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IfcFile::entitiesByReference: cache loaded references. Profiling shows around 3x speed-up (avg. of first 5000 calls to this function).

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This commit is contained in:
Stinkfist0
2018-10-01 15:11:34 +03:00
committed by Thomas Krijnen
parent 910cdb3754
commit 9211f80625
2 changed files with 15 additions and 6 deletions
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src/ifcparse/IfcParse.cpp
+13 -6
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@@ -1795,12 +1795,19 @@ IfcEntityList::ptr IfcFile::entitiesByReference(int t) {
entities_by_ref_t::const_iterator it = byref.find(t);
IfcEntityList::ptr ret;
if (it != byref.end()) {
ret.reset(new IfcEntityList);
ret->reserve((unsigned)it->second.size());
const std::vector<unsigned>& ids = it->second;
for (std::vector<unsigned>::const_iterator jt = ids.begin(); jt != ids.end(); ++jt) {
ret->push(entityById(*jt));
}
ref_map_t::const_iterator cached_it = by_ref_cached_.find(t);
if (cached_it != by_ref_cached_.end()) {
ret = cached_it->second;
}
else {
ret.reset(new IfcEntityList);
ret->reserve((unsigned)it->second.size());
const std::vector<unsigned>& ids = it->second;
for (std::vector<unsigned>::const_iterator jt = ids.begin(); jt != ids.end(); ++jt) {
ret->push(entityById(*jt));
}
by_ref_cached_[t] = ret;
}
}
return ret;
}