[lld] [llvm] [lld][MachO] Follow-up to use madvise() for threaded file page-in. (PR #157917)

[John Holdsworth via llvm-commits]

johnno1962 wrote:

Another more speculative commit, multi-threading the opening of files by making macho::readFile() thread safe. Another 1.5 second reduction of time spent linking my example Chrome task.

Thu Sep 18 11:07:02 be7af98b9a94bdb40a918130189544c8ab5232cd
0m10.548s 0m10.581s 0m10.748s 0m10.485s 0m10.486s 0m10.619s 0m10.434s 0m10.682s


https://github.com/llvm/llvm-project/pull/157917