only cart and checkout are slow – litespeed

If your page only loads slower in the cart and in the checkout, then the reason for this is not that these pages are not optimized enough. These pages are not and must not be cached, and since the improvement in loading time is not the result of page optimization, but rather the cache function, it is normal for the uncached pages to load much more slowly. That’s why there’s nothing that can be fixed, at least not with the plugin. The only way out of this dilemma is to upgrade to a more powerful server. It might be better if you disable ESI if you don’t absolutely need ESI.

we already have a dedicated server

we removed some scripts from those pages, but the ttfb remains the hurdle because its on 4seconds

any other trick you can recommend about?

a piece of advice on my own experience

dedicated server does not always means good performance , you should try some of these high-frequency CPU , don’t take the ones with a lot of cores but low frequency

like I would rather take a 8 core @ 3.5 GHz , instead of 32 cores @ 2.3 GHz

Thank you, will update next week if higher cpu solved the issue

well , it won’t solve it , but at least should give some improvement

I once had a page that is very heavy on mysql query , on a VPS (10 dedicated cores @ 2.0 – 3.35 GHz , ?EPYC? 7702) it took like 120 seconds to finish

on a dedicated server with Ryzen 7 5800X (3.8 – 4.7 GHz ) , it then only took like 20 seconds to finish

so how do large companies resolve slow cart and slow checkout?

I do not know , that’s very much depend on your site

if you haven’t noticed , the default clean WooCommerce site , the checkout/cart page loads like in 0.2 second or so

so why your site takes so long ?

usually because you have installed a lot of plugins , these plugin will slow thing down , the more plugins you installed , the slower you will be , specially when a plugin is bad-written

for big companies , I think they could have custom plugin/system that with performance in mind when design/build the page , also proper hardware and software management

@saveatrain

Even if @qtwrk talks about a practical case in which a server with multiple cores would have brought a significant performance advantage, one should not generalize. Every WP and WooCommerce installation is different. From my point of view, the additional expenses for a more powerful hosting are out of proportion to the hoped-for advantages. You mustn’t forget one thing. WooCommerce is not an independent shop solution. It is a plugin solution on top of software that was never intended to turn blog software into a fully-fledged shop solution. WooCommerce doesn’t slow down with the increase in items. Compared to WP without WooCommerce, WooCommerce is already 4 times slower when installed. Before you attempt a server upgrade, tidy up your plugins and reduce them to what is absolutely necessary. In any case, you will achieve more with it than with a server, no matter how powerful it is.

Also, the comparison given by @qtwrk is lagging. The specifications of a VPS in terms of CPU equipment are not comparable to those of a dedicated server, because the VPS specifications are often virtual hardware specifications.

the homepage loads at ttfb of 200-300ms

its just cart and checkout that are slow, any settings we can do on litespeed side to increase that, because even if you go to gtmetrix

https://gtmetrix.com/reports/www.kideno.com/WDBp0XC8/

it says if you use wp-rocket it will lower the ttfb