Online shopping is now a very common behavior for citizens in developed countries. Many shopping websites are competing to get customers.
One of the crucial points is the speed of downloading the site. A study suggests there is a threshold of three seconds. If forced to wait over three seconds, viewers are likely to leave this page.
Amazon has understood this rule at the very early stage of the internet era. Indeed, I have no memory of being annoyed by delayed loading of its homepage.
The Sydney Morning Herald: Amazon's 'secret weapon': understanding how website experience can influence shoppers
In general, the more pictures the web page includes, the more time required for the page to appear. But, it is not the only factor to determine the speed of downloading. Some providers, including Amazon, seem to have optimized the structure for quick loading.
Nowadays, the internet speed has been accelerated by hundreds of times. Nonetheless, we are still enslaved by the curse of the speed.