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0 pointstomnipotent6y ago0 comments

The only people I see obsess over these metrics have either their ego or pay tied to them.

> Do you actually go interview users on what they perceive?

Yes, regularly, because that's what effective teams do. I also limit bandwidth to 3G and record the sessions so that everyone can share in the learnings, which very rarely circle back to things like TTFB/TTI.

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2 comments · 1 top-level

lhorie6y ago· 1 in thread

Interesting! How do you iterate / keep track of regressions?

tomnipotentOP6y ago

Speedcurve.com - download the data and then use basic outlier detection on the time series as well as individual observations looking for anything out of the ordinary. Most of the time it was marketing uploading a 20MB PNG to the CMS, other times it's some 3rd party JavaScript (looking at your Criteo) doing something questionable.

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