Speed problem

Attributes shouldn’t cause a significant slowdown. Use your browsers console to see what is loading slow – Chrome > Developer > Javascript Console > Network tab.

> And it can be a problem that the descriptions of the products must have images from a foreign website.

Import them to your own site or use a CDN if thats an issue.

You can also try:

https://ww.wp.xz.cn/plugins/wp-clean-up/

and

https://ww.wp.xz.cn/plugins/artiss-transient-cleaner/

to clean up caches.