Trying to Decide Between Reverse-proxy and Multisite

We have a very large blog at mainsite.com

We want to create a tool at mainsite.com/tool/ that will be it's own Wordpress site and doesn't need to share anything with mainsite.com

But it is very important that the /tool/ doesn't slow down mainsite.com and doesn't really affect it at all.

Is it better to convert mainsite.com to a multisite or to use a reverse-proxy to have /tool/ as a directory?

Thanks!

Topic proxy directory multisite seo Wordpress optimization

Category Web

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