From 4cafc2d2c5b863f7a7a59bdc5df1b7894719f76b Mon Sep 17 00:00:00 2001 From: Simon Cruanes Date: Thu, 19 Mar 2026 21:16:46 -0400 Subject: [PATCH] change cchash constant from murmur2 --- src/core/hash_stubs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/core/hash_stubs.c b/src/core/hash_stubs.c index f0ac1bdf..c0d217a3 100644 --- a/src/core/hash_stubs.c +++ b/src/core/hash_stubs.c @@ -19,7 +19,10 @@ #include #include -#define HASH_MUL UINT64_C(0xd6e8feb86659fd93) +// from murmur2: https://chromium.googlesource.com/external/smhasher/+/c8e8bf81bc6041d6d836365a501a0a96830d2d81/MurmurHash2.cpp +#define HASH_MUL UINT64_C(0xc6a4a7935bd1e995) + +// from murmur3: https://github.com/aappleby/smhasher/blob/master/src/MurmurHash3.cpp#L81 #define FMIX_C1 UINT64_C(0xff51afd7ed558ccd) #define FMIX_C2 UINT64_C(0xc4ceb9fe1a85ec53) @@ -31,6 +34,7 @@ static inline uint64_t hash_combine(uint64_t state, uint64_t chunk) return state; } +// fmix64 from murmur3 static inline uint64_t fmix64(uint64_t h) { h ^= h >> 33;