Ten Posts Later: What I'd Do Differently
Looking back at a collaborative canvas app, the decisions that held up, the ones that didn't, and what's still broken.
#canvas
6 posts
Cursors Are Not Part of the Document
Presence looks like the easiest feature in a collaborative app. It has the tightest constraints of anything in the system.
Real-Time Collaboration Is Not Just Sending Updates
Two people editing the same canvas is not a networking problem. It's an agreement problem.
Why Freehand Drawing Becomes a Bottleneck
Freehand input looks simple, but the amount of data it generates can quickly overwhelm your rendering system.
Inside the Rendering Engine of a Canvas App
Rendering isn’t just about drawing shapes. It’s about controlling how much work happens per frame.
What Building a Drawing App Taught Me About Performance
Performance issues don’t show up immediately, they build up quietly until your assumptions stop working.