137 lines
3.1 KiB
C++
137 lines
3.1 KiB
C++
/* ----------------------------------------------------------------------------
|
|
|
|
* GTSAM Copyright 2010, Georgia Tech Research Corporation,
|
|
* Atlanta, Georgia 30332-0415
|
|
* All Rights Reserved
|
|
* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
|
|
|
|
* See LICENSE for the license information
|
|
|
|
* -------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* @file timeVirtual.cpp
|
|
* @brief Time the overhead of using virtual destructors and methods
|
|
* @author Richard Roberts
|
|
* @date Nov 6, 2011
|
|
*/
|
|
|
|
#include <gtsam/base/timing.h>
|
|
|
|
#include <iostream>
|
|
|
|
using namespace std;
|
|
using namespace gtsam;
|
|
|
|
struct DtorTestBase {
|
|
DtorTestBase() { cout << " DtorTestBase" << endl; }
|
|
virtual ~DtorTestBase() { cout << " ~DtorTestBase" << endl; }
|
|
};
|
|
|
|
struct DtorTestDerived : public DtorTestBase {
|
|
DtorTestDerived() { cout << " DtorTestDerived" << endl; }
|
|
~DtorTestDerived() override { cout << " ~DtorTestDerived" << endl; }
|
|
};
|
|
|
|
|
|
struct VirtualBase {
|
|
VirtualBase() { }
|
|
virtual void method() = 0;
|
|
virtual ~VirtualBase() { }
|
|
};
|
|
|
|
struct VirtualDerived : public VirtualBase {
|
|
double data;
|
|
VirtualDerived() { data = rand(); }
|
|
void method() override { data = rand(); }
|
|
~VirtualDerived() override { }
|
|
};
|
|
|
|
struct NonVirtualBase {
|
|
NonVirtualBase() { }
|
|
~NonVirtualBase() { }
|
|
};
|
|
|
|
struct NonVirtualDerived : public NonVirtualBase {
|
|
double data;
|
|
NonVirtualDerived() { data = rand(); }
|
|
void method() { data = rand(); }
|
|
~NonVirtualDerived() { }
|
|
};
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
// Virtual destructor test
|
|
cout << "Stack objects:" << endl;
|
|
cout << "Base:" << endl;
|
|
{ DtorTestBase b; }
|
|
cout << "Derived:" << endl;
|
|
{ DtorTestDerived d; }
|
|
|
|
cout << "Heap objects:" << endl;
|
|
cout << "Base:" << endl;
|
|
{ DtorTestBase *b = new DtorTestBase(); delete b; }
|
|
cout << "Derived:" << endl;
|
|
{ DtorTestDerived *d = new DtorTestDerived(); delete d; }
|
|
cout << "Derived with base pointer:" << endl;
|
|
{ DtorTestBase *b = new DtorTestDerived(); delete b; }
|
|
|
|
int n = 10000000;
|
|
|
|
{
|
|
VirtualBase** b = new VirtualBase*[n];
|
|
gttic_(Virtual);
|
|
gttic_(new);
|
|
for(int i=0; i<n; ++i)
|
|
b[i] = new VirtualDerived();
|
|
gttoc_(new);
|
|
gttic_(method);
|
|
for(int i=0; i<n; ++i)
|
|
b[i]->method();
|
|
gttoc_(method);
|
|
gttic_(dynamic_cast);
|
|
for(int i=0; i<n; ++i) {
|
|
VirtualDerived* d = dynamic_cast<VirtualDerived*>(b[i]);
|
|
if(d)
|
|
d->method();
|
|
}
|
|
gttoc_(dynamic_cast);
|
|
gttic_(delete);
|
|
for(int i=0; i<n; ++i)
|
|
delete b[i];
|
|
gttoc_(delete);
|
|
gttoc_(Virtual);
|
|
delete[] b;
|
|
}
|
|
|
|
|
|
{
|
|
NonVirtualDerived** d = new NonVirtualDerived*[n];
|
|
gttic_(NonVirtual);
|
|
gttic_(new);
|
|
for(int i=0; i<n; ++i)
|
|
d[i] = new NonVirtualDerived();
|
|
gttoc_(new);
|
|
gttic_(method);
|
|
for(int i=0; i<n; ++i)
|
|
d[i]->method();
|
|
gttoc_(method);
|
|
gttic_(dynamic_cast_does_nothing);
|
|
for(int i=0; i<n; ++i)
|
|
d[i]->method();
|
|
gttoc_(dynamic_cast_does_nothing);
|
|
gttic_(delete);
|
|
for(int i=0; i<n; ++i)
|
|
delete d[i];
|
|
gttoc_(delete);
|
|
gttoc_(NonVirtual);
|
|
delete[] d;
|
|
}
|
|
|
|
tictoc_finishedIteration_();
|
|
tictoc_print_();
|
|
|
|
return 0;
|
|
}
|