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greg7mdp/parallel-hashmap

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A family of header-only, very fast and memory-friendly hashmap and btree containers.

10 mentions on Hacker News by 6 people: 3 stories, 7 comments · first 2019-03-31 · latest 2026-03-30

Mentions per year 10 mentions · busiest year 2019 (3)
20082026
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  1. Not really comprehesive. Doesn't include my favorite https://github.com/greg7mdp/parallel-hashmap which adds thread-safety to performance.
    comment by rurban · 2026-03-30 · in Comprehensive C++ Hashmap Benchmarks (2022)
  2. ConcurrentSwissMap exists for years already: https://github.com/greg7mdp/parallel-hashmap Just in C++, not Java.
    comment by rurban · 2026-01-01 · in Concurrent Hash Table Designs
  3. …the map can optionally be made thread safe and is apparently optimized for this usage. Details at: https://github.com/greg7mdp/parallel-hashmap?tab=readme-ov-f... .
    comment by BeeOnRope · 2025-01-07 · in Parallel-hashmap: drop-in replacement for unordered_map, unordered_set
  4. ▲ 62
    Parallel-hashmap: drop-in replacement for unordered_map, unordered_set
    story by klaussilveira · 2025-01-05 · 19 comments
  5. …notoriously slow anyway. A flat_hash_map from abseil or parallel-hashmaps[1] would be better. [1] https://github.com/greg7mdp/parallel-hashmap
    comment by dkersten · 2024-04-15 · in The One Billion Row Challenge in CUDA
  6. Then they should really try https://github.com/greg7mdp/parallel-hashmap , the current state of the art.
    comment by rurban · 2022-07-05 · in How to build a chess engine
  7. ▲ 3
    Parallel Hashmap
    story by cr4zy · 2022-04-23 · 2 comments
  8. Performance is very similar to my header-only version of the Abseil's hash tables available at https://github.com/greg7mdp/parallel-hashmap .
    comment by greg7mdp · 2019-04-27 · in Open-sourcing F14 for memory-efficient hash tables
  9. …want to try my version of the Abseil hash tables (I updated the code to make them header-only) at https://github.com/greg7mdp/parallel-hashmap .
    comment by greg7mdp · 2019-04-26 · in Open-sourcing F14 for memory-efficient hash tables
  10. ▲ 2
    New: A header-only, Abseil-derived hash table family
    story by greg7mdp · 2019-03-31 · 0 comments