On the Benefits of Speedy Software, and How It Affects User Perception of Engineering Quality and Overall Usability (craigmod.com) 140
Craig Mod: I love fast software. That is, software speedy both in function and interface. Software with minimal to no lag between wanting to activate or manipulate something and the thing happening. Lightness. Software that's speedy usually means it's focused. Like a good tool, it often means that it's simple, but that's not necessarily true. Speed in software is probably the most valuable, least valued asset. To me, speedy software is the difference between an application smoothly integrating into your life, and one called upon with great reluctance. Fastness in software is like great margins in a book -- makes you smile without necessarily knowing why. [...]
Speed and reliability are often intuited hand-in-hand. Speed can be a good proxy for general engineering quality. If an application slows down on simple tasks, then it can mean the engineers aren't obsessive detail sticklers. Not always, but it can mean disastrous other issues lurk. I want all my craftspeople to stickle. I don't think Ulysses (a popular text editing application) is badly made, but I am less confident in it than if it handled input and interface speed with more grace. Speed would make me trust it more.
Speed and reliability are often intuited hand-in-hand. Speed can be a good proxy for general engineering quality. If an application slows down on simple tasks, then it can mean the engineers aren't obsessive detail sticklers. Not always, but it can mean disastrous other issues lurk. I want all my craftspeople to stickle. I don't think Ulysses (a popular text editing application) is badly made, but I am less confident in it than if it handled input and interface speed with more grace. Speed would make me trust it more.