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Subject [jira] [Commented] (COMPRESS-234) Patch: TAR InputStream Huge Speed Improvements
Date Wed, 24 Jul 2013 00:52:49 GMT


BELUGA BEHR commented on COMPRESS-234:


No problem on how things have been going.  I'm not sure if you're paid staff, but regardless,
I know you have a lot on your plate.

Please let me know if you need any additional input on this ticket.  Now here comes the act
of stating the obvious: I would love to see this in and released ASAP.  Sadly, I had to abandoned
both Commons VFS and Commons Compress at work today.  I came across too many show stopping
bugs with VFS and I was getting a NULL pointer exception with TarArchiveInputStream in COMPRESS-1.5.
 I had to back-fill with Java's GZIP, ZIP, and different 3rd-party TAR library.

> Patch: TAR InputStream Huge Speed Improvements
> ----------------------------------------------
>                 Key: COMPRESS-234
>                 URL:
>             Project: Commons Compress
>          Issue Type: Improvement
>          Components: Archivers
>            Reporter: BELUGA BEHR
>         Attachments: Archiver_Tar.2.patch, Archiver_Tar.3.patch, Archiver_Tar.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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