Is there another way to remove entities from selection set when user box select?

[xiaozhihui1992]

void CMyAcEdSSGetFilter::ssgetAddFilter(int ssgetFlags, AcEdSelectionSetService& service, 
	const AcDbObjectIdArray& selectionSet, const AcDbObjectIdArray& subSelectionSet)
{
	auto stampBeg = std::chrono::steady_clock::now();
	AcGeIntArray arr;
	//arr.setLogicalLength(subSelectionSet.length());
	for (auto i = 0; i < subSelectionSet.length(); i++)
	{
		service.remove(i);
	}
	//service.remove(arr);
	auto stampEnd = std::chrono::steady_clock::now();
	double time_second = std::chrono::duration<double>(stampEnd - stampBeg).count();
}

up code sample is worked. But from test case ：remove all 260000 entities in Autocad2018 costs 15 second. It's NOT 

acceptable.

Is there another way to remove entities by filters? like filter by AcRxClass? 

[daniel_cadext]

have you tried acedSSDel? have a look at ArxDbgSelSet in ARXDBG

[xiaozhihui1992]

May be, I raise a conflict with this problem. 

I am NOT use acedSSGet api or raise a command to lead user pick , but the 

command in "Quiescent State" . There NO command running, then user pick.

I want to remove the entities before the entities put into the pick first selection set.

[tbrammer]

In your code

for (auto i = 0; i < subSelectionSet.length(); i++)
	service.remove(i);

you are calling AcEdSelectionSetService::remove(int index).

But there is also the method AcEdSelectionSetService::remove(const AcArray<int>& indices), which might be more performant. Try this:

AcArray<int> indices;
int count = subSelectionSet.length();
indices.setLogicalLength(count);
for (int i = 0; i < count; i++)
	indices[i] = i;
service.remove(indices);

[xiaozhihui1992]

Yes.

Test results:

remove (const AcArray& indices) 

[

    Total entities: 264792

     remove costs: 15.5 sec

]

remove (int index)

[

   Total entities: 264792

    remove costs: 15.8 sec

]

Machine：

windows 10 profession 10.0.19045

cpu: Intel core i7-10700

memory:  16GB 2400MHZ