Improve performance

Hi,

You should make sure that you are only running things when they need to.

For example, you should only run:
global $texonomy_slug;

On the specific pages when it is needed. Currently, it is running on every page load.

Therefore, I suggest that you look through your code properly for problems like there. Otherwise, great stuff!

https://www.ads-software.com/plugins/wp-custom-taxonomy-image/