I’ve been a long time fan and reader of High Scalability, a blog about building bigger, faster, more reliable websites. It’s a great resource for anyone who cares about building websites at scale.
Yesterday, I had the privilege of writing a guest post for them titled, Averages, Web Performance Data, And How Your Analytics Product Is Lying To You. I wrote about the importance of looking beyond averages when looking at your performance data. I also talked about the importance of using Real User Measurement to make sure the numbers you are looking at are accurate.
For people who care about performance, it’s important to use a RUM product that gives you a complete view into what’s going on. You should be able to see a histogram of the loading times for every visitor to your site. You should be able to see your median load time, your 99th percentile and lots of other key metrics that are far more actionable than just looking at an average.
You can read the full article here.