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Adding a new data structure just for this feels like such an AI thing. I've added to our agents.md a rule to prefer using existing libraries and types, otherwise Gemini will just happily generate things like this.

Right, and also this would show up in the profiler if it were a time sink — and I'm 100% certain this code has been profiled in the 10 years it's been in the codebase.

There’s clearly functionality to push more work to the current window’s queue, so I would not be surprised if the data structure needs to be continually kept sorted.

(Somewhere in the pile of VSCode dependencies you’d think there’d be a generic heap data structure though)