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0ae3368fb6
a) Remove 2 fields in our object representation: * PatchClass::library_data_ * Library::kernel_data_ => This saves O(#libraries + #patch-classes) which can amount up to 10+ MB for big apps, as we save not just the slots but the [ExternalTypedData] objects they used to reference. Instead we'll compute the KernelLibraryData when we need it by making a [TypedDataView] of sub parts of the component. b) We make a kernel binary be represented by a single [ExternalTypedData]. Whenever we need a sub-part of a kernel binary (e.g. one for each component for concatinated kernels, or one for a library inside a component) we use proper [TypedDataView]s for that. c) As we sometimes need to create a view of only a particular library within a component we need to find start/end of a library based on index. => We store the library index instead of the library offset on Library/PatchClass. => We can easily derive the start/end of a library from it's index by looking at the kernel component encoding. d) We make the [Reader] object work purely based on a pointer - instead of making it have if/else when reading bytes (either from pointer or from a view). e) We make the [KernelProgramInfo] store the kernel_component and various TD views into it. TEST=ci Change-Id: Ibe160881ff48635e834c3d647a977a144b5d0565 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/313561 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Slava Egorov <vegorov@google.com> |
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