[PATCH] D91028: [llvm-objcopy][NFC] replace class Buffer/MemBuffer/FileBuffer with streams.

[Sam Clegg via Phabricator via llvm-commits]

sbc100 added a comment.

> We could not use the memory-mapped file for writeUniversalBinaryToStream() since we do not know the final size.

Is there some fundamental reason why you can't determine the final output size?  In lld (wasm-ld at least) we go to some lengths to determine the final size before writing, basically for this reason.    IIUC using a memory mapped output file has some big wins.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91028/new/

https://reviews.llvm.org/D91028