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Bug 199739 - BinaryFS call to intern is slow.
Summary: BinaryFS call to intern is slow.
Alias: None
Product: platform
Classification: Unclassified
Component: Filesystems (show other bugs)
Version: 7.1
Hardware: PC Linux
: P2 normal (vote)
Assignee: Jaroslav Tulach
Depends on:
Reported: 2011-06-27 15:30 UTC by Petr Hrebejk
Modified: 2011-08-27 08:06 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter:

Eliminating calls to intern. (7.68 KB, patch)
2011-07-21 14:23 UTC, Jaroslav Tulach
Details | Diff
Trying to do "intern()" when the file is being written, so it is ready when reading it (16.46 KB, patch)
2011-08-11 15:00 UTC, Jaroslav Tulach
Details | Diff

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Description Petr Hrebejk 2011-06-27 15:30:34 UTC
Reading all files (~38K) and attributes (~150K) from BinaryFS is slow because of calls into String.intern() in initialize:437 method. (two calls).
Comment 1 Jaroslav Tulach 2011-07-21 14:23:07 UTC
Created attachment 109556 [details]
Eliminating calls to intern. 

Hřebejku can you find out if this is faster?
Comment 2 Jaroslav Tulach 2011-08-11 15:00:08 UTC
Created attachment 109932 [details]
Trying to do "intern()" when the file is being written, so it is ready when reading it

Hřebejku, please measure and if it is not faster, give me a profiler snapshot.
Comment 3 Petr Hrebejk 2011-08-24 16:32:14 UTC
Looks OK. The measurements show about 10% performance improvement when reading the filesystem.
Comment 4 Jaroslav Tulach 2011-08-25 08:32:44 UTC
OK, let's integrate.
Comment 5 Jaroslav Tulach 2011-08-25 08:57:21 UTC
Comment 6 Quality Engineering 2011-08-26 14:39:34 UTC
Integrated into 'main-golden'
User: Jaroslav Tulach <>
Log: #199739: Precompute 'intern' on save, so we don't need to call it on load