In reports of the analyzer being slow we've seen `edit.getFixes` causing
a long queue because they take longer to execute than the wait before
the next one comes in.
While we haven't been able to reproduce that, this CL adds a benchmark
that fires *a lot* of both `edit.getFixes` (seen in reports from users)
and `edit.getAssists` (which seems, locally at least, to happen every
time the cursor moves), and debounces them, changing the benchmark
results from
```
4 files / CodeType.ImportCycle:
Initial analysis: 1.322030
Completion after change: 3.096128
4 files / CodeType.ImportChain:
Initial analysis: 1.361750
Completion after change: 3.500849
4 files / CodeType.ImportExportCycle:
Initial analysis: 1.349346
Completion after change: 3.065497
4 files / CodeType.ImportExportChain:
Initial analysis: 1.367151
Completion after change: 3.246891
4 files / CodeType.ImportCycleExportChain:
Initial analysis: 1.360573
Completion after change: 3.393901
```
to
```
4 files / CodeType.ImportCycle:
Initial analysis: 1.322070
Completion after change: 0.546532
4 files / CodeType.ImportChain:
Initial analysis: 1.410870
Completion after change: 0.649789
4 files / CodeType.ImportExportCycle:
Initial analysis: 1.349923
Completion after change: 0.741040
4 files / CodeType.ImportExportChain:
Initial analysis: 1.360396
Completion after change: 0.638332
4 files / CodeType.ImportCycleExportChain:
Initial analysis: 1.354682
Completion after change: 0.658086
```
Change-Id: Icb0423133726e02e08e204b1c59209264889f8a6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413682
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Phil Quitslund <pquitslund@google.com>
Jens Johansen
3873af28e9