Simon Willnauer created LUCENE-4857:
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Summary: StemmerOverrideFilter should not copy the stem override
dictionary in it's ctor.
Key: LUCENE-4857
URL: https://issues.apache.org/jira/browse/LUCENE-4857
Project: Lucene - Core
Issue Type: Bug
Components: modules/analysis
Affects Versions: 4.2, 4.1, 4.0
Reporter: Simon Willnauer
Priority: Minor
Fix For: 5.0, 4.2.1
Currently the dictionary is cloned each time the token filter is created which
is a serious bottleneck if you use this filter with large dictionaries and can
also lead to OOMs if lots of those filters sit in ThreadLocals and new threads
are added etc. I think cloning the map should be done in the analyzer (which
all of our analyzers do btw. but this is the only TF that does that) no need to
really copy that map.
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