Use optimized images. For example even this placeholder (1000x1000px 86KB) http://heloiise.com/wp-content/uploads/2016/11/05.jpg?id=4344 it is 86KB but you don’t need so big placeholder because max width of you block is 535px http://prntscr.com/dfmbvq If you change the size to 555x555px and save the image as for web the size will be 5KB http://prntscr.com/dfmd0e Do you feel the difference? Optimize all the images you plan to use for your site. There are a lot of optimization services, https://kraken.io/ for example and etc. Also, there are a lot of information about image optimization on the Internet. You should understand that every excess KB slows down your site.
