Hello,
One of my customer created by mistake a file that is very slow to read with the library. It happens that this file has tons of styles declared in it (40.000) and that the library is not optimized for speed in that case.
An example file can be downloaded here : http://www.magmadev.com/temp/Slow-File.zip
==> It takes about 2 minutes to read that file on my laptop (which I could reduce to 1 second with a temporary patch on the library)
Thanks,
AG