One thing worth trying out as well are the folly::F14 hashmaps (https://github.com/facebook/folly/blob/master/folly/container/F14.md https://github.com/facebook

One thing worth trying out as well are the folly::F14 hashmaps (https://github.com/facebook/folly/blob/master/folly/container/F14.md https://github.com/facebook/folly/blob/master/folly/containe...), which has a roughly similar design. You can find some discussions on the performance tradeoffs by the SwissTable and F14 authors at https://groups.google.com/forum/#!msg/hashtable-benchmarks/-nT-3fESXq8/1ckpGBiAAgAJ https://groups.google.com/forum/#!msg/hashtable-benchmarks/-....