efficient/libcuckoo

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1744 stars · 290 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

libcuckoo is a high-performance, compact concurrent hash table implemented in C++ using cuckoo hashing. It is a header-only library that supports multiple concurrent reader and writer threads.

Use cases

• concurrent key-value lookups in a multithreaded C++ application
• high-throughput in-memory hash table for caching
• replace std::unordered_map with a thread-safe alternative
• build a concurrent index or deduplication store
• benchmark concurrent hash table performance

When to choose

• you need a fast, thread-safe hash table in C++ without external dependencies
• your workload has many concurrent readers and writers
• you want a header-only, easily embeddable data structure

When to avoid

• you need a persistent or distributed key-value store
• you only need single-threaded hashing where std::unordered_map suffices
• you need a hash map with rich APIs like ordered iteration or LRU eviction

Facets

library · maturity stable

concurrency caching developer-tools developer-tools performance cpp cross-platform hash-table cuckoo-hashing header-only concurrent-data-structures key-value-store algorithms linux macos

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