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cmLocalGenerator: change ImportedGeneratorTargets from vector to map

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For large number of targets significant amount of time is spent in
cmLocalGenerator::FindGeneratorTargetToUse, which uses find_if on a
vector to locate the given target. Using a map instead of vector for
ImportedGeneratorTargets (as done for cmMakefile::ImportedTargets)
provides a significant speedup (up to factor of 2).
This commit is contained in:
Frank Winklmeier
2018-01-29 16:11:07 +01:00
committed by Brad King
parent 4443adc1c0
commit aed227fd5a
2 changed files with 6 additions and 24 deletions
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28
Source/cmLocalGenerator.cxx
View File

@@ -553,14 +553,13 @@ void cmLocalGenerator::GenerateInstallRules()
void cmLocalGenerator::AddGeneratorTarget(cmGeneratorTarget* gt)
{
this->GeneratorTargets.push_back(gt);
this->GeneratorTargetSearchIndex.insert(
std::pair<std::string, cmGeneratorTarget*>(gt->GetName(), gt));
this->GeneratorTargetSearchIndex.emplace(gt->GetName(), gt);
this->GlobalGenerator->IndexGeneratorTarget(gt);
}
void cmLocalGenerator::AddImportedGeneratorTarget(cmGeneratorTarget* gt)
{
this->ImportedGeneratorTargets.push_back(gt);
this->ImportedGeneratorTargets.emplace(gt->GetName(), gt);
this->GlobalGenerator->IndexGeneratorTarget(gt);
}
@@ -569,22 +568,6 @@ void cmLocalGenerator::AddOwnedImportedGeneratorTarget(cmGeneratorTarget* gt)
this->OwnedImportedGeneratorTargets.push_back(gt);
}
struct NamedGeneratorTargetFinder
{
NamedGeneratorTargetFinder(std::string const& name)
: Name(name)
{
}
bool operator()(cmGeneratorTarget* tgt)
{
return tgt->GetName() == this->Name;
}
private:
std::string Name;
};
cmGeneratorTarget* cmLocalGenerator::FindLocalNonAliasGeneratorTarget(
const std::string& name) const
{
@@ -1395,11 +1378,10 @@ void cmLocalGenerator::AddLanguageFlagsForLinking(
cmGeneratorTarget* cmLocalGenerator::FindGeneratorTargetToUse(
const std::string& name) const
{
std::vector<cmGeneratorTarget*>::const_iterator imported = std::find_if(
this->ImportedGeneratorTargets.begin(),
this->ImportedGeneratorTargets.end(), NamedGeneratorTargetFinder(name));
GeneratorTargetMap::const_iterator imported =
this->ImportedGeneratorTargets.find(name);
if (imported != this->ImportedGeneratorTargets.end()) {
return *imported;
return imported->second;
}
if (cmGeneratorTarget* t = this->FindLocalNonAliasGeneratorTarget(name)) {

2
Source/cmLocalGenerator.h
View File

@@ -389,7 +389,7 @@ protected:
std::vector<cmGeneratorTarget*> GeneratorTargets;
std::set<cmGeneratorTarget const*> WarnCMP0063;
std::vector<cmGeneratorTarget*> ImportedGeneratorTargets;
GeneratorTargetMap ImportedGeneratorTargets;
std::vector<cmGeneratorTarget*> OwnedImportedGeneratorTargets;
std::map<std::string, std::string> AliasTargets;