Anna Gringauze
9f65693f57
ExpressionCompiler currently translates offsets of scopes to line numbers during the binary search in the library in order to find the inner-most scope containing the line where debugger has stopped. This results in many offset-to-line translations per evaluation request, each translation also performing a binary search in Source.lineStarts table. To make scope lookup more efficient, this change uses Source.lineStarts table to find the offset for the debugger stop once, and uses integer offset comparisons instead in the scope binary search. Closes: https://github.com/dart-lang/sdk/issues/40281 Change-Id: I72052b144d15acef684a5f8d29b40f6c5774b723 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142461 Commit-Queue: Anna Gringauze <annagrin@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
Dart Kernel
Dart Kernel is a small high-level language derived from Dart. It is designed for use as an intermediate format for whole-program analysis and transformations, and to be consumed by codegen and execution backends.
The kernel language has an in-memory representation in Dart and can be serialized as binary or text.
Both the kernel language and its implementations are unstable and are under development.
This package contains the Dart part of the implementation and contains:
- A transformable IR for the kernel language
- Serialization of kernel code
Note: The APIs in this package are in an early state; developers should be careful about depending on this package. In particular, there is no semver contract for release versions of this package. Please depend directly on individual versions.
See ast.dart for the in-memory IR, or binary.md for a description of the binary format. For now, the textual format is very ad-hoc and cannot be parsed back in.