A few months ago I suggested adding a utility that converts a Directory to a RAMDirectory - useful if the index fits into RAM & are you're performing a series of expensive searches on the index. It seems to have no additional startup cost (surprising) and reduces execution time approx 20% (seems to be reasonable). I may have missed this or an equivalent utility being in the source base but looked at rc5 and didn't see it.
So I'm "reposting" this info & putting up a web page so this can
be reused & found by, um, searchers.
The utility drops in easy to existing code.
You replace a line like this:
searcher = new IndexSearcher( indexName);
with
searcher = new IndexSearcher( Rammer.convert( indexName));
And that's it - approx reduction of 20% of runtime in some tests.
For 2 experimental apps that do extensive term analysis (freq of pairs
of terms)
the time reductions are:
app 1: 45sec to 35sec
app 2: 22sec to 18sec
This is just by making a 1 line change.
I've attached the file here and written it up a bit
on the web:
http://www.tropo.com/techno/java/lucene/rammer.html
I'm not an approved code contributor and ask that those who are consider
adding this to the base - could be a ctr to RAMDirectory or a method in
Directory of FSDirectory or a separate utility.
Rammer.java
Description: Rammer.java
-- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
