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fix: greatly improve Variants scavenge heuristic

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This commit is contained in:
outfoxxed 2024-02-01 04:11:14 -08:00
parent e1281b8e7b
commit f2f7ec92f2
Signed by untrusted user: outfoxxed
GPG key ID: 4C88A185FB89301E
1 changed files with 29 additions and 2 deletions
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31
src/cpp/variants.cpp
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@ -16,9 +16,36 @@ void Variants::earlyInit(QObject* old) {
}
QObject* Variants::scavengeTargetFor(QObject* /* child */) {
// Attempt to find the set that most closely matches the current one.
// This is biased to the order of the scavenge list which should help in
// case of conflicts as long as variants have not been reordered.
if (this->activeScavengeVariant != nullptr) {
auto* r = this->scavengeableInstances.get(*this->activeScavengeVariant);
if (r != nullptr) return *r;
auto& values = this->scavengeableInstances.values;
if (values.empty()) return nullptr;
int matchcount = 0;
int matchi = 0;
int i = 0;
for (auto& [valueSet, _]: values) {
int count = 0;
for (auto& [k, v]: this->activeScavengeVariant->toStdMap()) {
if (valueSet.contains(k) && valueSet.value(k) == v) {
count++;
}
}
if (count > matchcount) {
matchcount = count;
matchi = i;
}
i++;
}
if (matchcount > 0) {
return values.takeAt(matchi).second;
}
}
return nullptr;