move to an infinite queue for binding callbacks

[andydotxyz]

Fixes #1838

Checklist:

• Tests included.
• Lint and formatter run with no errors.
• Tests all pass.

[andydotxyz]

I can’t quite make sense of the benchmark results because the way the code changed impacts how it is reported, but it looks like CPU-wise a similar speed. However it requires more memory than the previous version, though of course it scales based on how many items you simultaneously trigger

[fpabl0]

LGTM

[andydotxyz]

Thanks for the 👍 @fpabl0. This has now been open for comment for over 7 days so we'll merge it and test through release process. Better solutions may be found for future releases.