[
https://issues.apache.org/jira/browse/LUCENE-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12782065#action_12782065
]
Robert Muir commented on LUCENE-2090:
-------------------------------------
Mike, I implemented this common suffix, but only for dumb mode, it does not
help smart mode.
so i got rid of common prefix entirely, as its useless, and just replaced it.
I also take measures to ensure the suffix is well-formed UTF-8 :)
on my *N trunk tests its now 5700/5800ms on average versus 6000ms, just using
String.endsWith() before checking the DFA.
its a consistent gain, so I think for really crappy worst-case wildcards and
regular expressions,
we have a lot to gain by doing this with bytes, before converting to char[] and
running against the DFA.
I guess since TermRef exposes all the bytes, I could implement endsWith myself
in AutomatonTermsEnum in the future,
but it seems like it would be a nice complement to startsWith() ?
> convert automaton to char[] based processing and TermRef / TermsEnum api
> ------------------------------------------------------------------------
>
> Key: LUCENE-2090
> URL: https://issues.apache.org/jira/browse/LUCENE-2090
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Robert Muir
> Priority: Minor
> Fix For: 3.1
>
>
> The automaton processing is currently done with String, mostly because
> TermEnum is based on String.
> it is easy to change the processing to work with char[], since behind the
> scenes this is used anyway.
> in general I think we should make sure char[] based processing is exposed in
> the automaton pkg anyway, for things like pattern-based tokenizers and such.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-dev-h...@lucene.apache.org
