Looking at the Network traffic (can do it really easy in Chrome) Developer Tools>Network tab, select Images (at the bottom), you can see GET requests for the background images repeating every 'Time between slides'.

For the performance reasons and ease up on traffic, I would suggest to pre-load images.
Maybe the way it is done in 'Views Slideshow: Cycle'.

Alternatively, should you have different point of view, I would make it one more feature/control available when configuring Backstretch.

Besides module is great, simple to use and install. Congratulations.

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yannickoo’s picture

yannickoo
Location Berlin
CreditAttribution: yannickoo commented
Status: Active » Closed (won't fix)

Hey Michael,

sorry for the delayed answer. I took a look at jQuery Backstretch's source code and found this line here, seems like we don't have to take care about preloading because it's already done by the jQuery plugin.