Why does it take so long to switch tabs?

Question

Layout

Need advice
I made tabs in the block "HOLLYWOOL YARN INTERNET STORE"
Switching between tabs, my content takes a very long time to load.
Please help me figure it out.
Here is the site: hollywool.egliens.ru
NB! There is 100% content, you need to scroll and click into the empty space.
There is the same site, but there is the same block, somehow it loads faster:
whollywool.egliens.ru
Thanks in advance to those who will respond.

Answer 1

Try to hide blocks not with display: none; but in another way