<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div id="yiv8102536196"><div><div style="background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;"><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span style="font-family: monospace; font-size: 11px;">Hi, I want improve the rendering of vector features in QGIS all possible. </span><span style="font-family: monospace; font-size: 11px;">This fantastic GIS desktop is very slow when it renders large datasets for far map scales.</span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica,
Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span style="font-family: monospace; font-size: 11px;"><br></span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span style="font-family: monospace; font-size: 11px;">I have opened a new branch of code in the repository of </span><span style="font-family: monospace; font-size: 11px;">QGIS </span><span style="font-family: monospace; font-size: 11px;">(</span><span style="font-family: monospace; font-size: 11px;"><a href="http://hub.qgis.org/issues/8725">http://hub.qgis.org/issues/8725</a>) to fix it and</span><span style="font-family: monospace; font-size: 11px;"> drawing tests give me ~3x faster that original code.</span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span style="font-family: monospace; font-size: 11px;"><br></span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span style="font-family: monospace; font-size: 11px;">But there is other important improvement related with data reading. I have experience with "FileMapping" capability which does the read of files very fast. </span><span style="font-family: monospace; font-size: 11px;">I don't see in OSGeo4W any library package that provide support for this capability. There any?</span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><span
style="font-family: monospace; font-size: 11px;"><br></span></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989"><span style="font-size: 11px;"><font face="monospace"><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989">If it does not exist and the community considers interesting to add this support, I propose "boost" <a href="http://www.boost.org/" style="background-color: rgb(255, 255, 255);">http://www.boost.org/</a> (or part thereof) that provides this functionality. It is cross-platform and open-source.</div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989"><br></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989">Could OSGeo4W add this package?</div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989">What think?</div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989"><br></div><div id="yiv8102536196yui_3_13_0_1_1383812794857_2989">Best regards</div></font></span></div><div
id="yiv8102536196yui_3_13_0_1_1383812794857_2989" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"><br></div></div></div></div></div></body></html>