Regarding LCP

Skip to first unread message

Nikhil Sharma

Oct 22, 2021, 3:16:46 AM10/22/21
to Chrome UX Report (Discussions), Rick Viscomi
Hi Rick,

Hope you doing well mate! 

My question is that what negative impact has in LCP high server response, unused javascript and avoiding critical chain! 

 Can you please little on these aspects! 


Gilberto Cocchi

Oct 25, 2021, 4:19:20 AM10/25/21
to Nikhil Sharma, Chrome UX Report (Discussions), Rick Viscomi
Hi Nikhil, nice to e-meet you.

Let me share with you this image that hopefully will explain the correlation within LCP by Image (similar on LCP by Text) and with TTFB and render blocking JS/CSS.

Schermata 2021-10-25 alle 10.15.39.png

As you can see from the image a high TTFB can decrease the time to be able to deliver a good LCP to the user, the later the page is returned the higher TTFB would be but respectively this delay propagates to FCP and LCP.

The same is valid for Render Blocking JS and CSS, if there is a lot of Render blocking CSS and JS code on a page and the LCP time is determined by an Image, this time is critical to allow the browser to discover the image as soon as possible and start downloading it (the blu bar) in order to increase the chance to improve the resulting LCP time.

Hope this helps.

You received this message because you are subscribed to the Google Groups "Chrome UX Report (Discussions)" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
To view this discussion on the web visit


gTech Up

Gilberto Cocchi
Web Ecosystem Consultant
+39 02 3661 8337

Google Italy | Via Federico Confalonieri 4 | Porta Nuova Isola | Building C | Milan 20124

Registered in Milan, Italy

This email may be confidential and privileged. If you received this communication by mistake, please don't forward it to anyone else, please erase all copies and attachments, and please let me know that it has gone to the wrong person.

The above terms reflect a potential business arrangement, are provided solely as a basis for further discussion, and are not intended to be and do not constitute a legally binding obligation. No legally binding obligations will be created, implied, or inferred until an agreement in final form is executed in writing by all parties involved.

Reply all
Reply to author
0 new messages