Rust API for the Firefox Profiler
Firefox Profiler is a tool for analyzing the performance of both websites and Firefox itself. You can visit profiler.firefox.com to learn more about and enable it. Inside the Firefox codebase, … Read more
Another Step in Automating the Pageload Recordings
Background In a previous article, Kimberly Sereduck told us about Updates to Warm Page Load Tests and how we are continuously working to make our tests more representative of real … Read more
Performance Sheriff Newsletter (December 2021)
In December there were 159 alerts generated, resulting in 22 regression bugs being filed on average 5.1 days after the regressing change landed. Welcome to the December 2021 edition of … Read more
Performance Sheriff Newsletter (November 2021)
In November there were 147 alerts generated, resulting in 22 regression bugs being filed on average 3.5 days after the regressing change landed. Welcome to the November 2021 edition of … Read more
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
Performance Sheriff Newsletter (October 2021)
In October there were 303 alerts generated, resulting in 45 regression bugs being filed on average 5.2 days after the regressing change landed. Welcome to the October 2021 edition of … Read more
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
Performance Tools Newsletter (Q3 2021)
As the Perf-Tools team, we are responsible for the Firefox Profiler. This newsletter gives an overview of the new features and improvements we’ve done in Q3 2021. This is our … Read more
Performance Sheriff Newsletter (September 2021)
In September there were 174 alerts generated, resulting in 23 regression bugs being filed on average 6.4 days after the regressing change landed. Welcome to the September 2021 edition of … Read more
Performance Sheriff Newsletter (August 2021)
In August there were 126 alerts generated, resulting in 16 regression bugs being filed on average 3.6 days after the regressing change landed. Welcome to the August 2021 edition of … Read more
Reducing the Overhead of Profiling Firefox Sleeping Threads
The Firefox Profiler and its overhead Firefox includes its own profiler: Visit profiler.firefox.com to enable it, and the user documentation is available from there. The main advantages compared with using … Read more
Performance Sheriff Newsletter (July 2021)
In July there were 105 alerts generated, resulting in 20 regression bugs being filed on average 6.6 days after the regressing change landed. Welcome to the July 2021 edition of … Read more