https://bugs.freedesktop.org/show_bug.cgi?id=82055
--- Comment #13 from Kai kai@dev.carbon-project.org --- Created attachment 104001 --> https://bugs.freedesktop.org/attachment.cgi?id=104001&action=edit sysporf points to libpixman
According to the sysprof output, libpixman is the place where moste CPU time goes. If you want the sysprof output, let me know and I e-mail it to you. Not sure I want to put it on the internet, as didn't have time to check what data might be disclosed.