Please, pay attention that the theme affects the speed of your site on the last term because the Olympus theme itself is pretty light. However, taking into account that it comes together with plugins and extensions, it makes a theme package quite heavy. Such plugins as BuddyPress, Youzify, Unison are already complex solutions, so if they are packed with a theme, they need extended resources.
We decided to unite the most useful advice on how to increase your WordPress site speed score in this article. Please, check out the following suggestions.
Since the site speed depends on your host's most of the other factors, please, mind that not each host fits the social network site. So, if it is not powerful enough, don't expect that you can increase the speed significantly in other ways. Besides, note that your site speed also depends on your host location and could differ at times due to your server load at an exact moment.
Keeping unwanted plugins on your WordPress websites will add a tremendous amount of junk to your web files. Besides, it will also increase the size of your backup and put an overwhelming amount of load on your server resources while backup files are being generated.
90% of issues are successfully resolved after theme updating. Although a theme affects the site speed as a last resort, we always try to optimize it in each update. So, keeping your site up-to-date is significantly important for its seed.
Sometimes improper settings of your caching plugin could make your site even slower. Moreover, it should be adjusted for your host's needs and hosting possibilities.
We hope this advice could help you to accomplish the speed you expected :)