tree cd7774d77f341ad9c5b32be87f16c2b4f61bdaf3
parent b3b528648b0c3f64c36014ae5bbee66b5437d765
author Konstantin Shcheglov <scheglov@google.com> 1527957906 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1527957906 +0000

Use known FileState from FileSystemState directly.

We check all known files now, so we don't need looking up FileState(s)
by paths. It is expensive when we do it for thousand files in multiple
drivers.

Stopwatch is also not free, so now we check it every 100 files.

This makes _FilesReferencingNameTask about 4 times faster.
In total search of an element in a priority file is 2 times faster.

R=brianwilkerson@google.com

Change-Id: I2738df8035f84d20a8b7e1b6d3040d4461c2609d
Reviewed-on: https://dart-review.googlesource.com/58141
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>