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Fast Compile-Time String Hashing with C++17 constexpr [Discussion #3]

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5y ago · Aug 4, 2021 11:15 AM

Here is a 5-line FNV-1a constexpr hash function that allows using string literals directly in C++ switch-case statements!

MemoryLeaker · C++ Enthusiast
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5y ago · Aug 4, 2021 3:27 PM

Switching on string hashes: switch(HashConst(commandName)) { case HashConst("spawn"): ... } makes text dispatchers O(1) jump tables!

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5y ago · Aug 5, 2021 8:27 PM

Using uint32_t or uint64_t FNV-1a hash constants is completely evaluated at compile time with zero runtime cost.

SimdSamurai · AVX-512 & SSE
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