YaRN : store rope scaling type as int32_t in memory #5285
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ggerganov
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Feb 3, 2024
hodlen
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Apr 1, 2024
* YaRN : store rope scaling type as int32_t in memory * llama : store mapped names as const char *
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I recently noticed the comment in 8f961ab directed at me. My first experience with C++ was on embedded devices, so sometimes I forget just how cheap memory is on PCs - we are loading multi-gigabyte models from disk, after all. There really is no need to store hyperparameters in 8-bit ints and bitfields - on the contrary, it makes the struct layout more confusing, and can hurt performance for frequently accessed values.
This PR changes rope_scaling_type to be an int32_t in memory, and makes rope_finetuned a proper
boolinstead of a bitfield.As a more useful optimization, the name maps are stored as
const char *, so the functions that use them are operating directly on the string literals instead of copies. std::string has an overload of operator== to compare withconst char *, so this can't hurt performance. And many uses were calling c_str() anyway, so this simplifies the code a bit.