related posts without db

I see that any related posts plugin slows site down
is there anyway we have related posts without db

if by "db" you mean database then you could set up your categories as folders and use php to get other articles from same folder as the current article. But that would end up as kind of a mess in the long run.
I would rather use a db and get related posts with ajax once the user has scrolled down the page..thus you let the page initially load without the extra calls for related posts

Does the plugin you're using have built-in caching?

cloaking said:

Does the plugin you're using have built-in caching?

Click to expand...

I tried yarrp and contextaul related posts
both have caching
still hostgator dont allow them

Are you using word press? jet pack have related post feature.