message: Better comment in project.cc
diff: @@ -250,7 +250,10 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
  }
  }
  - // This is most likely the file path we will be passing to clang.
  + // This is most likely the file path we will be passing to clang. The
  + // path needs to be absolute, otherwise clang_codeCompleteAt is extremely
  + // slow. See
  + // https://github.com/cquery-project/cquery/commit/af63df09d57d765ce12d40007bf56302a0446678.
  if (EndsWith(arg, base_name))
  arg = cleanup_maybe_relative_path(arg);
  // TODO Exclude .a .o to make link command in compile_commands.json work.
  