2017 Benchmarking Latency Metrics 
Alex Russell
MARCH 6, 2021
TL;DR: A lot has changed since 2017 when we last estimated a global baseline resource per-page resource budget of 130-170KiB. The scale of the effect can be deeply situational or hard to suss out without solid metrics. The Moto G4 , for example. Performance work often focuses on high percentile users (the slowest), after all.
The Netflix TechBlog
OCTOBER 19, 2020
If we had an ID for each streaming session then distributed tracing could easily reconstruct session failure by providing service topology, retry and error tags, and latency measurements for all service calls. Using simple lookup indices in Cassandra gives us the ability to maintain acceptable read latencies while doing heavy writes.
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Alex Russell
OCTOBER 22, 2017
— Alex Russell (@slightlylate) October 4, 2017. Budgets are scaled to a benchmark network & device. This helps support executive sponsors who then have meaningful metrics to point to in justifying the investments being made. This matters because all script loading delays the metric we value most: Time to Interactive.
CSS - Tricks
APRIL 1, 2021
Site performance is potentially the most important metric. A 2017 study by Akamai says as much when it found that even a 100ms delay in page load can decrease conversions by 7% and lose 1% of their sales for every 100ms it takes for their site to load which, at the time of the study, was equivalent to $1.6
Alex Russell
APRIL 29, 2021
As an engineer on a browser team, I'm privy to the blow-by-blow of various performance projects, benchmark fire drills, and the ways performance marketing (deeply) impacts engineering priorities. With each team, benchmarks lost are understood as bugs. Another window into this question is provided by the Web Confluence Metrics project.
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