Performance Sheriff Newsletter (September 2020)
In September there were 153 alerts generated, resulting in 25 regression bugs being filed on average 7.75 days after the regressing change landed. Every time a code is pushed to … Read more
Four pillars of Android performance
This summer, I had the pleasure of interning at Mozilla with the Android Performance Team. Previously, I had some experience with Android, but not particularly with the performance aspect except … 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
What’s new in Perfherder?
Perfherder is one of the primary tools used by our performance sheriffs to triage and investigate regression (and improvement) alerts. It’s also a key part of the workflow any Firefox … Read more
Improving Firefox Page Load
Introduction Over the summer of 2018 we formed a new performance team at Mozilla. Our first objective was to better understand what performance means to our users.. We talked to … Read more
Profiling media workloads in Firefox
It will come as no surprise that playing video and audio in a web browser requires a certain attention to performance. Whether it is by getting the design right, using … 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
Greg Mierzwinski [:sparky]
I’m Greg Mierzwinski ([:sparky] on Riot), and I am a Performance Test Engineer working on the Performance Testing (perftest) team led by Dave Hunt. I work on various components, but … Read more