fbcode/cachelib/allocator/nvmcache/TombStones.h (#441)

Summary: Pull Request resolved: #441

Reviewed By: MatzeB

Differential Revision: D101369846

fbshipit-source-id: b2bd902a2216947fc90cca05dcd9878c54eef14d

Author: generatedunixname1395027625275998

cachelib/allocator/nvmcache/TombStones.h

@@ -42,12 +42,7 @@ class alignas(folly::hardware_destructive_interference_size) TombStones {
   // @return a valid Guard representing the tombstone
   Guard add(folly::StringPiece key) {
     std::lock_guard l(mutex_);
-    auto it = keys_.find(key);
-
-    if (it == keys_.end()) {
-      it = keys_.insert(std::make_pair(key.toString(), 0)).first;
-    }
-
+    auto [it, inserted] = keys_.try_emplace(key, 0);
     ++it->second;
     return Guard(it->first, *this);
   }