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