Prioritized Task Scheduling API is Prototyped in Nightly
In bug 1734997, we prototyped the Prioritized Task Scheduling API. Having the API prototyped empowers us to experiment with the benefits of this API. It is enabled by default in … Read more
Performance Sheriff Newsletter (March 2022)
In March there were 175 alerts generated, resulting in 21 regression bugs being filed on average 5.4 days after the regressing change landed. Welcome to the March 2022 edition of … Read more
Performance Sheriff Newsletter (February 2022)
In February there were 122 alerts generated, resulting in 19 regression bugs being filed on average 4.3 days after the regressing change landed. Welcome to the February 2022 edition of … Read more
Performance Sheriff Newsletter (January 2022)
In January there were 161 alerts generated, resulting in 20 regression bugs being filed on average 13.4 days after the regressing change landed. Welcome to the January 2022 edition of … Read more
Performance Tools Newsletter (Q4 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 Q4 2021. You can find … Read more
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