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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