The Dart VM's AOT compiler has support for emitting binary size information for all the code that gets generated. This information can then be visualized.
Our AOT compiler accepts an extra --print-instructions-sizes-to=sizes.json
flag. If supplied the AOT compiler will emit binary size information for all generated functions to sizes.json
.
This flag can be passed to gen_snapshot
directly, or to the various wrapper scripts (e.g. pkg/vm/tool/precompiler2
):
% tools/build.py -mrelease -ax64 runtime_kernel dart_precompiled_runtime % pkg/vm/tool/precompiler2 --print-instructions-sizes-to=hello_sizes.json hello.dart hello.dart.aot
To visualize the information emitted by the AOT compiler one can use our binary size analysis tool:
% dart pkg/vm/bin/run_binary_size_analysis.dart hello_sizes.json hello_sizes Generated file:///.../sdk/hello_sizes/index.html % chrome hello_sizes/index.html