Jens Johansen
c812abd7bf
When compiling the cfe with an aot-compiled cfe this removes ~43 mb of context allocations in `BinaryPrinter._ensureCanonicalName` and has these changes when benchmarking: ``` msec task-clock:u: -5.0067% +/- 0.6053% (-288.75 +/- 34.91) (5767.31 -> 5478.56) page-faults:u: 2.7077% +/- 0.1426% (2942.48 +/- 155.01) (108670.96 -> 111613.44) cycles:u: -5.3274% +/- 0.6265% (-1278360098.44 +/- 150341087.36) (23995901283.80 -> 22717541185.36) instructions:u: -4.3319% +/- 0.0009% (-1195734804.64 +/- 241700.46) (27602908367.64 -> 26407173563.00) branch-misses:u: -3.4011% +/- 3.0065% (-3245774.08 +/- 2869267.25) (95434325.44 -> 92188551.36) seconds time elapsed: -5.0025% +/- 0.6041% (-0.29 +/- 0.03) (5.77 -> 5.48) seconds user: -5.3148% +/- 0.6838% (-0.29 +/- 0.04) (5.52 -> 5.22) Scavenge( new space) goes from 65 to 64 MarkSweep( promotion) goes from 10 to 9 Evacuate(store buffer) goes from 2 to 1 ``` although most of it is probably a happy accident with the GCs. Compiling the analysis server only gives: ``` page-faults:u: 0.6385% +/- 0.1266% (1058.68 +/- 209.95) (165813.00 -> 166871.68) instructions:u: -0.0158% +/- 0.0005% (-6794934.20 +/- 222091.71) (42904117069.28 -> 42897322135.08) Scavenge( new space) goes from 103 to 101 ``` Change-Id: I85ceece0df699bb2393f3ab72fe6130134b49132 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/438681 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Jens Johansen <jensj@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.