Blog: speed optimization
While there are a number of factors that are involved with building brand recognition and achieving high conversion rates, great performance is universally regarded as one of the most important factors.
Virtually every study conducted on the subject cites decreasing tolerance of end-users for websites which don't perform well. There's simply no doubt that customers will not wait for a website to load, or for an app to function well.
Just as good performance has become required for optimal end-user experience, poor performance conveys to users a lack of sophistication and service capability.