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slightlylate's profile
Alex Russell
Alex Russell
Alex Russell
@slightlylate

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Alex Russell

@slightlylate

Chrome Project 🐡 & Web Standards TL; Blink API OWNER Named PWAs w/ @phae; probably making her ☕ DMs open. Tweets my own; press@google.com for official comms.

San Francisco, The Internet
infrequently.org
Joined December 2010

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    1. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      Let's have a quick (long?) chat about web performance. I have the unique situation of seeing data from billions of performance profiles as we help customers with @raygunio's Real User Monitoring look to improve user experience. #webdev #PerformanceMatters #webperf

      2 replies 13 retweets 23 likes
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    2. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      1. Many folks still think a synthetic test is a Good Thing. That is, pinging a website from a fixed set of servers. It's better than naught, but it's a pretty poor proxy for real customer experience. You're measuring data center to data center performance (even if nerfing perf)

      1 reply 0 retweets 1 like
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    3. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      2. Even with nerfing perf, you're talking high quality interconnects between DCs. This compares poorly, to say, what an actual user experiences on a 3G phone while roaming around somewhere. You're not getting realistic numbers.pic.twitter.com/4SYUFZlvoC

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    4. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      3. Your only real way to understand performance is to track what the end users load time actually is (hence the 'Real User' in 'Real User Monitoring'). I'm surprised how many folks don't use a product like this, or confuse it with web analytics.

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    5. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      4. Software developers tend to still think performance is something that happens on the server. It ain't 1999, the web has changed. Nearly always, it's not the server these days - it's the front end. Those web frameworks you love so much are shifting the problem to the user.

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    6. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      5. You know what's terrible about that? You don't see the problem. So you assume it doesn't exist, while users get really annoyed at your poor performing site.pic.twitter.com/ixWFfr7aB7

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    7. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      6. "But JD, I use our site, I see the perf!" Sorry, very unlikely you do - you're a software developer who likely has a top 1% computer, likely on a higher grade internet connection, etc. You are not representative of your user base. Use actual data, not your experience.

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    8. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      7. Here's an example which is actually pretty good compared to what I normally see. Notice that the largest time for this page is in the web-render. It's not the server time. Just like JS Crash Reporting, if you're not tracking this, you likely don't have a clue how bad it is.pic.twitter.com/DRRbXaUEqH

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    9. John-Daniel Trask‏ @traskjd 14 Aug 2018
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      8. So what's the core cause? All these heavy JS frameworks, bundling everything, too much JS. As cool as you think new-JS framework is, I doubt you're evaluating based on impact on the customer. Too many devs care about new-shiny and not business/user value.

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    10. Robert Coup‏ @amatix 15 Aug 2018
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      Replying to @traskjd

      If you don’t follow already: @slightlylate has the metrics, insight, & experiences wrt this. Low-end android devices are horrific, and they’re what the next billion users are running.

      1 reply 0 retweets 0 likes
      Alex Russell‏ @slightlylate 15 Aug 2018
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      Replying to @amatix @traskjd

      They're also what many Americans and Europeans are carrying every day. This isn't so much about geography as it is about class and access.

      8:36 AM - 15 Aug 2018
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      • John-Daniel Trask Robert Coup
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