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https://issues.apache.org/jira/browse/COMPRESS-234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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BELUGA BEHR updated COMPRESS-234:
---------------------------------
Description:
I have looked over TarBuffer And TarArchiveInputStream and found some ways to
improve performance orders of magnitude.
I used a 1 GB TAR archive file (no compression).
Times for reading all entry file names:
Current - 630ms
Mine - 17ms
Times for extracting all entry files:
Current 2446ms
Mine - 2214ms
As you can see, I have enhanced the "skip" methods greatly. Actual extraction
was within a margin of error and the timings bounces around a lot.
was:
I have looked over TarBuffer And TarArchiveInputStream and found some ways to
improve performance orders of magnitude.
I used a 1 GB TAR archive file (no compression).
Times for reading all entry file names:
Current - 630ms
Mine - 17ms
Times for extracting all entry files:
Current 2446ms
Mine - 2214ms
As you can see, I have enhanced the "skip" methods greatly. Actual extraction
was within an margin of error as the times bounces around a lot.
> Patch: TAR InputStream Huge Speed Improvements
> ----------------------------------------------
>
> Key: COMPRESS-234
> URL: https://issues.apache.org/jira/browse/COMPRESS-234
> Project: Commons Compress
> Issue Type: Improvement
> Components: Archivers
> Reporter: BELUGA BEHR
> Attachments: TarArchiveInputStream.java.patch, TarBuffer.java.patch
>
>
> I have looked over TarBuffer And TarArchiveInputStream and found some ways to
> improve performance orders of magnitude.
> I used a 1 GB TAR archive file (no compression).
> Times for reading all entry file names:
> Current - 630ms
> Mine - 17ms
> Times for extracting all entry files:
> Current 2446ms
> Mine - 2214ms
> As you can see, I have enhanced the "skip" methods greatly. Actual
> extraction was within a margin of error and the timings bounces around a lot.
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