John Levandowski

Purges the nginx proxy cache when you publish or update a post or page. The cache will be purged for the:
<ul>
<li>Page or post you published or updated</li>
<li>Front page of your site</li>
<li>Posts page of your site (if enabled)</li>
<li>Feed of your site</li>
<li>Comments feed of your site</li>
</ul>

Nginx Proxy Cache Purge

Purges the nginx proxy cache when you publish or update a post or page.

Astral Internet

sleyeur

neutrall

The Website Accelerator by Astral Internet is a tool that allows you to place certain elements of a site in buffer memory (cache) inside the server. Once the elements are placed buffer of the server, they can be served much faster to people viewing a website. 
The website accelerator maximizes the Nginx caching feature while offering granular configuration for each site. More information concerning the WSA module is available on this blog “<a href="https://www.astralinternet.com/blog/en/no-more-slow-websites/" rel="nofollow ugc">No more slow websites!</a>”.

WSA – Website Accelerator Cache Purge

On servers using the website accelerator by Astral Internet, the module offers the ability to automatically purge the cache when a page is modified.

Nginx Proxy Cache Purge vs WSA – Website Accelerator Cache Purge