emhash
unordered_dense
| emhash | unordered_dense | |
|---|---|---|
| 2 | 12 | |
| 411 | 730 | |
| - | - | |
| 8.1 | 7.1 | |
| 3 days ago | 25 days ago | |
| C++ | C++ | |
| MIT License | MIT License |
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emhash
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Inside boost::unordered_flat_map
me author of emhash, I make some optimiazation of swiss table emilib https://github.com/ktprime/emhash/blob/master/thirdparty/emilib/emilib2o.hpp
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Advancing the state of the art for <code>std::unordered_map</code> implementations
O(1) iteration is fine in my flat hash map https://github.com/ktprime/emhash/blob/master/hash_table8.hpp
unordered_dense
- unordered_dense: A Fast & Densely Stored Hashmap And Hashset Based On Robin-Hood Backward Shift Deletion
- unordered_dense: A fast, densely stored hashmap based on backward shift deletion
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boost::unordered standalone
That's deprecated. Use https://github.com/martinus/unordered_dense instead And yes, tell use if it's any better(it should)
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Is there an accepted way to order qualifiers?
No, I've deprecated it because the code has become a mess, I rewrote it quite differently and with much higher code quality and more features here: https://github.com/martinus/unordered_dense
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Effortless Performance Improvements in C++: std::unordered_map
When no ordering is necessary and the number of elements is larger than 20, nothing beats https://github.com/martinus/unordered_dense (for general use).
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Effortless Performance Improvements in C++: std:unordered_map
https://github.com/martinus/unordered_dense
Check this one out, it's a successor to this idea. Boost also introduced a very performant flat_hash_map in 1.81
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Fuzzing is Cool, Actually
I have an API fuzz test for a hash map here: https://github.com/martinus/unordered_dense/blob/main/test/fuzz/api.cpp
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A container with set interface based on std::vector
That sounds a bit like ankerl::unordered_dense::set: https://github.com/martinus/unordered_dense
- Inside boost::unordered_flat_map
- martinus/unordered_dense v1.4.0: A fast & densely stored hashmap, Now with heterogeneous overloads
What are some alternatives?
robin-map - C++ implementation of a fast hash map and hash set using robin hood hashing
unordered - Boost.org unordered module
STC - A modern, user friendly, generic, type-safe and fast C99 container library: String, Vector, Sorted and Unordered Map and Set, Deque, Forward List, Smart Pointers, Bitset and Random numbers.
hashtable-benchmarks - An Evaluation of Linear Probing Hashtable Algorithms
robin-hood-hashing - Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20
flat_hash_map - A very fast hashtable
parallel-hashmap - A family of header-only, very fast and memory-friendly hashmap and btree containers.
Klib - A standalone and lightweight C library
Hopscotch map - C++ implementation of a fast hash map and hash set using hopscotch hashing