Recent development builds now use an updated version of our libcss library. It makes a significant optimisation to the amount of time NetSurf spends applying CSS rules to document elements to discover their style.
The improvement is in NetSurf CI builds from #1508 onward. For more details about the change to libcss and profiling results, see this posting: http://vlists.pepperfish.net/pipermail/netsurf-dev-netsurf-browser.org/2013-December/003230.html -- Michael Drake (tlsa) http://www.netsurf-browser.org/
