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. To update our global baseline from 2017, we want to update our priors on a few dimensions: The evolved device landscape. Hardware Past As Performance Prologue. The Moto G4 , for example. Hard Reset.

Performance 124

Performance Network Cache Metrics 124

Alex Russell

APRIL 29, 2021

After 20 years of neck-in-neck competition, often starting from common code lineages, there just isn't that much left to wring out of the system. Consistent improvement is the name of the game, and it can still have positive impacts, particularly as users lean on the system more heavily over time. Trusted Types. CSS Container Queries.

Media 145

Media Games Education Engineering 145

Alex Russell

JANUARY 30, 2024

HTML, CSS, images, and fonts can all be parsed and run at near wire speeds on low-end hardware, but JavaScript is at least three times more expensive, byte-for-byte. decoding="async" loading="lazy" /> Google spent more on the SoC for the Pixel 4a and enjoyed a later launch date, boosting performance relative to the A51.

Performance 90

Performance Network Mobile Speed 90

O'Reilly Software

APRIL 4, 2018

Google founders figured out smart ways to rank websites by analyzing their connection patterns and using that information to improve the relevance of search results. Are there inherent time relationships in the messages that need to be preserved as they travel across the system? Back in the days of Web 1.0, Clean and reprocess it?

Architecture 80

Architecture Scalability Google Operating System 80

Alex Russell

FEBRUARY 21, 2023

Recall that Cupertino manages the actual work of Safari engineers through Apple-internal systems (previously named "Radar" ), making public bug reports a sort of parallel track; once an issue is imported from a public bug to a private tracker, it's more likely to get developer attention. This was all considered at length.

Energy 79

Energy Games Engineering Design 79

Smashing Magazine

JANUARY 21, 2021

After the latest redesign in late 2017, it was Ilya Pukhalski on the JavaScript side of things (part-time), Michael Riethmueller on the CSS side of things (a few hours a week), and yours truly, playing mind games with critical CSS and trying to juggle a few too many things. The performance distribution for Largest Contentful Paint in 2020.

Performance 145

Performance Cache Mobile Network 145

Alex Russell

OCTOBER 22, 2017

— Alex Russell (@slightlylate) October 4, 2017. Tools and CI systems help them monitor progress & prevent regressions. Our metrics at Google show a conflicted picture (which I’m working to get to clarity on). Some systems show median RTTs near ~100ms for 3G users. Maybe "ambush by JS"? First Load.

Performance 68

Performance Benchmarking Network Mobile 68

Smashing Magazine

JANUARY 7, 2019

On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing times (we’ll talk about them in detail later). Gatsby.js (React), Preact CLI , and PWA Starter Kit provide reasonable defaults for fast loading out of the box on average mobile hardware. But this consideration needs to be deliberate.

Performance 103

Performance Cache Metrics Network 103