Why slows down the site on Opencart on shared hosting?

Question

opencart

Hello everyone, there is an online store on virtual hosting (the tariff is one of the lowest) cms Opencart, there are modules accelerators and cachers, after clearing the cache, the page opens for the first time for about 10 seconds, then quickly from the cache. The hoster says that I have not exceeded the load limits. Tell me if changing the hosting provider or switching to VPS will speed up the site, or do you still need to optimize the site?

Answer 1

So it is the first time and must slowly open

Answer 2

Can you tell me if changing the hosting provider or switching to VPS will speed up the work of the site, or do you still need to optimize the site?

You should always start with CMS optimization. First time and should take longer to open. Otherwise, what is the cache for?
Try another hosting. You don't need VDS.

Answer 3

A lot of owners of online stores based on Opencart are faced with such a problem with a large number of products!
The answer to this problem in 90% is the lack of indexes in mysql. You can find the manual at this link .
For the remaining 10%, most likely you just need to change the hosting provider to a faster one, but it is better to use a VPS with guaranteed resources