dblaikie added inline comments.

================
Comment at: clang-tools-extra/clangd/index/Serialization.cpp:32
+llvm::compression::CompressionAlgorithm *StringTableCompressionScheme =
+    new llvm::compression::ZlibCompressionAlgorithm();
+
----------------
ckissane wrote:
> dblaikie wrote:
> > We're generally trying to avoid global ctors in LLVM. So at most this 
> > should be a static local variable in a function that accesses the algorithm 
> > (though perhaps these "compression algorithm" classes shouldn't be 
> > accessible directly, and only through singleton accessors in the defined 
> > alongside - like there's no reason for LLVM to contain more than one 
> > instance of ZlibCompressionAlgorithm, I think?)
> your idea seems correct to me, however
> some algorithms, such as zstd, support running in multiple threads, so this 
> might influence our decision.
So long as the compression algorithm objects are stateless, this would be 
acceptable - such objects would be thread safe for multiple concurrent users.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D130516/new/

https://reviews.llvm.org/D130516

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