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Speeding Up Async Snippets

CSS Wizardry

The reason they give us this cumbersome snippet, and not a much more succinct , is purely historical: async snippets are a legacy performance hack. Generally speaking, blocking files are worse for performance, especially when hosted on someone else’s origin. For all major browsers, that date was 2011—over ten years ago.

Speed 301
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The psychology of site speed and human happiness

Speed Curve

In the fourteen years that I've been working in the web performance industry, I've done a LOT of research, writing, and speaking about the psychology of page speed – in other words, why we crave fast, seamless online experiences. In fairness, that was in the early 2000s, and site speed was barely on anyone's radar.

Speed 134
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USENIX LISA2021 Computing Performance: On the Horizon

Brendan Gregg

It's an exciting time for developments in computer performance, not just for the BPF technology (which I often [write about]) but also for processors with 3D stacking and cloud vendor CPUs (e.g., This was a chance to talk about other things I've been working on, such as the present and future of hardware performance.

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Poor Disk Performance

Brendan Gregg

People often tell me they don't understand performance tool output because they can't tell what's "good" or "bad." It can be hard as performance is subjective. Something like: It's called "[flying height]" or "fly height," and (from that reference) was about 5 nanometers for 2011 drives. Particles of dust can be 1000x bigger.

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Re-imagining your DevOps tools to build a next generation delivery platform

Dynatrace

At Perform 2021, Dynatrace product manager Michael Winkler sat down with Atlassian’s DevOps evangelist, Ian Buchanan, to talk about how you can achieve speed, stability, and scale in your DevOps toolchain as you optimize your practices on the path to self-service. How to approach transforming your DevOps processes.

DevOps 216
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USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon

Brendan Gregg

At USENIX SREcon22 APAC I gave the opening keynote on the future of computer performance, rounding up the latest developments and making predictions of where I see things heading. This talk originated from my updates to [Systems Performance 2nd Edition], and this was the first time I've given this talk in person! Or even on a plane.

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SEO and web performance: What to measure and how to optimize

Speed Curve

But Google's prioritization of page speed in search ranking isn't new, even for mobile. Keep reading to find out: How much does web performance matter when it comes to SEO? Which performance metrics should you focus on for SEO? How can you track performance for SEO? Great performance isn't a substitute for poor content.