Really bad unwatch performance (3000%)

[lifeart]

Hello! Thank you for great work and all movements here!

I'm maintainer of https://github.com/lifeart/glimmer-next (glimmer-vm runtime alternative for Ember)
Repo using reactive approach very close to signals, based on this reactivity concept: lifeart/glimmer-next#41

I'm trying to be more native and experimenting with drop-in replacement with signals polyfill.
During testing I observe 10x performance degradation, especially on cleanup cases:

clearManyItems1End phase estimated regression +3750ms [3727ms to 3783ms] OR +3214.31% [3194.71% to 3242.69%]

artifact-1.pdf

here is PR i'm testing on: lifeart/glimmer-next#114

[littledan]

Thanks for reporting this! PRs welcome to improve performance.

[lifeart]

Linking one more issue: proposal-signals/signal-polyfill#2