Site optimization. What method?

Question

PHP

Good evening. Tell me how you can speed up a site on Drupal'e, which has a lot of pictures loaded on the main page? PNG pictures, weight from 5 to 10 kilobytes, 200 pictures, there will be more. The site loads in about 20-30 seconds. Of the third-party libraries, only Masonry. Modules are only basic, views, ctools, admin_menu... There is nothing so heavy.
Maybe there is a library for php or javascript? Or what advice would you give? Thank you.

Answer 1

asynchronous loading will help
here is an interesting plugin for jquery
www.appelsiini.net/projects/lazyload/enabled.html

Answer 2

Try the module https://www.drupal.org/project/lazyloader

Answer 3

Interestingly, 20-30 seconds is a lot. link please? maybe the problem is in the hosting?

Answer 4

Compress the size and quality of your images to the absolute minimum

Answer 5

ajax loading)