Does an Eltron template slow your site?

I found a new template - Eltron

Has anyone used this already? My site is quite slow with the current template (according to gmetrix and I want it to be faster. I hope this new template works better, but still have some doubts about purchasing.

Worth noting that the theme (regardless of which) you choose is only one of many different things they will impact your site speed and that some of those tools like gtmetrix can give warped views of what is actually happening