low compression ratio

[jpillora]

low compression ratio

[kofalt]

Would it be possible to provide the file in question?

[jpillora]

Yep, will post once I get home
On Sun, 31 Jan 2016 at 6:19 AM Nathaniel Kofalt [email protected]
wrote:

Would it be possible to provide the file in question?

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#5 (comment).

[jpillora]

redacted copy with similar results: https://gist.github.com/jpillora/f8e0d0b3eb6a066ae5b0/raw/84847dae70ba396d7a2d19ba888e756a7b37362f/a.log

[ulikunitz]

Hi, many thanks for reporting the issue.

I have stated in the README.md that the compression ratio is not as good as with xz, so this is not a surprise. The way of selecting matches has been poor leading to a bad compression ratio. I have worked on it over the last few days. Now the dev branch is compressing your file to 6.8 KiB, which is still not as good than the xz tool but better than gzip. Since compression is now much faster than the xz tool I'm optimistic that I can trade compression speed to improve the compression ratio. But this requires still some work and tooling.

I have marked the issue for closure by the v0.5 milestone.

[jpillora]

Oh nice work. I'll give it a try tonight
On Mon, 1 Feb 2016 at 7:16 AM Ulrich Kunitz [email protected]
wrote:

Hi, many thanks for reporting the issue.

I have stated in the README.md that the compression ratio is not as good
as with xz, so this is not a surprise. The way of selecting matches has
been poor leading to a bad compression ratio. I have worked on it over the
last few days. Now the dev branch is compressing your file to 6.8 KiB,
which is still not as good than the xz tool but better than gzip. Since
compression is now much faster than the xz tool I'm optimistic that I can
trade compression speed to improve the compression ratio. But this requires
still some work and tooling.

I have marked the issue for closure by the v0.5 milestone.

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#5 (comment).

[jpillora]

$ gxz a.log
$ ll
total 16
-rw-r--r--  1 jpillora  wheel   6.8K  1 Feb 12:30 a.log.xz

Great work :)