Dawid Weiss created SOLR-4871:
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Summary: Another (fast) language identifier (port of langid.py)
Key: SOLR-4871
URL: https://issues.apache.org/jira/browse/SOLR-4871
Project: Solr
Issue Type: New Feature
Components: contrib - LangId
Reporter: Dawid Weiss
Priority: Trivial
I've ported langid.py -- a Python language identifier with some very nice
properties (see the research paper by Marco Lui) and pretty good language
identification quality.
The major benefit though is speed. Without subsampling (which google code's
languagedetection does) the benchmark on europarl clocks at:
{code}
--> langid-v3
20826/ 21000 (99.1714%) in 0.75 sec. (28075 docs/sec.)
--> languagedetect
20846/ 21000 (99.2667%) in 4.24 sec. (4948 docs/sec.)
{code}
So nearly the same language detection quality and five times faster. If you
limit the number of languages to detect it'll be faster still -- see the
benchmarking snippets.
Yet another nice (?) property is that it runs on UTF8 sequences natively. I've
built-in a loop with the default Java's charset decoder but if you already have
BytesRef you don't need to create strings at all.
https://oss.sonatype.org/content/repositories/releases/com/carrotsearch/langid-java/
The source code is at github:
https://github.com/carrotsearch/langid-java
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