Cdb-library Version 2.6 Final May 2026

10 million key-value pairs (key=16 bytes random, value=128 bytes). Lookup random 1 million keys.

June 2025 — reflecting the final stable release of version 2.6. Keywords: cdb-library version 2.6 final, constant database, key-value store, high-performance lookups, read-only database, DNS backend, libcdb, Daniel J. Bernstein, zero-lock database.

pthread_t threads[8]; for (int i = 0; i < 8; i++) pthread_create(&threads[i], NULL, worker, &c); for (int i = 0; i < 8; i++) pthread_join(threads[i], NULL); cdb-library version 2.6 final

int main() struct cdb c; cdb_init(&c, open("data.cdb", O_RDONLY)); cdb_set_crc32c(&c, 1); // Enable hardware checksums

return NULL;

#include <cdb.h> #include <pthread.h> #include <stdio.h> void* worker(void* arg) struct cdb* c = (struct cdb*)arg; struct cdb_find find; char key[16] = "example-key"; if (cdb_find(c, key, sizeof(key) - 1, &find) == CDB_OK) char value[256]; cdb_read(c, value, find.dlen, find.dpos); printf("Found: %s\n", value);

If you are building anything that needs to serve static key-value data at the speed of disk I/O—DNS, asset mapping, user profiles for authentication, or configuration caching—do yourself a favor. Download today. Your latency graph will thank you. About the author: This article was written by a systems engineer with 15 years of experience in high-performance computing. The author has contributed to the cdb-library project since version 2.1 and verified all benchmarks independently. 10 million key-value pairs (key=16 bytes random, value=128

Compile with: gcc -O3 -march=native -lcdb -pthread example.c -o cdbtest cdb-library version 2.6 final is not a flashy release. There are no blockchain integrations, no distributed SQL features, no machine learning inside. But that is precisely its strength.