On Feb 29, 2008, at 11:22 AM, Petite Abeille wrote:
Lulu is a meant to be a pure Lua implementation of Lucene.
How fast is Lua's method dispatch, compared to Java's? That has a huge impact on performance, since *everything* is a method in Lucene -- down to writeByte().
There have been several attempts at pure dynamic language ports of Lucene, including Plucene (Perl), Lupy (Python), and the original pure- Ruby implementation of Ferret. All of those have proven unacceptably slow. The ports which have achieved good performance, including CLucene (C++), Lucene.NET, the latter-day Ferret (C/Ruby), and KinoSearch (C/Perl) (and possibly others, I haven't reviewed them all) all get close to the metal. None rely on hash-based method dispatch for inner-loop code, and all manipulate primitive types directly.
Marvin Humphrey Rectangular Research http://www.rectangular.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
