You can find seven grounds as a whole: however when that is always a lot to browse, just view that the explainer video clip:
Even though customized JS is actually permitted as part of amp-script, as well as third-party JS was granted as part of iframes, this can not block making. For instance, if third-party JS makes use of that the super-bad-for-performance document. Write API, it generally does not block making that the page that is main.
Measured each means statically
Outside resources such as for example photos, advertisements otherwise iframes need state his or her shape inside HTML in order that AMP might find out every element’s measured as well as position prior to means is installed. AMP plenty each design of web web page minus looking forward to a resources in order to down load.
AMP uncouples document design at site design. Just one HTTP demand is necessary to design your doc that is entire+fonts). As AMP was fine tuned to avoid high priced design recalculations as well as designs within the internet browser, here won’t get all re-layout after means load.
Do not let expansion mechanisms block making
AMP does not enable expansion mechanisms block web web page making. AMP aids extensions concerning such things as lightboxes, instagram embeds, twitter posts, and so forth. Those requests do not block page layout and rendering while these require additional HTTP requests.