Optimize TermInfosWriter.add
----------------------------
Key: LUCENE-1119
URL: https://issues.apache.org/jira/browse/LUCENE-1119
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Reporter: Michael McCandless
Assignee: Michael McCandless
Priority: Minor
Fix For: 2.3
Attachments: LUCENE-1119.patch
I found one more optimization, in how terms are written in
TermInfosWriter. Previously, each term required a new Term() and a
new String(). Looking at the cpu time (using YourKit), I could see
this was adding a non-trivial cost to flush() when indexing Wikipedia.
I changed TermInfosWriter.add to accept char[] directly, instead.
I ran a quick test building first 200K docs of Wikipedia. With this
fix it took 231.31 sec (best of 3) and without the fix it took 236.05
sec (best of 3) = ~2% speedup.
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