[mgilardi]

Browser benchmark

The canvas renderer and the 1,000-node switch had only been timed in Node, which says nothing about painting or dropped frames.

• apps/playground/bench.html (built with the playground) pans, zooms and scrolls made-up trees of 125 to 10,000 tips, as SVG and on the canvas, and times every frame. It runs in any browser: press Run, then save the numbers.
• node scripts/bench-browser.mjs runs it in the Chrome already installed, headless, at pixel density 1 and 2 and with the main thread slowed 4 times, and writes docs/benchmarks-browser.md. --from <file> adds a section from numbers saved in another browser. It uses a throwaway profile that it deletes, listens on this machine only and sends nothing anywhere.

First numbers (headless Chrome 157, M2 Max, other work running, one run of each):

	SVG kept 60 frames a second up to	Canvas
Pixel density 1 and 2	1,999 nodes (about 30 a second at 4,999)	every size, up to 19,999 nodes
Main thread slowed 4 times	499 nodes (58% of frames late at 999)	every size, up to 19,999 nodes

The switch stays at 1,000 drawn nodes. The React README says it has room to spare on a fast machine, is a little high for a slow one, and suggests trying canvasThreshold={500} there.

Moving a departed person's proposals

A host asked how to move a departed person's accepted proposals to another account. Payload refuses any change to author and decidedBy, and that stays. The plugin README now says the lock is a hook, so a host makes the move in its own database code, changes only those two fields, and leaves proposal, checksum and the snapshot alone. A new test makes that move on MongoDB and checks that the proposal still matches its checksum, the version made from it still verifies, and the proposal stays locked. No plugin code changed. An option to allow the move through Payload was considered and not built; ADR 0012 says why.

Tested

• pnpm build, pnpm typecheck, pnpm test (527 tests, one new), the leak check and the OneOrigin check pass locally.
• The benchmark ran twice in full, under an hour apart, and agreed on which sizes kept up.

Not tested

• The benchmark page and script have no tests of their own (docs/test-audit.md says why).
• Nothing was measured in WebKit (Safari and the Mac app), Firefox, a window on a real screen, a real slow device, or radial layouts.
• The new plugin test runs on MongoDB only.

🤖 Generated with Claude Code