Updates to Warm Page Load Tests
Background We have recently begun the process of updating our warm page load tests to be more representative of real user behavior. Cold page load is defined as the first … Read more
Articles in “Testing”
Upgrading Page Load Tests to Mitmproxy 7
Background mitmproxy is a third-party tool that we use to record and play back page loads in Firefox to detect performance regressions. The page load is “recorded” to a file: … Read more
What’s new in Perfherder?
Since last “What’s new in Perfherder” article a lot has changed. Our development team is making progresses towards automating the regression detection process. This post will cover the various improvements … Read more
Using the Mach Perftest Notebook
In my previous blog post, I discussed an ETL (Extract-Transform-Load) implementation for doing local data analysis within Mozilla in a standardized way. That work provided us with a straightforward way of … Read more
Dynamic Test Documentation with PerfDocs
After over twenty years, Mozilla is still going strong. But over that amount of time, there’s bound to be changes in responsibilities. This brings unique challenges with it to test … Read more
Improving Firefox Startup Time With The about:home Startup Cache
Don’t bury the lede We’re working on a thing to make Firefox start faster! It appears to work! Here’s a video showing off a before (left) and after (right): … Read more
Mach Perftest Notebook
Today at Mozilla, we constantly run “one-off” tests whose data always requires further analysis. The techniques used to analyze the data from these tests are quite similar to each other … Read more