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https://issues.apache.org/jira/browse/LUCENE-3233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13060686#comment-13060686
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Robert Muir commented on LUCENE-3233:
-------------------------------------
I ran some quick numbers, using the syn file example here, just best of 3 runs:
||Impl||Build time||RAM usage||
|SynonymFilterFactory|6619ms|207.92 mb|
|FSTSynonymFilterFactory|463 ms|3.51 mb|
I modified the builder slightly to build the FST more efficiently for this,
will upload the updated patch.
So i think the build-time and RAM consumption are really improved, the next
thing is to benchmark the runtime perf.
> HuperDuperSynonymsFilter™
> -------------------------
>
> Key: LUCENE-3233
> URL: https://issues.apache.org/jira/browse/LUCENE-3233
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Robert Muir
> Attachments: LUCENE-3223.patch, LUCENE-3233.patch, LUCENE-3233.patch,
> LUCENE-3233.patch, LUCENE-3233.patch, LUCENE-3233.patch, LUCENE-3233.patch,
> LUCENE-3233.patch, synonyms.zip
>
>
> The current synonymsfilter uses a lot of ram and cpu, especially at build
> time.
> I think yesterday I heard about "huge synonyms files" three times.
> So, I think we should use an FST-based structure, sharing the inputs and
> outputs.
> And we should be more efficient with the tokenStream api, e.g. using
> save/restoreState instead of cloneAttributes()
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