Wouldn't it be better to namespace these bit-operators in a different module? Bit.clz() perhaps? The Math module is getting a bit crowded.
On Sat, 03 Mar 2012 23:21:11 -0800, Brendan Eich <bren...@mozilla.org> wrote: > I'm open to clz/clo. The names perhaps need to be less cryptic... or not. > > Allen should weigh in. > > /be > > Jussi Kalliokoski wrote: > > We're working on JS audio decoders, and one huge performance issue atm > > is clz() [count leading zeroes], which is a very commonly used > > algorithm in decoders. We've tried several different approaches and > > benchmarked them [1], however, different approaches work better on > > different engines, so optimizing the function is a bit of a no-go, > > especially if we want to have it fast in the future as well. > > > > So, I thought I'd propose something that would go well with the > > earlier proposals to extend Math [2]: > > > > Math.clz(number) > > > > This would allow for great speed boost in our decoders if it the JS > > engine had this built-in and optimized. > > > > While at it, it might be wise to add other related functions as well, > > such as clo (count leading ones), although not as useful. > > > > Cheers, > > Jussi > > > > [1]: http://jsperf.com/read-leading-zeros/8 > > [2]: http://wiki.ecmascript.org/doku.php?id=harmony:more_math_functions _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
