[PATCH] D53322: [clangd] Collect refs from headers.

[Haojian Wu via Phabricator via cfe-commits]

hokein added a comment.

For references, the binary-format index file (for whole llvm project) size:

| Before | WithRef |
| 50MB   | 91MB    |


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D53322