Updating from Version 2.5.5 to Version 3.0.8 caused high processing

In your case switching back the caching method to “refresh cache” will have the same result like switching back to mashshare 2.5.5.

You find that setting on the general tab.

I have to investigate more why the async caching method increases your load. Usually there is only a very small increase in load once every 1 hour for new posts and once every 4 to 12 hours for older posts.

Are you using any caching plugin like w3 total?

Think i have found the issue. Will be fixed in next version

It would be excellent if you could give version 3.0.9 a try. You find it on github: https://github.com/mashshare/Mashshare

Please read here about how the async mode works, so you understand how to test that feature: https://www.mashshare.net/documentation/shares-are-not-updating-or-are-not-accurate/

Tl;dr:
After installation of the update purge your site cache and fill it again manually or by using any preload function. Than go to any posts and check the source code for something like:

var mashsb = {"shares":"305", ... REMOVED ... "refresh":"0"};

You see there a variable named refresh which must be 0 on initial load. This variable is for triggering the async cache refresh.

If its 1 and keeps 1 even after a page reload switch back to caching method “refresh while loading” and i investigate more into this.