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Top 9 C++ hash-map Projects
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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komihash
Very fast, high-quality hash function, discrete-incremental and streamed hashing-capable (non-cryptographic, inline C/C++) 27GB/s + PRNG
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fph-table
Flash Perfect Hash Table: an implementation of a dynamic perfect hash table, extremely fast for lookup
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a5hash
Ultra fast, high-quality hash function for hash-tables and hash-maps (non-cryptographic, inline C/C++) + PRNG
Project mention: "Ultimatively" fast, high-quality hash function for hash-tables and hash-maps | news.ycombinator.com | 2025-03-29 -
CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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HashTableBenchmark
A simple cross-platform speed & memory-efficiency benchmark for the most common hash-table implementations in the C++ world
C++ hash-map discussion
C++ hash-map related posts
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Fibonacci Hashing: An Optimization the World Forgot (Better Than Integer Modulo)
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How to create std::map that preserves the order of insertion just using standard C++?
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boost::unordered map is a new king of data structures
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Updating map_benchmarks: Send your hashmaps!
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Yes, this is embarrassingly slow .so I solved your problem
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Unum blog: Apple to Apple Comparison: M1 Max vs Intel. How a DDR5-powered MacBook beat a DDR4-powered MacBook and approached a $50K Server in Hash-Table Benchmarks
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Hacker News top posts: Dec 24, 2021
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A note from our sponsor - SaaSHub
www.saashub.com | 23 Apr 2025
Index
What are some of the best open-source hash-map projects in C++? This list will help you:
# | Project | Stars |
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1 | robin-map | 1,334 |
2 | sparsepp | 1,259 |
3 | Hopscotch map | 739 |
4 | ordered-map | 531 |
5 | komihash | 223 |
6 | fph-table | 42 |
7 | a5hash | 13 |
8 | qc-hash | 11 |
9 | HashTableBenchmark | 11 |