For a complex font, like Amiri, it will render faster than the other route, because it has now fewer ligatures (zero ligatures in case of Amiri), here are the results of rendering a simple page of text 1000 times:
DeJaVu Sans 0m39.488s
Times New Roman 0m28.670s
Traditional Arabic 0m37.476s
Arabic Typesetting 2m5.316s
Amiri 1m3.827s
All are simple fonts, only Arabic Typesetting has the degree of sophistication Amiri has and it takes double the time Amiri takes.
For a complex font, like
كتبه خالد يوم 20 سبتمبر 2010 حوالي الساعة 15:37For a complex font, like Amiri, it will render faster than the other route, because it has now fewer ligatures (zero ligatures in case of Amiri), here are the results of rendering a simple page of text 1000 times:
All are simple fonts, only Arabic Typesetting has the degree of sophistication Amiri has and it takes double the time Amiri takes.