While deserializing AOT snapshot, Code objects which do not contain
valuable information besides entry point and stack maps are discarded
and not allocated on the heap (they are replaced with
StubCode::UnknownDartCode()).
PC -> Code/CompressedStackMaps lookup is implemented using a separate
table (InstructionsTable).
Flutter gallery in release-sizeopt mode:
Heap size of snapshot objects: arm -26.89%, arm64 -27.68%
Large Flutter application in release mode with --dwarf-stack-traces:
Heap size of snapshot objects: -24.3%.
Discarded Code objects: 72.5% of all Code objects.
Issue: https://github.com/dart-lang/sdk/issues/44852.
TEST=existing tests; "--dwarf_stack_traces --no-retain_function_objects
--no-retain_code_objects" mode is enabled for a few tests.
Change-Id: I5fe3e283630c8e8f4442319d5dcae38d174dd0d8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/189560
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
The type signature of throwsNSME needs to be specified so that map and
list literals appearing later in the source file have their types
correctly inferred.
Change-Id: Ifa60670dc5fb7d39b6f8f028e1b55152e736554c
Reviewed-on: https://dart-review.googlesource.com/19480
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
This change makes big_integer_arith_vm_test strong-mode compatible, and allows
dartdevc/dart2js to build and run big_integer tests where they can.
New issue 30170 filed to track DDC big integer handling.
BUG=
R=rnystrom@google.com
Review-Url: https://codereview.chromium.org/2978013002 .
Alexander Markov