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micro-optimizations

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joaquintides
2023-10-01 09:57:36 +02:00
parent 35541248d4
commit 29791bbf10
1 changed files with 7 additions and 7 deletions
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14
include/boost/unordered/detail/foa/concurrent_table.hpp
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@ -1333,24 +1333,24 @@ private:
int masks[2*bulk_visit_size-1]; int masks[2*bulk_visit_size-1];
auto it=first; auto it=first;
for(std::size_t i=0;i<m;++i,++it){ for(auto i=m;i--;++it){
hashes[i]=this->hash_for(*it); auto hash=hashes[i]=this->hash_for(*it);
auto pos=positions[i]=this->position_for(hashes[i]); auto pos=positions[i]=this->position_for(hash);
BOOST_UNORDERED_PREFETCH(this->arrays.groups()+pos); BOOST_UNORDERED_PREFETCH(this->arrays.groups()+pos);
} }
for(std::size_t i=0;i<m;++i){ for(auto i=m;i--;){
auto hash=hashes[i]; auto hash=hashes[i];
auto pos=positions[i]; auto pos=positions[i];
masks[i]=(this->arrays.groups()+pos)->match(hash); auto mask=masks[i]=(this->arrays.groups()+pos)->match(hash);
if(masks[i]){ if(mask){
BOOST_UNORDERED_PREFETCH(this->arrays.group_accesses()+pos); BOOST_UNORDERED_PREFETCH(this->arrays.group_accesses()+pos);
BOOST_UNORDERED_PREFETCH_ELEMENTS(this->arrays.elements()+pos*N,N); BOOST_UNORDERED_PREFETCH_ELEMENTS(this->arrays.elements()+pos*N,N);
} }
} }
it=first; it=first;
for(std::size_t i=0;i<m;++i,++it){ for(auto i=m;i--;++it){
auto pos=positions[i]; auto pos=positions[i];
prober pb(pos); prober pb(pos);
auto pg=this->arrays.groups()+pos; auto pg=this->arrays.groups()+pos;