0c527e1b9f
The default `MapBase.entries` and `MapBase.values` maps over the keys and does lookups. It is faster to scan the data like `get keys`. This is essentially the dart2js version of https://github.com/dart-lang/sdk/commit/23a98d808c0 Change-Id: I03894efda459d9a4f7f07c4c79524ba5e4d925cb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/399027 Reviewed-by: Mayank Patke <fishythefish@google.com> Commit-Queue: Stephen Adams <sra@google.com>