What is the name of the domain?
What is the issue you’re encountering
Increase in TTFB
What steps have you taken to resolve the issue?
I have identified that it is when the user is logged into the website that the TTFB increases from 0.1 s to 1.3 seconds (approx).
I cannot do too much right now to ‘debug’ the issue using CF because we don’t have a dev environment where I can test potential solutions.
However, on our dev site we DO NOT have Cloudflare and this issue does not happen. So this would suggest that it is something to do with the config of Cloudflare.
It seems that Cloudflare APO is good for normal WooCOmmerce stores however, we have a cookie stored on the site when the user logs in to allow them to also log into the web app which they will be directed to automatically after login. So it could be this cookie which Cloudflare is not expecting and causing the issue.
What are the steps to reproduce the issue?
Just measure the TTFB when you are logged into the site and not logged into the site.
This seems to be common with WooCommerce stores
