Page Loading Time will cost you big time.
According to surveys done by Akamai and Gomez.com, nearly half of web users expect a site to load in 2 seconds or less, and they tend to abandon a site that isn’t loaded within 3 seconds. 79% of web shoppers who have trouble with web site performance say they won’t return to the site to buy again and around 44% of them would tell a friend if they had a poor experience shopping online.
This means you’re not just losing conversions from visitors currently on your site, but that loss is magnified to their friends and colleagues as well. The end result – lots of potential sales down the drain because of a few seconds difference.