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Yes, this is one of the best and fastest webapp out there, and yet dragging a selection in that app on my top-of-the-line computer feels more sluggish than doing the same thing in GIMP on a 2010 netbook.

Clearly a lot of effort went into making Photopea, but that performance gap doesn't feel like it's ever going to be plugged, no matter how clever we get at using HTML.

https://www.gamedeveloper.com/design/3d-engine-entirely-made...

this is Doom engine in Excel

difference being its an esoteric experiment. and that webapp is used regularly used by thousands.

naive of you to even compare both.

No ad hominem please. Both examples are cool apps built with the foundation layer not designed for the task.

- text markup language isn't a good choice for modern performant graphics editing apps.

- excel sheet isn't a good choice for 3d game engine.

The difference here lays only in the fact that for Doom 3D engine, authors had another choice.

It is a nice app because it follows desktop app standards: a menu bar on top, floating windows, a document area, toolbars around it etc.

It may be a little slower than native desktop apps, but that is to be expected, since it relies upon an interpreted language.