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std::queue facts is faster

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This commit is contained in:
David Allemang
2022-09-14 13:54:08 -04:00
parent 5dc9bb3dd6
commit d67aab4d43
1 changed files with 9 additions and 12 deletions
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21
tc/src/core.cpp
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@@ -1,6 +1,8 @@
#include <tc/core.hpp>
#include <algorithm>
#include <queue>
#include <vector>
namespace tc {
SubGroup Group::subgroup(const std::vector<int> &gens) const {
@@ -97,8 +99,8 @@ namespace tc {
rel_tables.add_row();
// queue of products that can be determined by the new coset
std::vector<int> facts;
facts.push_back(idx);
std::queue<int> facts;
facts.push(idx);
// todo unrolled linked list interval
// coset = idx / ngens;
@@ -106,16 +108,11 @@ namespace tc {
// rel_tables.del_rows_to(coset);
while (!facts.empty()) {
// todo heap
std::sort(facts.begin(), facts.end(), std::greater<>());
fact_idx = facts.back();
facts.pop_back();
fact_idx = facts.front();
facts.pop();
// skip if this product was already determined
// todo try to avoid these duplications
if (cosets.get(fact_idx) != -1) {
continue;
}
if (cosets.get(fact_idx) != -1)continue;
cosets.put(fact_idx, target);
@@ -149,10 +146,10 @@ namespace tc {
lst = *(trow.lst_ptr);
delete trow.lst_ptr;
gen_ = rel.gens[(int) (rel.gens[0] == gen)];
facts.push_back(lst * ngens + gen_);
facts.push(lst * ngens + gen_);
} else if (trow.gnr == -rel.mult) {
gen_ = rel.gens[rel.gens[0] == gen];
facts.push_back(target * ngens + gen_);
facts.push(target * ngens + gen_);
} else if (trow.gnr == rel.mult - 1) {
*(trow.lst_ptr) = target;
}