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Hello, all When I used Adobe ArnoPro font in Mkvi with default font features, I found the memory useage of LuaTeX was very big. These are some tests: \starttypescript [serif] [arno] \definefontsynonym [SerifBold] [ArnoPro-Bold.otf] [features=default] \definefontsynonym [SerifBoldItalic] [ArnoPro-BoldItalic.otf] [features=default] \definefontsynonym [SerifItalic] [ArnoPro-Italic.otf][features=default] \definefontsynonym [Serif] [ArnoPro-Regular.otf] [features=default] \stoptypescript \starttypescript [arno] \definetypeface [arno] [rm] [serif] [arno] [default] \stoptypescript \usetypescript[arno] \setupbodyfont[arno, 11pt] \starttext \rm test\par \it test\par \bf test\par \bi test\par \stoptext and this is the information in log: mkiv lua stats : fonts load time - 25.328 seconds mkiv lua stats : result saved in file - cont-en.pdf mkiv lua stats : luatex banner - this is luatex, version beta-0.50.0-2009122521 mkiv lua stats : control sequences - 29946 of 165536 mkiv lua stats : current memory usage - 479 MB (ctx: 491 MB) mkiv lua stats : runtime - 27.828 seconds, 0 processed pages, 1 shipped pages, 0.036 pages/second SyncTeX written on lua.synctex.gzMTXrun | total runtime: 28.063 When I used these fonts without font feature, I got these: mkiv lua stats : fonts load time - 3.016 seconds mkiv lua stats : result saved in file - cont-en.pdf mkiv lua stats : luatex banner - this is luatex, version beta-0.50.0-2009122521 mkiv lua stats : control sequences - 29946 of 165536 mkiv lua stats : current memory usage - 84 MB (ctx: 86 MB) mkiv lua stats : runtime - 5.344 seconds, 0 processed pages, 1 shipped pages, 0.187 pages/second SyncTeX written on lua.synctex.gzMTXrun | total runtime: 5.484 How can I reduce the memory useage in such situation?