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Performance

April 3

The key to understanding your end user? Performance monitoring

We’re constantly monitoring our CDN’s performance from as many locations and network providers around the world as possible. Monitoring performance matters — not just for your servers and…

March 30

The benefits of using Varnish

At the core of Fastly is Varnish, an open source web accelerator that’s designed for high-performance content delivery. Varnish is the key to being able to accelerate dynamic content, APIs…

March 18

Common causes of a poor cache hit ratio and how to deal with them

The cache hit ratio (or hit ratio for short) is the ratio of hits to cacheable requests (hits and misses combined). There's also cache coverage, the ratio of cacheable requests to all…

January 27

Analyze your origin logs to get a higher cache efficiency

If you want to increase the efficiency of your Varnish (or Fastly) cache, you need to figure out what traffic is not cached. By definition, any traffic that reaches your origin is not cached…

January 9

Accelerating Rails, Part 2: Dynamic HTTP Caching

In the second part of our series on accelerating Rails, I'll cover configuration of a few Fastly features, Varnish and Varnish Configuration Language (VCL), and strategies for caching…

December 15

Normalizing the Host Header

In the continued quest to increase cache hit ratios, the chant is: "Normalize, normalize, normalize." Less variation in your requests means you have a higher chance of getting hits. This…

November 19

Accelerating Rails, Part 1: Built-in Caching

Caching is one strategy that helps ease scaling pains that I often see Rails developers overlooking. Starting out with caching can be confusing, because terms and documentation can be…

November 17

Using ESI, Part 2: Leveraging VCL and ESI to Use JSONP

In this post, I’m going to discuss how you can leverage ESI and VCL (Varnish Configuration Language, the domain-specific language that powers Fastly’s edge scripting capabilities) to use…

October 27

Improving the Delivery of Large Files With Streaming Miss and Large File Support

Today, we’re excited to announce two related features that lower bandwidth costs and reduce origin load for Fastly customers, resulting in faster downloads for their users: Streaming Miss…

October 22

New Gzip Settings and Deciding What to Compress

Fastly recently conducted an extensive analysis of which resources should be compressed. Today, the results of that analysis are reflected in the Fastly app, which allows our customers to…

October 2

Caching the Uncacheable - Hooman Beheshti's Talk at Velocity NYC 2014

Hooman Beheshti, VP of Technology at Fastly, recently gave a talk at Velocity NYC 2014 about the challenges CDNs face with dynamic content and how businesses can use programmatic means to…