TTFB 9 SEC+ for Logged in Users

please try and check:

what is the TTFB on login users, if LSCWP is disabled ?

what is the TTFB on login users, if cache is miss? and if cache is hit ?

what is the TTFB if you disable ESI and object cache ?

So, you wanted TTFB data for various parameters.

All the below data is measured on same device + same browser with WiFi (80-100 Mbps). I used Brave Browser with Chrome’s Lighthouse for testing (Device set to mobile)

There you go for home page:

• LoggedIn + Cache Miss + LSCWP Deactivated: 10,500 ms
• LoggedIn + Cache Miss + LSCWP Active (ESI + Obj Cache Disabled): 11,500 ms
• LoggedIn + Cache Hit,Private + LSCWP Active (ESI + Obj Cache Disabled): 10,400 ms
• LoggedIn + Cache Miss+ LSCWP Active (ESI + Obj Cache Enabled): 12,180 ms
• LoggedIn + Cache HIT, Private + LSCWP Active (ESI + Obj Cache Enabled): 13,610 ms

For a blog post:

• LoggedIn + Cache Miss + LSCWP Deactivated: 870 ms
• LoggedIn + Cache Miss + LSCWP Active (ESI + Obj Cache Disabled): 760 ms
• LoggedIn + Cache Hit,Private + LSCWP Active (ESI + Obj Cache Disabled): 920 ms
• LoggedIn + Cache Miss + LSCWP Active (ESI + Obj Cache Enabled): 1,890 ms
• LoggedIn + Cache HIT, Private+ LSCWP Active (ESI + Obj Cache Enabled ): 1700 ms

emm? if I read the number correctly and just to confirm I understood the time unit correctly:

home page: no plugin is about 10 seconds , with plugin it’s about 10 – 13 seconds depends on setting

post: no plugin about 0.8 seconds , with plugin it’s about 0.7 – 1.8 seconds ?

Yes that is correct.

The numbers were suprising. I tried putting my site to complete conflict test and then switched off all plugins and all themes (Standard WordPress 2022 theme). Even then 0.6 seconds of TTFB (for the blog posts). With other plugins and themes it reaches till 1, and with LSCWP it reaches 1.4+

Hostinger Cloud Hosting support said 0.6s is “acceptable”, I don’t beliebe them. I was hoping my number would go down to less than 0.6 with LSCWP but they are getting worse in this particular area.

Please advice.

I am not much concerned about Home Page, because our site is not reliant on home page for conversions. But, I am very much concerned about the blogs. Please advice.

for the part cache miss , it will take pretty much same time as you without cache plugin , for that part I am not surprised

so if your page loads in 10 seconds without plugin , it takes 10 seconds or little bit more , is normal

what weirds me is the cache hit part

just make sure we are talking about the same thing , by TTFB , we are talking about this , right ?

Yes I suppose,

Lighthouse refers to it as “Initial Server Response Time”, but I assume TTFB and Initial Server Response Times are same thing. As mentioned previously, this time varies a lot between consecutive runs, but I am pretty sure that the Initial Server Response TIme gets slightly worse when LSCWP is active on my current settings. I was hoping that the time would improve rather than worse

Here’s a curious observation. I don’t know if it would help you or not, but I still thought you should have the complete picture.

The impact of themes and plugins is negligible for me. I deactivated all plugins (except Wordfence, security you know) and switched to default WordPress theme.

Even then my Initial Server Response Time was 0.62 sec. Activating LSCWP did improve it a bit (only LSCWP and WordFence active), but it still remained greater than 0.5s.

So, I believe that plugins and themes have nothing to do with it, it is just some better config in LSCWP that can do the trick. I have contacted support and they said to run DB optimizations which I did and had temporary performance gains but even they were diminished within few mins.

please create a ticket by mail to support at litespeedtech.com with reference link to this topic , we will investigate further.

• This reply was modified 1 year, 2 months ago by qtwrk.

Hi,

I would have created ticket, but as of now, I think I found the bottleneck.

My hosting provider asked me to disable WordPress cron and use their Linux cron, that improved performance.

Besides, you are right, ESI disabling slightly improves the TTFB (Still not enough)

Another quick question, my hosting provides in-built object caching. At the same time I have enabled WPLSC’s Object Caching using Memcached. What is better? Should I keep both on, or choose one of them (recommend which one in case only 1 is needed)

If this Object Caching sorts out, I think the performance gains would be enough to not need a ticket. Thanks

I don’t know what kind of “in-built” object cache that is , so I can’t say

you need to test it out yourself on this

but with my experience , object cache in wordpress is not that much improvement , I mean it does give certain help , but may not be as big as you expected , unless you can re-code all of your plugins/themes to properly and fully utilize the object cache features

Thanks it worked.

Your support was amazing, much appreciated.