| 1 |
On 2014.05.12 10:35, Tom Wijsman wrote: |
| 2 |
> On Sun, 11 May 2014 19:46:50 +0200 |
| 3 |
> Michał Górny <mgorny@g.o> wrote: |
| 4 |
> |
| 5 |
> > Rationale: xz-utils is quite widespread nowadays and it is a part |
| 6 |
> > of @system set. It can achieve better compression ratio than bzip2, |
| 7 |
> > and faster decompression at the same time. |
| 8 |
> |
| 9 |
> Some thoughts: |
| 10 |
> |
| 11 |
> What about putting multiple doc / man / info files in a single .xz |
| 12 |
> file |
| 13 |
> for each package? Would that further improve the situation? |
| 14 |
> |
| 15 |
> (As they can share dictionary, instead of having multiple |
| 16 |
> dictionaries) |
| 17 |
> |
| 18 |
> Some algorithms tend to work better for smaller files, whereas others |
| 19 |
> work better for larger files; might this be the case for bzip2 vs. |
| 20 |
> xz? |
| 21 |
> |
| 22 |
> -- |
| 23 |
> With kind regards, |
| 24 |
> |
| 25 |
> Tom Wijsman (TomWij) |
| 26 |
> Gentoo Developer |
| 27 |
> |
| 28 |
> E-mail address : TomWij@g.o |
| 29 |
> GPG Public Key : 6D34E57D |
| 30 |
> GPG Fingerprint : C165 AF18 AB4C 400B C3D2 ABF0 95B2 1FCD 6D34 E57D |
| 31 |
> |
| 32 |
|
| 33 |
Some more thoughts ... |
| 34 |
|
| 35 |
What about not compressing files smaller than the filesysem block size |
| 36 |
at all. In my case its 4k. Any file gets allocated 4k on disc anyway, |
| 37 |
so compression/decompression is just a waste of resource for files |
| 38 |
<=4k. |
| 39 |
|
| 40 |
I'm not suggesting dynamically determining the output filesystem block |
| 41 |
size (unless you really want to), choose a static limit below which |
| 42 |
compression will not be applied. |
| 43 |
|
| 44 |
That eliminates the discussion about small files. |
| 45 |
-- |
| 46 |
Regards, |
| 47 |
|
| 48 |
Roy Bamford |
| 49 |
(Neddyseagoon) a member of |
| 50 |
elections |
| 51 |
gentoo-ops |
| 52 |
forum-mods |
| 53 |
trustees |
Archives