Changing the agregator plugin

After last couple of days, I notice that my site load is much more slower.

After fiddle around, I found that the rss agregator plugin does the culprit. It fetch the whole rss content from the source site every time this site opened.

Searching for similar plugin, I found this one, it took the offload of my site by serving the feed that has been cached locally.

Now my site is back on track...