Perf: Throttle parallel typechecks in Find All References - #20128
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Perf: Throttle parallel typechecks in Find All References#20128xperiandri wants to merge 2 commits into
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Fixes #20127
Problem
Project.FindFSharpReferencesAsynclaunched oneCancellableTaskper document in the project simultaneously viaCancellableTask.whenAll, causing an unbounded number of parallel typechecks (one per document) at once during Find All References / Rename.Fix
CancellableTask.whenAllThrottled maxDegreeOfParallelisminCancellableTasks.fs, using aSemaphoreSlimto cap concurrency while preserving cancellation semantics.Project.FindFSharpReferencesAsync(WorkspaceExtensions.fs), capping concurrency tomax 1 Environment.ProcessorCount.