[analyzer] E2E benchmark also supports legacy protocol Also add benchmark where lots of hover requests are fired, mimicking IntelliJ behavior when holding ctrl and moving the mouse over imports. I'm getting these results on my machine: ``` 4 files / CodeType.ImportCycle: Initial analysis: 1.249438 Completion after change: 10.143719 4 files / CodeType.ImportChain: Initial analysis: 1.367604 Completion after change: 9.936909 4 files / CodeType.ImportExportCycle: Initial analysis: 1.233644 Completion after change: 10.011695 4 files / CodeType.ImportExportChain: Initial analysis: 1.226382 Completion after change: 9.875991 4 files / CodeType.ImportCycleExportChain: Initial analysis: 1.262932 Completion after change: 9.995607 ``` notice the low number of files (in the chain*) or if it even is a chain etc doesn't appear to change anything for the time it takes to become responsive again. Notice that in https://github.com/dart-lang/sdk/issues/55281#issuecomment-2700500279 I noticed that something similar happened for `edit.getFixes`, but I'm yet to actually reproduce that. Change-Id: Iff04124825c6ea2f759b4d048a0f2988709eaebf Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413981 Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Phil Quitslund <pquitslund@google.com>
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