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Reduce model loading time #43

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Merged
merged 3 commits into from
Mar 13, 2023
Merged

Reduce model loading time #43

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640fd77
Use buffering
maekawatoshiki Mar 12, 2023
efaa30e
Use vector
maekawatoshiki Mar 13, 2023
3419f88
Minor
ggerganov Mar 13, 2023
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4 changes: 4 additions & 0 deletions main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,10 @@ struct llama_model {
bool llama_model_load(const std::string & fname, llama_model & model, gpt_vocab & vocab, int n_ctx) {
printf("%s: loading model from '%s' - please wait ...\n", __func__, fname.c_str());

std::vector<char> f_buf(1024*1024);

auto fin = std::ifstream(fname, std::ios::binary);
fin.rdbuf()->pubsetbuf(f_buf.data(), f_buf.size());
if (!fin) {
fprintf(stderr, "%s: failed to open '%s'\n", __func__, fname.c_str());
return false;
Expand Down Expand Up @@ -311,6 +314,7 @@ bool llama_model_load(const std::string & fname, llama_model & model, gpt_vocab
printf("%s: loading model part %d/%d from '%s'\n", __func__, i+1, n_parts, fname_part.c_str());

fin = std::ifstream(fname_part, std::ios::binary);
fin.rdbuf()->pubsetbuf(f_buf.data(), f_buf.size());
fin.seekg(file_offset);

// load weights
Expand Down