perf: Avoid re-fetching file status from FS for HFile readers #17709
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the-other-tim-brown
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yihua
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Dec 24, 2025
| byte[] buffer; | ||
| try (SeekableDataInputStream stream = storage.openSeekable(path, false)) { | ||
| buffer = new byte[(int) storage.getPathInfo(path).getLength()]; | ||
| buffer = new byte[(int) fileSize]; |
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For an inline path (inlinefs:), this represents the log block size instead of the full log file size. Will that be a problem?
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Is there a path that executes this that I can run locally?
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Describe the issue this Pull Request addresses
The HFile readers are looking up the file length when the code supplies a path to read. We often know the length for the reader upfront so we should avoid looking this up again.
Summary and Changelog
Impact
Improves performance when dealing with remote filesystems like S3/GCS
Risk Level
Low, functionality is covered by existing tests
Documentation Update
Contributor's checklist