drosophila

This plugin increases your website’s performance by reducing image size without an apparent change for the human eye. 
You can choose from 100 several compression levels and see a preview before make the changes permanent.
SEO Importance
Page load time is a measurement of the length of time it takes for your entire website to load a page and display it to a visitor. 
It is also an important factor when it comes to SEO, as page load times help determine your website’s position in search results. 
Google has used site speed as one of the major benchmarks for website rankings since an update of their search ranking algorithms in early 2010.

WP Boyka

This plugin increases your website's performance by reducing image size without an apparent change for the human eye.

WP Boyka vs Super Page Cache