ilya-biryukov added inline comments.

================
Comment at: clangd/index/Background.h:121
   bool ShouldStop = false;
-  std::deque<Task> Queue;
+  std::list<std::pair<Task, ThreadPriority>> Tasks;
   std::vector<std::thread> ThreadPool; // FIXME: Abstract this away.
----------------
kadircet wrote:
> ilya-biryukov wrote:
> > Why not `std::deque`?
> because we can insert in the middle of the queue now, when we skip existing 
> high priority tasks. 
`deque::insert` is `O(smaller of the distances to either begin or end)` and we 
spend the same time on the linear search anyway.
I believe we can keep it, even though I'm not strictly sure which is more 
efficient (we certainly don't care)


Repository:
  rCTE Clang Tools Extra

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55315/new/

https://reviews.llvm.org/D55315



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