[PATCH] D94606: [clangd] Move DirBasedCDB broadcasting onto its own thread.

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
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This is on the critical path (it blocks getting the compile command for
the first file).

It's not trivially fast: it involves processing all filenames in the CDB
and doing some IO to look for shadowing CDBs.

And we may make this slower soon - making CDB configurable implies evaluating
the config for each listed to see which ones really are owned by the
broadcasted CDB.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94606

Files:
  clang-tools-extra/clangd/GlobalCompilationDatabase.cpp
  clang-tools-extra/clangd/GlobalCompilationDatabase.h
  clang-tools-extra/clangd/unittests/GlobalCompilationDatabaseTests.cpp

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