014.05
5.3.50.0030.07313.94
5.3.40.0000.05714.04
5.3.30.0100.06313.93
5.3.20.0070.07013.82
5.3.10.0070.07313.58
5.3.00.0100.04013.57
5.2.170.0030.06311.10
5.2.160.0030.04311.06
5.2.150.0030.04011.14
5.2.140.0030.06010.93
5.2.130.0070.06010.93
5.2.120.0030.03310.89
5.2.110.0100.05711.05
5.2.100.0130.05710.92
5.2.90.0030.06310.95
5.2.80.0200.04011.02
5.2.70.0100.05711.03
5.2.60.0030.06010.87
5.2.50.0070.04010.98
5.2.40.0070.04010.84
5.2.30.0000.06010.91
5.2.20.0070.03010.88
5.2.10.0000.06010.76
5.2.00.0030.04010.76
5.1.60.0030.0579.98
5.1.50.0030.05010.04
5.1.40.0000.05710.01
5.1.30.0000.04010.39
5.1.20.0030.03010.42
5.1.10.0030.05310.07
5.1.00.0000.02710.11
5.0.50.0100.0408.61
5.0.40.0030.0408.39
5.0.30.0000.0638.03
5.0.20.0100.0338.31
5.0.10.0070.0408.15
5.0.00.0070.0478.25
4.4.90.0030.0337.55
4.4.80.0000.0337.55
4.4.70.0000.0407.55
4.4.60.0000.0307.55
4.4.50.0000.0377.55
4.4.40.0000.0537.55
4.4.30.0000.0277.55
4.4.20.0000.0207.55
4.4.10.0000.0207.55
4.4.00.0000.0277.55
4.3.110.0130.0237.55
4.3.100.0030.0337.55
4.3.90.0030.0237.55
4.3.80.0100.0477.55
4.3.70.0030.0237.55
4.3.60.0030.0337.55
4.3.50.0030.0337.55
4.3.40.0000.0537.55
4.3.30.0000.0377.55
4.3.20.0000.0377.55
4.3.10.0030.0337.55
4.3.00.0000.0307.55

preferences:
39.43 ms | 401 KiB | 5 Q