I don't know if this is the reason, but I do know that Matthew made the jit able to see thru some structure operations. Perhaps that enables some other optimizations now that weren't in 5.3.1.
Robby On Sun, Nov 18, 2012 at 4:50 PM, Danny Yoo <d...@hashcollision.org> wrote: > I'm doing some micro-optimizations on my rb-tree implementation. One thing > I'm testing is inserting the entire contents of /usr/share/dict/words. It's > heavily dominated by structure-mutation code. > > Under 5.3.1, I see the following times: > > Timing construction of /usr/share/dict/words: > inserting 235886 words at the end... > cpu time: 446 real time: 446 gc time: 0 > dropping all those words... > cpu time: 355 real time: 374 gc time: 0 > inserting 235886 words at the front... > cpu time: 437 real time: 436 gc time: 0 > > > Out of curiosity, I wanted to see how fast this ran under Racket under git > (8d30f173). Under that version, I'm seeing: > > Timing construction of /usr/share/dict/words: > inserting 235886 words at the end... > cpu time: 195 real time: 195 gc time: 0 > dropping all those words... > cpu time: 203 real time: 217 gc time: 0 > inserting 235886 words at the front... > cpu time: 200 real time: 199 gc time: 0 > > > So I don't know what exactly happened between then and now, but whatever it > is, keep doing it! :) > > _________________________ > Racket Developers list: > http://lists.racket-lang.org/dev > _________________________ Racket Developers list: http://lists.racket-lang.org/dev
