Yes, images are not compressed in ZIM files, as Emmanuel pointed out.<br><br>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. <br>
<br>LZMA-Java is under frequent development by Lasse Collin, so we should make sure that the latest code is used.<br><br><div class="gmail_quote">On Sat, Sep 24, 2011 at 6:00 PM, Emmanuel Engelhart <span dir="ltr">&lt;<a href="mailto:emmanuel@engelhart.org">emmanuel@engelhart.org</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">On 24/09/2011 14:24, Christian Pühringer wrote:<br>
&gt; The JAVA liblzma performance is pretty bad: To increase efficiency of<br>
&gt; compression in the zim-format articles (and also all<br>
&gt; other data like images) are stored in clusters. Cluster size is apparently about<br>
&gt; 1 MB. This implies that loading an article<br>
&gt; which is stored at the end of a cluster involves decompressing the complete<br>
&gt; cluster.<br>
<br>
Images should not be compressed in ZIM files for the obvious reasons<br>
they mainly are already compressed. This is the case for all ZIM files I<br>
made. As far as I know this is also the case for Mediawiki:Collection<br>
build ZIM files.<br>
<font color="#888888"><br>
Emmanuel<br>
<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Best,<br><br>Arunesh Mathur<br>IV year, Undergraduate,<br>Department of Computer Science and Engineering,<br>National Institute of Technology Karnataka Surathkal,<br>
India.<br><br>