Litespeed Cache is a component built into Litespeed Webserver. Litespeed Cache will return the results for the first user to access your website. And will return that result to the people behind that time you want. This means that your VPS server only needs to compile PHP for the first user; only the second access user will be able to use the results of the first person.
Some of the benefits Litespeed cache offers are:
- Accelerate HTML return for users
- Reduce a load of CPU processing when there is a large amount of traffic
- Optimize VPS resources due to unused VPS VPS and still meet large access
- Google appreciates the low server response time
Memcache is Object Cache Mechanism which is to store previously executed database quarries in order to reduce query execution time for upcoming database quarries.
If I am correct, then...
When you enable Lightspeed cache plugin along with it's memcache feature; it would be more beneficial.
You should not use Lightspeed cache plugin along with memcache plugin; i.e. If you wish to enable lightspeed cache plugin ... first disable and de-activate previous memcache plugin.
Also, make sure that your hosting account has Lightspeed web server[Apache]; else lightspeed cache plugin will not deliver best results.
some features are like double edge sword; be careful with features that you choose to enable/disable.
Citing the following article https://www.bgocloud.com/blog/litespeed-web-hosting-boosted-website-performance/ - ''LiteSpeed Cache Solution is tailored to provide the best performance in a shared hosting environment, thus accelerating you WordPress, Joomla, Magento, Drupal, or custom website. ... And statistics show it is up to 800% faster than Apache while serving static website content and up to 60% faster when serving PHP requests.
When you install LiteSpeed Web Server it will take your Apache settings and processes them thanks to its event-driven architecture. This will allow for faster responses and efficient memory consumption. Subsequently, the server can go to as far as eight times faster and handle the concurrent client with less CPU usage.''
Litespeed cache (LSCache) is great, but requires a Litespeed server (based on Apache). If your hosted on a Litespeed server and using Worpdpress your host probably already installed the wp plugin. If LSCache is available, use it, do not use other cache plugins.