4 ms·Someone might mention that the ebook (PDF, ePub and mobi) is provided free in the link.by nutmeg 13y agoSomeone might mention that the ebook (PDF, ePub and mobi) is provided free in the link.webmaven 13y agoMy original title was something like "Facebook engineer releases software optimization ebook", which at least implied that it was available for download.dasil003 13y agoThat someone is you. I missed the link until I read your comment, thanks.