Still enjoying this deep-dive post about Perceived performance and how humans flow through time calibreapp.com/blog/perceiv... - ThreadSky

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benschwarz.bsky.social • 45 days ago

Still enjoying this deep-dive post about Perceived performance and how humans flow through time

https://calibreapp.com/blog/perceived-performance

Comments

glenngillen.bsky.social•45 days ago

"Moreover, our timeliness expectation is tightly tied to how complex the interaction is supposed to be." This reminded me of one of the design decisions the Heroku founders would talk about in the early days - how much they tweaked the delay in the UI for adding an add-on.

glenngillen.bsky.social•45 days ago

Technically is was essentially instantaneous. At the time though, that was massively disconnected from the complexity expectations. Having it spin then fade in over a second or two and people went "wow, did it only take a second to provision a database?!".

glenngillen.bsky.social•45 days ago

Do it instantly and they think nothing has happened.

Anyways, the opposite direction of what you're trying to achieve. Just always found it an interesting anecdote around perception and performance.

benschwarz.bsky.social•45 days ago

Interactions are weird like that, you add a status loader (just in case the operation is delayed somehow) and when it’s too fast the visual flicker is super disorientating. Show not tell etc

ksylor.bsky.social•45 days ago

I successfully used this article to convince a backend team at work that they needed to set massively lower performance SLOs for their systems. The timing chart in particular was great - we used it to set front end goals too!

benschwarz.bsky.social•44 days ago

Very cool to hear this Katie 😎 made my day - and passed on to Karolina

ksylor.bsky.social•44 days ago

Pass along my most sincere thanks to her as well! Such a great resource

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