|Just another Perl shrine|
Efficient bit-twiddling in Perl.by BrowserUk (Pope)
|on Feb 28, 2013 at 14:47 UTC||Need Help??|
BrowserUk has asked for the
wisdom of the Perl Monks concerning the following question:
I need to break unsigned 32-bit values into 4 parts: (from the msb) 14-bits, 6-bits, 6-bits, 6-bits; (using perl rather than I::C or XS). That can be done as follows:
But I need to do this millions of times, so I'm looking to see if there is a more efficient way? (I don't care if I get 4 separate variables or an array with 4 values.)
Note: This is for me; no one else. Elegance, readability and maintainability are simply not considerations here. Just speed.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.