3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gray_code($bits) { if ($bits == 1) { return array('0', '1'); } else { $codes = gray_code($bits - 1); return array_merge(array_map(function ($v) { return '0' . $v; }, $codes), array_map(function ($v) { return '1' . $v; }, array_reverse($codes)) ); } } $value = 115; $bin = decbin($value); // get sufficient gray codes to cover the input $gray_codes = gray_code(strlen($bin)); $codes = array_flip($gray_codes); echo "$bin takes {$codes[$bin]} steps to reduce to 0\n"; // echo the steps for ($i = $codes[$bin]; $i >= 0; $i--) { echo $gray_codes[$i] . PHP_EOL; }

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)
8.3.110.0040.00416.50
8.3.100.0080.00024.06
8.3.90.0080.00026.77
8.3.80.0090.00316.38
8.3.70.0110.00316.58
8.3.60.0090.00918.08
8.3.50.0130.00724.51
8.3.40.0150.00618.84
8.3.30.0110.00918.64
8.3.20.0080.00021.79
8.3.10.0080.00021.92
8.3.00.0080.00023.70
8.2.230.0070.00720.94
8.2.220.0060.00637.54
8.2.210.0040.00426.77
8.2.200.0090.00016.50
8.2.190.0130.00616.63
8.2.180.0030.01725.92
8.2.170.0080.00818.82
8.2.160.0140.00422.26
8.2.150.0110.00724.18
8.2.140.0000.00824.66
8.2.130.0080.00026.16
8.2.120.0070.00020.80
8.2.110.0040.00420.61
8.2.100.0110.00417.91
8.2.90.0000.00819.21
8.2.80.0000.00817.97
8.2.70.0000.00817.75
8.2.60.0040.00417.93
8.2.50.0030.00618.07
8.2.40.0030.00518.28
8.2.30.0050.00319.34
8.2.20.0000.00718.02
8.2.10.0030.00519.20
8.2.00.0000.00719.29
8.1.290.0030.00618.88
8.1.280.0120.00425.92
8.1.270.0060.00923.85
8.1.260.0080.00026.35
8.1.250.0030.00528.09
8.1.240.0040.00422.08
8.1.230.0090.00320.87
8.1.220.0040.00417.80
8.1.210.0040.00418.77
8.1.200.0030.00917.36
8.1.190.0040.00417.36
8.1.180.0030.00618.10
8.1.170.0030.00618.64
8.1.160.0060.00318.97
8.1.150.0040.00418.94
8.1.140.0040.00418.92
8.1.130.0040.00417.39
8.1.120.0040.00417.39
8.1.110.0040.00417.52
8.1.100.0030.00617.48
8.1.90.0080.00017.43
8.1.80.0040.00417.46
8.1.70.0030.00317.48
8.1.60.0000.00817.57
8.1.50.0040.00417.45
8.1.40.0030.00717.55
8.1.30.0000.00917.58
8.1.20.0030.00517.55
8.1.10.0030.00517.64
8.1.00.0000.01017.45
8.0.300.0040.00418.77
8.0.290.0080.00016.75
8.0.280.0000.00718.30
8.0.270.0050.00218.09
8.0.260.0000.00716.88
8.0.250.0030.00316.99
8.0.240.0050.00217.00
8.0.230.0050.00316.87
8.0.220.0070.00016.97
8.0.210.0040.00416.92
8.0.200.0000.00717.01
8.0.190.0070.00016.93
8.0.180.0040.00416.97
8.0.170.0070.00316.95
8.0.160.0000.00716.87
8.0.150.0040.00416.95
8.0.140.0040.00416.93
8.0.130.0030.00313.31
8.0.120.0040.00415.12
8.0.110.0010.00515.14
8.0.100.0020.00515.03
8.0.90.0030.00415.14
8.0.80.0030.01015.70
8.0.70.0050.00115.10
8.0.60.0050.00215.09
8.0.50.0000.00715.04
8.0.30.0050.00915.17
8.0.20.0070.00915.25
8.0.10.0060.00415.19
8.0.00.0080.00515.07
7.4.330.0000.00415.55
7.4.320.0070.00016.45
7.4.300.0060.00317.28
7.4.290.0000.00716.67
7.4.280.0000.00816.61
7.4.270.0030.00316.60
7.4.260.0000.00613.31
7.4.250.0060.00414.93
7.4.240.0090.00114.94
7.4.230.0030.00514.96
7.4.220.0000.00815.46
7.4.210.0070.00815.77
7.4.200.0030.00514.89
7.4.190.0080.00413.35
7.4.180.0120.00013.33
7.4.160.0050.00513.29
7.4.150.0060.00313.34
7.4.140.0080.00413.22
7.4.130.0110.01015.49
7.4.120.0110.00714.86
7.4.110.0110.00514.94
7.4.100.0110.00714.85
7.4.90.0070.00814.85
7.4.80.0040.01116.28
7.4.70.0110.00414.87
7.4.60.0070.00814.87
7.4.50.0090.00615.38
7.4.40.0090.00614.69
7.4.30.0090.00614.77
7.4.20.0120.00114.91
7.4.10.0090.00614.94
7.4.00.0080.00714.83
7.3.330.0030.00316.33
7.3.320.0070.00413.33
7.3.310.0070.00314.90
7.3.300.0080.00314.76
7.3.290.0080.00915.57
7.3.280.0120.00413.29
7.3.270.0090.00713.17
7.3.260.0120.00714.84
7.3.250.0100.00513.41
7.3.240.0110.00815.85
7.3.230.0130.00814.85
7.3.220.0070.00713.27
7.3.210.0150.00214.76
7.3.200.0070.00914.85
7.3.190.0080.00814.90
7.3.180.0050.00814.83
7.3.170.0110.00314.71
7.3.160.0080.00714.92
7.3.150.0090.00514.85
7.3.140.0050.00814.76
7.3.130.0090.00514.89
7.3.120.0080.00514.85
7.3.110.0060.00814.81
7.3.100.0070.00614.75
7.3.90.0090.00414.92
7.3.80.0110.00514.82
7.3.70.0080.00714.71
7.3.60.0090.00614.74
7.3.50.0070.00614.76
7.3.40.0090.00614.84
7.3.30.0120.00314.68
7.3.20.0110.00415.66
7.3.10.0140.00215.70
7.3.00.0130.00215.63
7.2.340.0080.00513.41
7.2.330.0120.00515.10
7.2.320.0110.00414.88
7.2.310.0070.00915.07
7.2.300.0070.01015.04
7.2.290.0110.00615.03
7.2.280.0110.00515.02
7.2.270.0090.00615.09
7.2.260.0060.00914.97
7.2.250.0070.00814.96
7.2.240.0080.00914.98
7.2.230.0110.00415.07
7.2.220.0090.00614.85
7.2.210.0080.00715.01
7.2.200.0150.00315.14
7.2.190.0100.00515.09
7.2.180.0090.00614.94
7.2.170.0070.00815.06
7.2.160.0070.00815.08
7.2.150.0080.00715.87
7.2.140.0080.00816.11
7.2.130.0070.00915.95
7.2.120.0120.00315.98
7.2.110.0110.00416.08
7.2.100.0110.00415.94
7.2.90.0120.00416.07
7.2.80.0080.00715.93
7.2.70.0110.00516.01
7.2.60.0060.00916.08
7.2.50.0090.00516.04
7.2.40.0060.00916.04
7.2.30.0110.00815.97
7.2.20.0080.00816.02
7.2.10.0120.00316.01
7.2.00.0100.00615.97

preferences:
38.98 ms | 403 KiB | 5 Q