On Sep 24, 2011 5:57 AM, "Christian Pühringer" <christian@puehringer.net> wrote:
> Hi Emanuel,
>
> Makes sense that images are not compressed in zim file again, thanks for the
> clarification.
> In particular for windows mobile this increases the probability that with
> reducing the cluster size
> a sufficient performance is achieved (i.p. if there was a better way to display
> images than in android, but I haven't looked into this).
> For android I still expect that it it will be better to use a native library.
>
> Christian
> Am 24.09.2011 14:30, schrieb Emmanuel Engelhart:
>> On 24/09/2011 14:24, Christian Pühringer wrote:
>>> The JAVA liblzma performance is pretty bad: To increase efficiency of
>>> compression in the zim-format articles (and also all
>>> other data like images) are stored in clusters. Cluster size is apparently about
>>> 1 MB. This implies that loading an article
>>> which is stored at the end of a cluster involves decompressing the complete
>>> cluster.
>> Images should not be compressed in ZIM files for the obvious reasons
>> they mainly are already compressed. This is the case for all ZIM files I
>> made. As far as I know this is also the case for Mediawiki:Collection
>> build ZIM files.
>>
>> Emmanuel
>>
>
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