How to speed up OpenCart v. 2.2.0.0?

Question

opencart

I know that there are a lot of similar questions, but you are interested in complex solutions and complete solutions, what would you advise? What to cut, what to add, etc.

Answer 1

How did you determine that it is running slowly?
Measured the speed of work? Profiling? Does the server work slowly or do resources like js / css take a long time to load?
What extensions did you install? Ready themes? Have you looked at their code? Did you test the site without them? There is a difference?
You haven't provided any information.

Answer 2

first, try to follow the advice of the PageSpeed
​​service; if it doesn’t help, set up caching,
if it’s not enough, make sure that the indexes in the database tables are put on the necessary columns and
nothing helps to optimize select queries - moving to vds

Answer 3

Moving to PHP7 will be faster.

Answer 4

1 . We determine what slows down, in 99% of cases in version 2.2 the brakes appear on a large number of products due to incorrect requests, unfortunately it’s hard to treat, but the performance gain is large.
2 . Enable gzip
3 compression . Enable caching for browsers
4 . Optimizing image quality
5 . Compressing/optimizing and merging scripts and styles whenever possible
6 . Compressing/optimizing html
7 . Enable content caching and database query caching
From the last point, get the maximum increase, you can start with it, but then you probably won't do the rest :) I recommend the free module " DB Cache "