[PATCH] D155675: [DWARFLinkerParallel] Switch to xxh3_64bits

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
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xxh3 is substantially faster than xxh64.
For lld `.debug_str` there is substantial speedup (D154813 <https://reviews.llvm.org/D154813>).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155675

Files:
  llvm/include/llvm/ADT/ConcurrentHashtable.h
  llvm/include/llvm/DWARFLinkerParallel/StringPool.h


Index: llvm/include/llvm/DWARFLinkerParallel/StringPool.h
===================================================================
--- llvm/include/llvm/DWARFLinkerParallel/StringPool.h
+++ llvm/include/llvm/DWARFLinkerParallel/StringPool.h
@@ -27,7 +27,7 @@
 public:
   /// \returns Hash value for the specified \p Key.
   static inline uint64_t getHashValue(const StringRef &Key) {
-    return xxHash64(Key);
+    return xxh3_64bits(Key);
   }
 
   /// \returns true if both \p LHS and \p RHS are equal.
Index: llvm/include/llvm/ADT/ConcurrentHashtable.h
===================================================================
--- llvm/include/llvm/ADT/ConcurrentHashtable.h
+++ llvm/include/llvm/ADT/ConcurrentHashtable.h
@@ -77,7 +77,7 @@
 public:
   /// \returns Hash value for the specified \p Key.
   static inline uint64_t getHashValue(const KeyTy &Key) {
-    return xxHash64(Key);
+    return xxh3_64bits(Key);
   }
 
   /// \returns true if both \p LHS and \p RHS are equal.


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