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Don't sort; just pick best score

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This commit is contained in:
Max Bernstein 2023-02-24 11:17:01 -05:00
parent 15758d448d
commit c066167652
1 changed files with 7 additions and 4 deletions
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11
src/namedict.h
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@ -52,7 +52,8 @@ namespace pkpy{
uint32_t find_perfect_hash_seed(uint32_t capacity, const std::vector<StrName>& keys){
if(keys.empty()) return kHashSeeds[0];
std::set<uint32_t> indices;
std::vector<std::pair<uint32_t, float>> scores(kHashSeeds.size());
uint32_t best_seed = 0;
float best_score = std::numeric_limits<float>::max();
for(int i=0; i<kHashSeeds.size(); i++){
indices.clear();
for(auto key: keys){
@ -60,10 +61,12 @@ namespace pkpy{
indices.insert(index);
}
float score = indices.size() / (float)keys.size();
scores[i] = {kHashSeeds[i], score};
if (score > best_score) {
best_score = score;
best_seed = kHashSeeds[i];
}
}
std::sort(scores.begin(), scores.end(), [](auto a, auto b){ return a.second > b.second; });
return scores[0].first;
return best_seed;
}
struct NameDict {