Hi, It confused me very often when I was using Chrome that libfontconfig.so occupied too much CPU resources only when Chrome was loading a page with Chinese fonts such as SimSun and Microsoft YaHei. It haven't happened with English fonts. Actually, the .so was always the top or second in `perf top`. I have read some source codes and downloaded the debug pkg. In .so's DSO, a function not in symbol table usually took 90+% resources. The address was located between 0x1e190-0x1e360. According to debug pkg's symbol table and disassembled codes with objdump, all of these are a series of FcStrCaseWalker* functions and Ucs-Utf transcoding functions. And the function FcStrCaseWalkerNext's address(0x1e190) would appear usually. I read some source codes about FcStrCaseWalkerNext and its caller, but they seem harmless. And I tried some sample programs and a program I wrote, all worked very well. I guess, perhaps the function was called very often when using FcConfig*, FcPattern*, FcFontSet* to GetObject or GetString. On my computer(Thinkpad X240s i7-4500u), the problem could make devices' temperatures rise rapidly from 113 ℉ to 149 ℉ and cool down slowly for the .so would occupy much CPU resources always. Maybe someone could tell me how to deal with it? Thanks in advance. _______________________________________________ Fontconfig mailing list Fontconfig@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/fontconfig
