Compitible with Google Pagespeed mod

Hi,

I alwasy want the beinifit of Google Pagespeed mod ( https://www.modpagespeed.com/ ).

However, some pictures in image slider does not optimized by the Pagespeed mod. Could you please fix this problem.

Some info might be useful:
https://stackoverflow.com/questions/35987065/google-pagespeed-lazyload-jquery-masonry-conflict