3v4l.org

run code in 300+ PHP versions simultaneously
<?php function replace_unicode_escape_sequence($match) { return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE'); } $str = "Bal\u00edky"; $str = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str); echo $str;

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)
8.3.60.0110.00416.75
8.3.50.0150.00321.94
8.3.40.0070.01619.03
8.3.30.0120.00918.83
8.3.20.0090.00620.34
8.3.10.0040.00423.65
8.3.00.0040.00419.21
8.2.180.0120.00316.63
8.2.170.0120.00622.96
8.2.160.0070.00720.54
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0090.00026.16
8.2.120.0050.00320.83
8.2.110.0060.00320.29
8.2.100.0110.00017.97
8.2.90.0060.00319.21
8.2.80.0040.00418.00
8.2.70.0080.00017.88
8.2.60.0040.00418.18
8.2.50.0060.00318.07
8.2.40.0080.00020.00
8.2.30.0000.00718.39
8.2.20.0040.00417.96
8.2.10.0040.00418.13
8.2.00.0040.00417.84
8.1.280.0170.00325.92
8.1.270.0040.00422.02
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0080.00023.97
8.1.230.0060.00617.52
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0070.00317.48
8.1.190.0000.00817.36
8.1.180.0030.00518.10
8.1.170.0000.00818.71
8.1.160.0050.00222.03
8.1.150.0070.00018.80
8.1.140.0040.00417.52
8.1.130.0030.00317.77
8.1.120.0080.00017.52
8.1.110.0030.00417.46
8.1.100.0050.00317.67
8.1.90.0080.00017.65
8.1.80.0070.00017.62
8.1.70.0000.00717.55
8.1.60.0030.00617.75
8.1.50.0040.00417.71
8.1.40.0030.00617.58
8.1.30.0050.00517.77
8.1.20.0040.00417.87
8.1.10.0050.00317.77
8.1.00.0040.00417.70
8.0.300.0040.00418.77
8.0.290.0000.00716.88
8.0.280.0040.00418.53
8.0.270.0030.00317.26
8.0.260.0060.00017.39
8.0.250.0050.00217.14
8.0.240.0060.00317.18
8.0.230.0030.00317.12
8.0.220.0070.00017.05
8.0.210.0050.00316.97
8.0.200.0000.00617.14
8.0.190.0000.00817.02
8.0.180.0000.00716.98
8.0.170.0030.00516.97
8.0.160.0040.00416.92
8.0.150.0070.00017.06
8.0.140.0040.00416.94
8.0.130.0000.00813.46
8.0.120.0070.00017.06
8.0.110.0000.00817.00
8.0.100.0040.00417.15
8.0.90.0030.00517.14
8.0.80.0060.01217.02
8.0.70.0050.00217.02
8.0.60.0040.00416.91
8.0.50.0040.00416.87
8.0.30.0100.01117.43
8.0.20.0120.00617.40
8.0.10.0070.00017.04
8.0.00.0140.00316.84
7.4.330.0000.00515.09
7.4.320.0060.00016.82
7.4.300.0030.00316.72
7.4.290.0000.00816.77
7.4.280.0040.00416.70
7.4.270.0070.00016.80
7.4.260.0030.00316.72
7.4.250.0040.00416.79
7.4.240.0040.00416.78
7.4.230.0030.00316.82
7.4.220.0060.01916.83
7.4.210.0140.00416.77
7.4.200.0000.00716.77
7.4.160.0030.01316.81
7.4.150.0090.01617.40
7.4.140.0080.00917.86
7.4.130.0110.00616.52
7.4.120.0130.00316.69
7.4.110.0160.00616.70
7.4.100.0150.00916.59
7.4.90.0070.01016.47
7.4.80.0100.01319.39
7.4.70.0070.01516.54
7.4.60.0080.00816.51
7.4.50.0000.00416.77
7.4.40.0100.00616.59
7.4.30.0110.00416.73
7.4.00.0120.00314.92
7.3.330.0000.00813.39
7.3.320.0030.00313.26
7.3.310.0030.00316.37
7.3.300.0000.00716.38
7.3.290.0100.00516.48
7.3.280.0090.00916.49
7.3.270.0070.01017.40
7.3.260.0150.00316.65
7.3.250.0130.00616.61
7.3.240.0070.01016.71
7.3.230.0100.00616.41
7.3.210.0090.00916.59
7.3.200.0110.02119.39
7.3.190.0030.01816.60
7.3.180.0110.00416.40
7.3.170.0130.00316.66
7.3.160.0140.00916.80
7.3.120.0030.00914.85
7.3.00.0110.00016.77
7.2.330.0120.00616.73
7.2.320.0040.01316.73
7.2.310.0030.01716.93
7.2.300.0130.00316.91
7.2.290.0030.01516.66
7.2.130.0040.01216.92
7.2.120.0030.01016.70
7.2.110.0000.01317.15
7.2.100.0030.00917.22
7.2.90.0080.00416.80
7.2.80.0120.00317.02
7.2.70.0040.00416.93
7.2.60.0050.01016.93
7.2.50.0120.00616.98
7.2.40.0000.01417.07
7.2.30.0070.00716.79
7.2.20.0090.00317.00
7.2.10.0030.00916.86
7.2.00.0050.00718.36
7.1.250.0070.00715.93
7.1.240.0040.00715.97
7.1.230.0060.00616.05
7.1.220.0040.00816.04
7.1.210.0070.00715.87
7.1.200.0020.00715.89
7.1.190.0060.00915.83
7.1.180.0070.00715.81
7.1.170.0060.00315.95
7.1.160.0070.00716.04
7.1.150.0050.00515.95
7.1.140.0070.00415.98
7.1.130.0000.01316.04
7.1.120.0040.01215.80
7.1.110.0060.00615.97
7.1.100.0030.00817.10
7.1.90.0040.00715.79
7.1.80.0060.00315.93
7.1.70.0070.00516.38
7.1.60.0050.00716.68
7.1.50.0050.00816.55
7.1.40.0000.01015.73
7.1.30.0030.01015.88
7.1.20.0030.00915.97
7.1.10.0060.00615.93
7.1.00.0050.04019.16
7.0.330.0040.00415.32
7.0.320.0030.00715.40
7.0.310.0040.01115.57
7.0.300.0090.00315.36
7.0.290.0100.00015.63
7.0.280.0030.00615.68
7.0.270.0060.00615.42
7.0.260.0060.00315.25
7.0.250.0000.00815.40
7.0.240.0080.00415.50
7.0.230.0070.00315.46
7.0.220.0000.00815.51
7.0.210.0030.00715.41
7.0.200.0060.00816.36
7.0.190.0030.00615.42
7.0.180.0000.01315.54
7.0.170.0090.00315.51
7.0.160.0000.00915.47
7.0.150.0000.01015.49
7.0.140.0090.03618.79
7.0.130.0060.00615.68
7.0.120.0110.00015.68
7.0.110.0070.00315.65
7.0.100.0070.00315.32
7.0.90.0030.00715.46
7.0.80.0000.01115.75
7.0.70.0030.00715.76
7.0.60.0100.03718.60
7.0.50.0100.03816.80
7.0.40.0100.03916.80
7.0.30.0230.03316.78
7.0.20.0200.04016.82
7.0.10.0020.03016.91
7.0.00.0070.04517.00
5.6.380.0000.01014.39
5.6.370.0060.00614.30
5.6.360.0040.00414.23
5.6.350.0040.00714.62
5.6.340.0030.00914.30
5.6.330.0110.00414.30
5.6.320.0030.00914.17
5.6.310.0040.01214.64
5.6.300.0060.00314.10
5.6.290.0000.01114.25
5.6.280.0070.03717.66
5.6.270.0070.00714.31
5.6.260.0070.00714.71
5.6.250.0070.00714.34
5.6.240.0000.01114.29
5.6.230.0070.00314.40
5.6.220.0070.00714.18
5.6.210.0090.03517.53
5.6.200.0090.04116.28
5.6.190.0030.02417.34
5.6.180.0270.02317.45
5.6.170.0130.02517.59
5.6.160.0050.02817.36
5.6.150.0060.02216.27
5.6.140.0110.03816.33
5.6.130.0030.02616.35
5.6.120.0080.02017.63
5.6.110.0070.04217.79
5.6.100.0050.04517.62
5.6.90.0060.03317.92
5.6.80.0060.02117.23
5.6.70.0030.00714.23
5.6.60.0060.00614.27
5.6.50.0060.00614.41
5.6.40.0030.00814.46
5.6.30.0070.00314.29
5.6.20.0060.00614.41
5.6.10.0070.00714.29
5.6.00.0040.00414.05
5.5.380.0070.00011.13
5.5.370.0000.00811.41
5.5.360.0040.00411.30
5.5.350.0050.02315.86
5.5.340.0070.04314.61
5.5.330.0050.02215.99
5.5.320.0120.04515.59
5.5.310.0120.03015.82
5.5.300.0050.02314.56
5.5.290.0030.02914.57
5.5.280.0080.04115.93
5.5.270.0070.04015.89
5.5.260.0070.04416.00
5.5.250.0080.04015.88
5.5.240.0000.02715.68
5.5.230.0000.01110.78
5.5.220.0040.00411.21
5.5.210.0030.00611.07
5.5.200.0000.00811.17
5.5.190.0030.00311.14
5.5.180.0060.00310.99
5.5.170.0060.00011.24
5.5.160.0000.00911.21
5.5.150.0000.00811.13
5.5.140.0000.00711.09
5.5.130.0050.00211.18
5.5.120.0000.00611.02
5.5.110.0090.00011.11
5.5.100.0040.00810.85
5.5.90.0070.00010.89
5.5.80.0000.00711.17
5.5.70.0070.00311.11
5.5.60.0040.00411.20
5.5.50.0000.00911.02
5.5.40.0100.00011.11
5.5.30.0030.00611.29
5.5.20.0090.00310.98
5.5.10.0000.00711.14
5.5.00.0050.00211.38
5.4.450.1930.02215.35
5.4.440.1350.02615.38
5.4.430.1950.02015.19
5.4.420.1900.02115.30
5.4.410.1900.02415.21
5.4.400.1890.01815.10
5.4.390.1910.02315.28
5.4.380.2150.02514.93
5.4.370.1910.01815.19
5.4.360.2030.01815.12
5.4.350.2020.02315.05
5.4.340.1980.01614.89
5.4.330.0070.00310.63
5.4.320.1980.02015.14
5.4.310.1880.01815.08
5.4.300.1870.01815.17
5.4.290.1890.01915.06
5.4.280.2100.02415.23
5.4.270.2020.01915.00
5.4.260.2150.01715.11
5.4.250.1980.02314.96
5.4.240.1730.02515.02
5.4.230.1880.02115.28
5.4.220.1970.02315.15
5.4.210.1950.02315.01
5.4.200.1700.02015.17
5.4.190.2490.02114.95
5.4.180.2030.01815.05
5.4.170.2120.02015.16
5.4.160.2080.02415.06
5.4.150.1840.02215.14
5.4.140.1950.02013.87
5.4.130.2000.02313.88
5.4.120.2020.02713.81
5.4.110.1980.02113.85
5.4.100.1970.02113.83
5.4.90.1970.02013.83
5.4.80.1800.02313.78
5.4.70.1980.01813.85
5.4.60.1980.01813.99
5.4.50.2400.02413.63
5.4.40.1970.02013.87
5.4.30.2000.01713.85
5.4.20.1990.01713.69
5.4.10.2170.01713.94
5.4.00.2050.02113.54
5.3.290.1870.02212.78
5.3.280.1870.01912.57
5.3.270.2000.02512.68
5.3.260.2030.02212.58
5.3.250.1950.01812.59
5.3.240.1900.01812.63
5.3.230.1930.02412.60
5.3.220.1810.02212.59
5.3.210.1860.02012.61
5.3.200.1840.02012.51
5.3.190.1950.02212.60
5.3.180.1930.02412.62
5.3.170.2110.02012.69
5.3.160.2190.02012.63
5.3.150.2330.01812.50
5.3.140.2940.02412.54
5.3.130.1950.02212.52
5.3.120.2030.02412.59
5.3.110.2100.02012.44
5.3.100.2250.02212.40
5.3.90.2360.02212.43
5.3.80.1930.02112.23
5.3.70.2000.01712.18
5.3.60.1800.02412.19
5.3.50.1840.02212.26
5.3.40.1850.01812.22
5.3.30.1800.02112.11
5.3.20.2020.02112.18
5.3.10.2050.01911.93
5.3.00.1380.01712.12
5.2.170.1540.01810.52
5.2.160.1570.01310.51
5.2.150.1520.01710.51
5.2.140.1660.01310.56
5.2.130.1700.01610.54
5.2.120.1590.01610.52
5.2.110.1220.01810.57
5.2.100.0900.01910.57
5.2.90.1090.01310.54
5.2.80.1370.01810.54
5.2.70.1500.01910.55
5.2.60.1550.01510.53
5.2.50.1520.01710.49
5.2.40.1380.01710.46
5.2.30.1350.01810.55
5.2.20.1180.01510.55
5.2.10.1200.01510.42
5.2.00.1270.01410.34
5.1.60.1260.0169.98
5.1.50.1130.01310.00
5.1.40.1180.0159.96
5.1.30.1300.01210.11
5.1.20.1230.01610.14
5.1.10.1080.01410.00
5.1.00.1200.0139.97
5.0.50.0650.0129.33
5.0.40.0690.0109.17
5.0.30.0770.0199.07
5.0.20.0720.0129.12
5.0.10.0570.0129.10
5.0.00.0870.0209.08
4.4.90.0680.0108.02
4.4.80.0600.0118.02
4.4.70.0650.0088.02
4.4.60.0610.0108.02
4.4.50.0600.0128.02
4.4.40.0550.0148.02
4.4.30.0620.0118.02
4.4.20.0550.0078.02
4.4.10.0730.0128.02
4.4.00.0700.0148.02
4.3.110.0670.0088.02
4.3.100.0720.0108.02
4.3.90.0670.0128.02
4.3.80.0960.0178.02
4.3.70.0920.0138.02
4.3.60.0890.0098.02
4.3.50.0750.0088.02
4.3.40.0770.0148.02
4.3.30.0380.0148.02
4.3.20.0320.0108.02
4.3.10.0420.0148.02
4.3.00.0420.0128.02

preferences:
37.84 ms | 401 KiB | 5 Q