Wow! A much larger gain than I expected! Thanks for the profile Paul! -Yonik Now hiring -- http://forms.cnet.com/slink?231706
On 11/16/05, Paul Smith <[EMAIL PROTECTED]> wrote: > I can confirm this takes ~ 20% of an overall Indexing operation (see > attached link from YourKit). > > http://people.apache.org/~psmith/luceneYourkit.jpg > > Mind you, the whole "signalling via IOException" in the > FastCharStream is a way bigger overhead, although I agree much harder > to fix. > > Paul Smith > > On 17/11/2005, at 7:21 AM, Yonik Seeley wrote: > > > Float.floatToRawIntBits (in Java1.4) gives the raw float bits without > > normalization (like *(int*)&floatvar would in C). Since it doesn't do > > normalization of NaN values, it's faster (and hopefully optimized to a > > simple inline machine instruction by the JVM). > > > > On my Pentium4, using floatToRawIntBits is over 5 times as fast as > > floatToIntBits. > > That can really add up in something like Similarity.floatToByte() for > > encoding norms, especially if used as a way to compress an array of > > float during query time as suggested by Doug. > > > > -Yonik > > Now hiring -- http://forms.cnet.com/slink?231706 > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
