Jens Johansen
dfba8a7ca9
These are from `_Array.iterator` whereas the previous ones was from, iirc, `List.iterator`. * 7.41mb Import.finalizeImports * 1.13mb FindTypeVisitor.visitInterfaceType * 856.39kb new NamedTypeBuilderImpl * 815.92kb BodyBuilder.createSuperParametersAsArguments (values from uprobe) When compiling the CFE with the CFE I get this: ``` msec task-clock:u: -5.6347% +/- 0.5257% (-321.96 +/- 30.04) (5713.89 -> 5391.92) page-faults:u: 5.9842% +/- 0.0970% (6310.26 +/- 102.33) (105449.48 -> 111759.74) cycles:u: -6.0829% +/- 0.5338% (-1447602857.06 +/- 127036484.81) (23797839542.02 -> 22350236684.96) instructions:u: -4.9550% +/- 0.0008% (-1364113249.40 +/- 214444.14) (27529935457.16 -> 26165822207.76) branch-misses:u: -5.7909% +/- 2.2880% (-5395643.76 +/- 2131857.44) (93173948.12 -> 87778304.36) seconds time elapsed: -5.6275% +/- 0.5257% (-0.32 +/- 0.03) (5.72 -> 5.40) seconds user: -6.0582% +/- 0.5861% (-0.33 +/- 0.03) (5.47 -> 5.13) Scavenge( new space) goes from 63 to 61 Evacuate(store buffer) goes from 2 to 3 MarkSweep( old space) goes from 1 to 0 ``` As before the changes here are mostly "bogus" and likely caused by the GC being weird, see also https://dart-review.googlesource.com/c/sdk/+/438722 and https://dart-review.googlesource.com/c/sdk/+/438681. It does seem to consistently change the number of new space GCs though (65 -> 63 -> (here) 61). Change-Id: I18ef712394c1d98b8ed15c7fe6c4ac32fa9bc2e3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/438682 Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Chloe Stefantsova <cstefantsova@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.