3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'Hello World!'; var_dump(\unpack('A16', \pack('A16', $str))[1]); // Decoding "space padded string" strips added spaces var_dump(\unpack('a16', \pack('a16', $str))[1]); // Decoding "null padded string" leaves them there

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)
8.5.30.0120.00920.68
8.5.20.0100.00919.61
8.5.10.0110.00616.75
8.5.00.0110.00919.73
8.4.180.0110.01219.61
8.4.170.0110.00623.84
8.4.160.0110.01122.99
8.4.150.0080.00516.80
8.4.140.0130.00817.34
8.4.130.0050.00417.76
8.4.120.0120.00820.49
8.4.110.0110.01018.56
8.4.100.0060.00318.81
8.4.90.0100.01020.44
8.4.80.0080.00219.01
8.4.70.0130.00918.71
8.4.60.0100.01018.54
8.4.50.0130.00819.36
8.4.40.0030.00519.24
8.4.30.0100.00717.65
8.4.20.0100.01019.32
8.4.10.0090.00019.33
8.3.300.0090.01020.89
8.3.290.0120.00920.73
8.3.280.0130.00718.19
8.3.270.0140.00916.38
8.3.260.0080.01116.22
8.3.250.0080.01116.96
8.3.240.0070.00416.38
8.3.230.0160.00316.37
8.3.220.0090.00818.82
8.3.210.0120.00818.23
8.3.200.0060.00916.53
8.3.190.0120.00619.09
8.3.180.0090.00716.43
8.3.170.0140.00318.84
8.3.160.0030.00616.55
8.3.150.0160.00318.82
8.3.140.0090.00616.67
8.3.130.0120.00316.57
8.3.120.0080.00018.86
8.3.110.0060.00316.50
8.3.100.0100.00616.50
8.3.90.0060.00326.77
8.3.80.0040.00419.36
8.3.70.0140.00718.30
8.3.60.0060.00918.31
8.3.50.0100.00716.43
8.3.40.0040.01218.63
8.3.30.0080.00818.45
8.3.20.0000.00720.21
8.3.10.0080.00021.95
8.3.00.0080.00019.25
8.2.300.0130.00819.81
8.2.290.0090.00620.72
8.2.280.0110.01019.99
8.2.270.0030.00917.41
8.2.260.0040.00418.89
8.2.250.0060.01218.60
8.2.240.0060.00316.51
8.2.230.0050.00320.94
8.2.220.0030.00524.06
8.2.210.0050.00226.77
8.2.200.0070.00318.88
8.2.190.0070.00716.58
8.2.180.0090.00616.38
8.2.170.0030.01022.96
8.2.160.0070.00720.41
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0000.00822.12
8.2.120.0000.00826.35
8.2.110.0070.00322.11
8.2.100.0060.00617.90
8.2.90.0040.00417.75
8.2.80.0030.00519.11
8.2.70.0080.00017.93
8.2.60.0040.00417.93
8.2.50.0040.00418.10
8.2.40.0000.00720.48
8.2.30.0070.00019.36
8.2.20.0040.00417.96
8.2.10.0030.00619.72
8.2.00.0070.00018.20
8.1.340.0130.00719.25
8.1.330.0130.00421.66
8.1.320.0050.00516.27
8.1.310.0140.00316.66
8.1.300.0110.00718.22
8.1.290.0090.00330.84
8.1.280.0140.00325.92
8.1.270.0080.00023.90
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0060.00322.16
8.1.230.0000.01121.04
8.1.220.0080.00017.74
8.1.210.0000.00818.77
8.1.200.0050.00317.25
8.1.190.0040.00417.10
8.1.180.0030.00518.10
8.1.170.0040.00418.52
8.1.160.0050.00318.75
8.1.150.0000.00720.25
8.1.140.0000.00718.81
8.1.130.0000.00818.96
8.1.120.0000.00817.43
8.1.110.0000.00817.38
8.1.100.0070.00017.25
8.1.90.0060.00317.27
8.1.80.0080.00017.35
8.1.70.0040.00417.41
8.1.60.0000.00917.50
8.1.50.0070.00017.47
8.1.40.0050.00217.39
8.1.30.0040.00417.49
8.1.20.0050.00217.55
8.1.10.0040.00417.51
8.1.00.0040.00417.41
8.0.300.0070.00019.98
8.0.290.0030.00616.63
8.0.280.0000.00718.27
8.0.270.0000.00817.24
8.0.260.0080.00017.02
8.0.250.0000.00716.81
8.0.240.0000.00716.87
8.0.230.0040.00416.91
8.0.220.0000.00716.80
8.0.210.0030.00316.75
8.0.200.0060.00016.86
8.0.190.0040.00416.76
8.0.180.0030.00416.84
8.0.170.0000.00816.88
8.0.160.0070.00016.86
8.0.150.0070.00016.65
8.0.140.0070.00016.80
8.0.130.0030.00313.24
8.0.120.0060.00316.82
8.0.110.0030.00516.66
8.0.100.0030.00316.66
8.0.90.0070.00016.84
8.0.80.0060.01616.78
8.0.70.0070.00016.68
8.0.60.0070.00016.79
8.0.50.0060.00316.76
8.0.30.0110.00816.93
8.0.20.0120.00717.40
8.0.10.0030.00316.77
8.0.00.0070.01416.63
7.4.330.0020.00216.53
7.4.320.0000.00616.44
7.4.300.0030.00316.54
7.4.290.0030.00316.50
7.4.280.0000.00716.43
7.4.270.0030.00316.52
7.4.260.0040.00416.41
7.4.250.0030.00516.48
7.4.240.0000.00616.30
7.4.230.0030.00316.32
7.4.220.0000.00916.23
7.4.210.0080.00616.52
7.4.200.0040.00416.62
7.4.160.0110.01016.40
7.4.150.0090.00917.40
7.4.140.0120.00817.86
7.4.130.0070.01016.44
7.4.120.0180.00316.34
7.4.110.0030.01316.48
7.4.100.0140.00316.48
7.4.90.0180.00016.29
7.4.80.0170.00019.39
7.4.70.0100.01216.41
7.4.60.0100.00616.32
7.4.50.0060.00916.62
7.4.40.0120.00416.39
7.4.00.0090.00814.61
7.3.330.0000.00513.06
7.3.320.0050.00013.03
7.3.310.0030.00316.19
7.3.300.0000.00716.20
7.3.290.0030.00316.21
7.3.280.0100.00416.18
7.3.270.0030.01417.40
7.3.260.0090.01016.30
7.3.250.0130.00716.29
7.3.240.0110.00716.38
7.3.230.0090.01216.29
7.3.210.0100.00616.30
7.3.200.0130.00616.28
7.3.190.0150.00016.17
7.3.180.0100.01016.34
7.3.170.0060.01116.30
7.3.160.0100.00716.30
7.3.120.0070.01114.91
7.3.110.0140.00314.92
7.3.100.0040.01414.75
7.3.90.0030.01414.98
7.3.80.0030.01114.88
7.3.70.0090.00014.52
7.3.60.0100.00614.59
7.3.50.0030.00714.76
7.3.40.0070.01014.59
7.3.30.0000.00914.57
7.3.20.0060.00616.52
7.3.10.0040.00716.41
7.3.00.0040.01116.69
7.2.330.0110.00716.64
7.2.320.0140.00816.44
7.2.310.0060.01516.34
7.2.300.0100.01316.48
7.2.290.0060.01116.63
7.2.250.0100.00714.65
7.2.240.0030.01614.79
7.2.230.0080.00814.97
7.2.220.0030.01314.83
7.2.210.0070.01014.84
7.2.200.0100.00314.84
7.2.190.0030.00914.84
7.2.180.0070.00714.68
7.2.170.0070.01015.02
7.2.60.0030.00716.78
7.2.10.0170.01317.74
7.2.00.0230.00917.48
7.1.330.0100.00315.70
7.1.320.0000.01115.51
7.1.310.0030.00715.95
7.1.300.0030.01215.83
7.1.290.0000.01015.88
7.1.280.0060.00315.62
7.1.270.0100.00315.70
7.1.260.0030.01015.89
7.1.200.0040.00815.70
7.1.130.0160.00916.86
7.1.120.0120.01416.53
7.1.110.0160.01416.24
7.1.100.0180.00816.08
7.1.90.0170.00815.98
7.1.80.0220.00916.00
7.1.70.0220.01015.29
7.1.60.0360.01033.12
7.1.50.0310.01032.87
7.1.40.0290.00732.53
7.1.30.0280.00832.68
7.1.20.0260.01032.56
7.1.10.0370.01014.62
7.1.00.0150.00814.90

preferences:
105.53 ms | 1515 KiB | 5 Q