Wordpress website speed is not easy because some particular plugins always can't give good speed results !

wordpress website speed increase is now a days is big concern to business owners, as this is bit tough job - because no one can tell - some particular plugin always can't give good speed results !  

Analyze your site’s speed :::
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1. https://gtmetrix.com/
> for gTmetrix // sign up and use api // to get best result

2. https://developers.google.com/speed/pagespeed/insights/

3. LightHouse Chrome Extenson: https://chrome.google.com/webstore/detail/lighthouse/blipmdconlkpinefehnmjammfjpmpbjk/related?hl=en

4. Pingdom: https://tools.pingdom.com/

5. WaterFall Catcher: https://www.webpagetest.org

Clause: 01 // For all site – at first use – w3 Total Cache // free version
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1. w3 TOTAL CACHE
//work on cache, CSS & JS, HTML & XML Files
1. performance> general settings::
I. page cache –> enable …> save all changes
II. database cache –> enable …> save all changes
II. object cache –> enable …> save all changes
IV. miscellaneous –> disable gogle page speed dashboard widget > save

2. performance> browser cache::
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FOR General::::: >> tick first 6 points
v Set the Last-Modified header
v Set expires header
v Set cache control header
v Set entity tag(Etag)
v SetW3 Total Cache header
v Enable HTT(gzip) compression

3. performance> page cache ( check – first 6 points – given tick) – of not – then tick first 6 points > save

5. At wp dashboard(Top) > performance> purge modules > page cache all
6. At wp dashboard(Top) > performance> purge all caches > ALL SET

7. performance> user agents group >
I. group name > tablet > enable > theme: show active theme >
I. group name > mobile > enable > theme: show active theme > save setting and purge

Clause: 02// WP ROCKET > Settings > LazzY Load
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2. WP ROCKET

from dashboard top > WP ROCKET > Settings > Lazzt Load
BASIC > LazyLoad:
“>> Tick -> Enable for images
>> Tick -> Enable LazyLoad for iframes and videos Enable for iframes and videos”

Mobile cache:
Enable -> caching for mobile devices
Enable -> Separate cache files for mobile devices

UserCache
Enable -> Enable caching for logged-in WordPress users

SSL cache:
Enable -> Enable caching for pages with https://

Emoji cache: Enable (By default)
Use default emoji of visitors’ browser instead of loading emoji from WordPress.org

Embedded: 
>> Disable WordPress Embeds

Cache lifespan: >>
Cache lifespan: 10 hours

WP ROCKET > Settings > Static Files

Minify files >>
HTML
CSS (must – see what is the state of the website – after caching of CSS)

Combine files:
Google Fonts – Enable
CSS – Enable

Remove query strings:
Enable -> Remove query strings from static resources

Render-blocking CSS/JS:
Enable -> Load CSS files asynchronously

WP ROCKET > Settings > PRELOAD
Sitemap preloading:
Enable -> Activate sitemap-based cache preloading
Preload bot -> Enable -> Automatic

Clear cache – finally by WP ROCKET 
wp dashoard > at top > wp rocket > clear cache
wp dashoard > at top > wp rocket > purge opcache/ preload cache
MUST DELETE – W3 TOTAL CACHE – IF IT IS INSTALLED 

LightHouse Chrome Extensions
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get lighthouse:
https://chrome.google.com/webstore/detail/lighthouse/blipmdconlkpinefehnmjammfjpmpbjk?hl=en

What is LightHouse Chrome Extensions: 
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Lighthouse is a third party of Google page speed checker and this third party has a Chrome extension which is known as Lighthouse Chrome extension.
extension can check the speed of a website from browser and contract the issues of the website for bad speed
and those issues can be fixed easily by some free plugins.