tree dc06ab7564b14332c1ef1b7af019c6ae67270efa
parent 75e098bf43c0d997e3280b7eb8f95843b85b3358
author Eric Liu <ioeric@google.com> 1537349704 +0000
committer Eric Liu <ioeric@google.com> 1537349704 +0000

[clangd] Store preamble macros in dynamic index.

Summary:
Pros:
o Loading macros from preamble for every completion is slow (see profile).
o Calculating macro USR is also slow (see profile).
o Sema can provide a lot of macro completion results (e.g. when filter is empty,
60k for some large TUs!).

Cons:
o Slight memory increase in dynamic index (~1%).
o Some extra work during preamble build (should be fine as preamble build and
indexAST is way slower).

Before:
{F7195645}

After:
{F7195646}

Reviewers: ilya-biryukov, sammccall

Reviewed By: sammccall

Subscribers: MaskRay, jkorous, arphaman, kadircet, cfe-commits

Differential Revision: https://reviews.llvm.org/D52078

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@342529 91177308-0d34-0410-b5e6-96231b3b80d8