My site had really slowed down and in the end I found it to be attributed to changing my permalinks to:
/%postname%/
a better permalink structure is:
/posts/%postname%/
per WP Codex as explained here:
So really, don’t use just /%postname%/ as your permalink structure. | Digging into WordPress
and here:
Category in Permalinks Considered Harmful » Otto on WordPress
Using:...