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One of my favorite (short) talks on this topic. Well worth a few minutes of your time: https://www.youtube.com/watch?v=coNDCIMH8bk https://www.youtube.com/watc

• Aengeuad 8y ago
  I know it's in the spirit of the talk, but the histogram at 10:45 and the related discussion about how the latency improved for most users but the average latency increasing meaning a worse experience for other users reminds me of the anecdote a Google engineer had when Youtube started rolling out their HTML5 player, the responsiveness of the page had increased but the average latency graphs went up. This wasn't down to it being a bad update, or some users getting a worse experience - not really anyway, but the switch to the HTML5 player allowed a wider audience to start using Youtube where they wouldn't have been able to do this previously. A change increasing average latency, even on a histogram, doesn't necessarily mean it's a bad change. Look at your data indeed.