Pixi: Poor page experience (High TBT/FID)

[CraigBusfield]

URL

https://www.gaborshoes.co.uk/listings-ssr.html

Details

Metric	Field data	Lab data
LCP	n/a	4.6 s
FID	n/a	6346 ms
CLS	n/a	0.01
HTTPS	pass	---
Safe browsing	pass	---
Mobile-friendliness	pass	---
Intrusive Interstitials	<pass/fail>	---

Notes

Components in use: amp-access, amp-analytics, amp-animation, amp-bind, amp-consent, amp-form, amp-geo, amp-iframe, amp-install-serviceworker, amp-lightbox, amp-list, amp-mustache, amp-position-observer, amp-sidebar

This is a product listings page that has been generated via the PHP AMP Optimizer - it is the same site as the page discussed in #61. Therefore, we're aware of issues that have led to the slow LCP time and we are working on optimisations for those currently so that part can be ignored for now. However, we were looking for some advice on why the TBT/FID score is so high, and if there's anything we can do in terms of how we have implemented AMP to improve this.

/cc @ampproject/wg-performance