it’s taking a lot of time to load images in the before and after slider

Hello,

I was facing a critical loading time issue with my site , so i compressed each and every media file present on my website .

After compressing each and every image present on my website , images are loading pretty fast ,But the images which are there in before and after plugin is taking a lot of time to load ,which is creating a lag .As you can notice on my website .

please consider this issue in your next update
thank you

The page I need help with: [log in to see the link]