Update CHANGES.md

planetarium · Apr 25, 2019 · 367f092 · 367f092
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@@ -58,6 +58,8 @@ To be released.
     became to validate only the next block to be appended.  [[#210]]
  -  Improved `BlockChain<T>.Fork()` performance by avoiding double validation
     of already validated blocks.  [[#215]]
+ -  Removed unnecessary reader lock on `BlockChain<T>.StageTrasactions()`.
+ -  Improve concurrency of `BlockChain<T>.GetState()`.
 
 [#185]: https://github.com/planetarium/libplanet/pull/185
 [#187]: https://github.com/planetarium/libplanet/issues/187