> For a very long time people on HN claim VSCode is about as fast as Sublime The trouble is that "fast" is an insufficient word to describe a piece of software

> For a very long time people on HN claim VSCode is about as fast as Sublime The trouble is that "fast" is an insufficient word to describe a piece of software. As everyone has certainly realized by now, software feels "fast" when it is very responsive, e.g. the latency is low, and Sublime Text certainly felt "fast". However, Sublime Text regularly ran into problems where it had too much algorithmic complexity, e.g. when dealing with pathological cases like extremely long lines or something like that. Basic editing could become slow or you might even need to force close it. Not great. VSCode feels reasonably responsive, at least, it certainly feels more responsive than you'd expect what is effectively a web app strapped to a browser to feel. A lot of effort was put into the feel of Monaco and keeping the text editing relatively unblocked. But maybe most importantly, careful optimization made VSCode perform well in a lot of scenarios where even native code software like Sublime and Kate struggled, with very fast Find and Replace that could gracefully handle pathological cases and a document structure that was good at loading, displaying and editing large documents (and with some limits applied to try to prevent pathological cases from blowing up the user's editor window.) Zed is off to a good start because it takes a lot of learnings from VSCode and others. In my opinion though, it doesn't really feel dramatically better than VSCode, as the day-to-day UX is just less polished over all. It is, however, very promising, as it certainly feels better than VSCode did in the early days of it.