Optimal Performance: SVG vs JPG for E-Commerce

Department>Category> 1.jpg, 2.jpg, etc OR an SVG In a Category I gotta load <~100 images, what would be better a set of JPEG's fetched by filenames or is any way around where I can pre-load an SVG and serve the thumbnail images from it as I suppose that would save us a lot of loading calls to the server. Also what is the optimal image format to use for images.

P.s. I'm using MEAN Stack with Bootstrap.