This episode of Two Minute Tech Tuesdays is about request coalescing, a core feature in Varnish that is used to reduce the stress on origin servers when multiple requests are trying to fetch the same uncached content.

In this week's episode of Two Minute Tech Tuesdays, we're looking at parallel ESI (Edge Side Includes).

For many years, we’ve fielded questions about which is better, Varnish or NGINX? We’ve always affirmed that both are great but for very different things. They aren’t identical solutions and don’t do identical things. And sometimes, they can be used in complementary ways to get the most from both.

If you’re familiar at all with Varnish, you know it improves content delivery performance by storing a copy of your content in cache, and every request thereafter is fulfilled by the cached content.