Jigoshop is consistently slowing down page load times; about +1 second on my server. Switch it off, speed goes up, switch it on, speed goes down.
Compared to WP E-Commerce, its fast as lightning though.
There shouldn't be anything in Jigoshop itself which is causing it to load pages slowly - certainly we haven't experienced any problems during testing or had anything similar reported.
Yeah; the Jigoshop devs did not even catch the bug that the pagination on the product page (in the admin section) did not work. That tells me that they are testing with shops having 30 products tops. That's just pathetic.
It's a shame that the e-commerce plugins out there are all so poorly engineered.