3v4l.org

run code in 300+ PHP versions simultaneously
<?php $number = 15; $packed = pack('h*', dechex($number)); $v = unpack('h*', $packed); $v = hexdec($v[1]); var_dump($packed); var_dump($number); var_dump($v);

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)
8.3.70.0100.01016.50
8.3.60.0110.00716.75
8.3.50.0100.00716.47
8.3.40.0100.00718.72
8.3.30.0070.00718.66
8.3.20.0040.00418.48
8.3.10.0060.00318.66
8.3.00.0000.00819.13
8.2.180.0120.00316.38
8.2.170.0100.01022.96
8.2.160.0030.01218.96
8.2.150.0060.00324.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0060.00319.78
8.2.110.0060.00321.04
8.2.100.0000.01217.88
8.2.90.0090.00019.21
8.2.80.0040.00417.97
8.2.70.0000.00817.50
8.2.60.0000.00817.80
8.2.50.0060.00318.04
8.2.40.0000.00819.35
8.2.30.0030.00617.56
8.2.20.0040.00417.55
8.2.10.0030.00617.60
8.2.00.0040.00417.58
8.1.280.0110.00725.92
8.1.270.0040.00423.99
8.1.260.0030.00526.35
8.1.250.0070.00028.09
8.1.240.0060.00322.69
8.1.230.0080.00317.89
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0000.00817.23
8.1.190.0090.00017.22
8.1.180.0040.00418.10
8.1.170.0040.00417.62
8.1.160.0040.00419.01
8.1.150.0090.00018.48
8.1.140.0000.00717.30
8.1.130.0000.00717.36
8.1.120.0050.00217.37
8.1.110.0040.00417.32
8.1.100.0040.00417.43
8.1.90.0040.00417.40
8.1.80.0030.00317.34
8.1.70.0070.00017.41
8.1.60.0050.00217.38
8.1.50.0040.00417.27
8.1.40.0050.00317.46
8.1.30.0020.00517.46
8.1.20.0000.01017.48
8.1.10.0080.00017.49
8.1.00.0070.00017.32
8.0.300.0070.00018.77
8.0.290.0050.00216.63
8.0.280.0040.00418.60
8.0.270.0000.00717.18
8.0.260.0030.00316.72
8.0.250.0040.00416.89
8.0.240.0000.00916.83
8.0.230.0030.00616.90
8.0.220.0070.00016.80
8.0.210.0000.00716.80
8.0.200.0000.00716.93
8.0.190.0040.00416.86
8.0.180.0040.00416.86
8.0.170.0000.00816.81
8.0.160.0000.00716.88
8.0.150.0080.00016.73
8.0.140.0070.00316.80
8.0.130.0030.00313.20
8.0.120.0030.00616.70
8.0.110.0040.00416.91
8.0.100.0080.00016.71
8.0.90.0070.00016.63
8.0.80.0040.01816.76
8.0.70.0070.00016.77
8.0.60.0040.00416.69
8.0.50.0040.00416.80
8.0.30.0180.00017.24
8.0.20.0080.01016.79
8.0.10.0050.00216.80
8.0.00.0130.00816.64
7.4.330.0000.00612.90
7.4.320.0030.00316.55
7.4.300.0070.00016.38
7.4.290.0060.00016.54
7.4.280.0030.00416.39
7.4.270.0030.00316.51
7.4.260.0050.00013.23
7.4.250.0080.00016.41
7.4.240.0000.00716.45
7.4.230.0030.00316.54
7.4.220.0130.00616.38
7.4.210.0000.01316.35
7.4.200.0050.00216.41
7.4.190.0060.00316.69
7.4.160.0170.00316.36
7.4.150.0100.00716.41
7.4.140.0120.00617.86
7.4.130.0140.00316.32
7.4.120.0180.00616.41
7.4.110.0130.00316.58
7.4.100.0090.01216.46
7.4.90.0130.01016.63
7.4.80.0050.01619.39
7.4.70.0040.01316.27
7.4.60.0140.00316.51
7.4.50.0000.00816.55
7.4.40.0110.00416.28
7.4.30.0080.00816.40
7.4.00.0090.00814.65
7.3.330.0050.00213.10
7.3.320.0050.00313.07
7.3.310.0000.00716.22
7.3.300.0000.00716.23
7.3.290.0060.00916.22
7.3.280.0070.00716.10
7.3.270.0070.01016.21
7.3.260.0060.01116.20
7.3.240.0080.00816.42
7.3.230.0120.00416.48
7.3.210.0060.01216.20
7.3.200.0040.01716.21
7.3.190.0090.00616.32
7.3.180.0080.00816.18
7.3.170.0090.01416.19
7.3.160.0100.00716.21
7.3.120.0080.00614.64
7.3.110.0080.00814.54
7.3.100.0120.00614.72
7.3.90.0070.01014.65
7.3.80.0060.01014.78
7.3.70.0000.01514.54
7.3.60.0060.00614.79
7.3.50.0060.00314.71
7.3.40.0060.00914.48
7.3.30.0000.01414.47
7.3.20.0040.01116.43
7.3.10.0060.00616.66
7.3.00.0070.00716.62
7.2.330.0050.01316.62
7.2.320.0100.01016.58
7.2.310.0040.02016.25
7.2.300.0070.01416.25
7.2.290.0100.01316.57
7.2.250.0060.01014.71
7.2.240.0080.00814.87
7.2.230.0040.01114.64
7.2.220.0040.01114.64
7.2.210.0090.00615.14
7.2.200.0030.01014.61
7.2.190.0030.00614.56
7.2.180.0100.00714.93
7.2.170.0070.00714.93
7.2.00.0030.01419.27
7.1.330.0040.01115.85
7.1.320.0000.01315.70
7.1.310.0070.01015.84
7.1.300.0060.00915.86
7.1.290.0070.00715.89
7.1.280.0030.00615.73
7.1.270.0060.00615.86
7.1.260.0060.00615.83
7.1.100.0040.01218.25
7.1.70.0030.00917.20
7.1.60.0100.01319.21
7.1.50.0090.01516.58
7.1.00.0030.04322.36
7.0.200.0000.00916.80
7.0.140.0000.07722.15
7.0.120.0100.05722.05
7.0.60.0130.08019.93
7.0.50.0100.07717.81
7.0.40.0070.08320.12
7.0.30.0130.04720.17
7.0.20.0370.07720.30
7.0.10.0100.04320.30
7.0.00.0070.06720.19
5.6.280.0100.06721.03
5.6.210.0070.08720.74
5.6.200.0070.07318.21
5.6.190.0100.07020.67
5.6.180.0270.04020.67
5.6.170.0200.04320.35
5.6.160.0100.08020.40
5.6.150.0100.07018.16
5.6.140.0000.04718.13
5.6.130.0100.06018.11
5.6.120.0070.08321.13
5.6.110.0130.07021.01
5.6.100.0130.08020.96
5.6.90.0070.08720.96
5.6.80.0000.04020.38
5.5.350.0300.07720.32
5.5.340.0030.07017.91
5.5.330.0100.08320.07
5.5.320.0330.04320.29
5.5.310.0330.06320.27
5.5.300.0100.07017.97
5.5.290.0070.03717.95
5.5.280.0030.06020.86
5.5.270.0130.05020.75
5.5.260.0070.08020.97
5.5.250.0070.05320.60
5.5.240.0030.06020.27
5.4.450.1700.04019.11
5.4.440.1870.04019.43
5.4.430.1730.03719.45
5.4.420.1970.03719.56
5.4.410.1670.04019.28
5.4.400.1870.03719.09
5.4.390.1800.04319.15
5.4.380.2030.04319.13
5.4.370.1670.04319.13
5.4.360.1870.04719.10
5.4.350.1930.03719.21
5.4.340.1700.03719.06
5.4.320.1700.03719.28
5.4.310.1830.04319.22
5.4.300.1730.03719.04
5.4.290.1700.03719.09
5.4.280.1630.04319.21
5.4.270.1700.04019.07
5.4.260.1730.04019.24
5.4.250.1900.03719.13
5.4.240.2030.04018.77
5.4.230.1800.03319.04
5.4.220.1930.04019.08
5.4.210.1930.04719.15
5.4.200.1900.04718.91
5.4.190.1830.05019.04
5.4.180.1800.04719.12
5.4.170.1770.04719.20
5.4.160.1570.04718.75
5.4.150.1670.03718.75
5.4.140.1800.04716.45
5.4.130.1470.04016.30
5.4.120.1930.04716.18
5.4.110.1870.03316.18
5.4.100.1870.03716.48
5.4.90.1830.04716.23
5.4.80.1730.03316.19
5.4.70.1700.03316.44
5.4.60.1670.02716.21
5.4.50.1670.03716.46
5.4.40.1500.04016.45
5.4.30.1900.03716.36
5.4.20.1530.03716.38
5.4.10.1670.03316.39
5.4.00.1670.03315.91
5.3.290.1500.04014.63
5.3.280.0900.03714.43
5.3.270.0030.04014.55
5.3.260.0070.07714.43
5.3.250.1600.03714.44
5.3.240.2100.04314.65
5.3.230.2000.04714.44
5.3.220.1830.03714.39
5.3.210.1630.03314.66
5.3.200.1830.04314.44
5.3.190.1670.03714.51
5.3.180.1670.03714.61
5.3.170.1500.04014.51
5.3.160.1670.03714.65
5.3.150.1700.03714.41
5.3.140.1470.04314.60
5.3.130.1670.03314.42
5.3.120.1570.03314.39
5.3.110.1730.03014.38
5.3.100.2100.04714.00
5.3.90.1330.05014.00
5.3.80.1700.03313.91
5.3.70.1500.04013.85
5.3.60.1670.03713.83
5.3.50.1600.03013.88
5.3.40.2330.03713.74
5.3.30.1730.03313.79
5.3.20.1730.03313.55
5.3.10.1530.03713.56
5.3.00.1670.03013.73
5.2.170.1670.03011.16
5.2.160.1370.02710.99
5.2.150.1670.03011.19
5.2.140.1600.03711.08
5.2.130.1630.03711.18
5.2.120.1530.04011.17
5.2.110.1630.02711.15
5.2.100.1630.03710.96
5.2.90.1370.02711.18
5.2.80.1600.03311.14
5.2.70.1630.02711.17
5.2.60.1430.02710.89
5.2.50.1630.04310.86
5.2.40.1370.03010.82
5.2.30.1200.03010.80
5.2.20.1200.03010.79
5.2.10.1200.02310.82
5.2.00.1330.03310.68
5.1.60.1100.0279.96
5.1.50.1100.0279.93
5.1.40.1270.0279.84
5.1.30.1130.02710.23
5.1.20.1470.03010.40
5.1.10.1170.03010.07
5.1.00.1170.02010.00
5.0.50.0600.0208.48
5.0.40.0630.0138.50
5.0.30.0570.0338.20
5.0.20.0630.0138.36
5.0.10.0600.0178.05
5.0.00.0530.0338.13
4.4.90.0730.0237.88
4.4.80.0530.0177.88
4.4.70.0670.0207.88
4.4.60.0570.0177.88
4.4.50.0530.0177.88
4.4.40.0770.0377.88
4.4.30.0570.0207.88
4.4.20.0570.0177.88
4.4.10.0570.0207.88
4.4.00.0670.0307.88
4.3.110.0630.0107.88
4.3.100.0830.0177.88
4.3.90.0600.0137.88
4.3.80.0630.0337.88
4.3.70.0730.0177.88
4.3.60.0570.0177.88
4.3.50.0830.0137.88
4.3.40.0670.0337.88
4.3.30.0370.0337.88
4.3.20.0430.0277.88
4.3.10.0400.0337.88
4.3.00.0330.0237.88

preferences:
54.93 ms | 401 KiB | 5 Q