Yes, images are not compressed in ZIM files, as Emmanuel pointed out. Also, I have tried decompressing a LZMA compressed file on an Android phone (HTC Wildfire to be precise), and the decompression speed is not a problem.
LZMA-Java is under frequent development by Lasse Collin, so we should make sure that the latest code is used. On Sat, Sep 24, 2011 at 6:00 PM, Emmanuel Engelhart <[email protected]>wrote: > 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 > > > _______________________________________________ > dev-l mailing list > [email protected] > https://intern.openzim.org/mailman/listinfo/dev-l > > -- Best, Arunesh Mathur IV year, Undergraduate, Department of Computer Science and Engineering, National Institute of Technology Karnataka Surathkal, India.
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