It is as usual that website may runs slow after a wordpress update. The reason behind the slow loading of website after a wordpress update are -
- poor quality hosting
- No caching in place.
- No content delivery network to reduce loan on the hosting.
- no image compression or optimization has been done.
- old version of HTML.
- The version of PHP becomes old.
- you have slow or out of date plugins.
You should find the solutions for these too.
