Do you cache fonts?
TPTQ Arabic font files remain in cache for one week, and CSS files are cached for 5 minutes. Practically speaking, this means that font data is loaded significantly faster, while changes in CSS can be still visible in 5 minutes. Returning visitors and visitors who visit multiple pages will experience faster loading times, as the fonts don’t need to be requested from the server, but are loaded from browser’s cache. This reduces webfont data transfer, so we don't count multiple page views, and page reloads, only count unique number of visitors.