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add std::string and std::valarray to array allocation benchmark

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This commit is contained in:
Dane Springmeyer 2014-01-29 13:03:35 -08:00
parent fb0dca7b54
commit 79a82cd8ff
1 changed files with 84 additions and 0 deletions
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84
benchmark/test_array_allocation.cpp
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@ -3,6 +3,7 @@
#include <cstdlib>
#include <stdexcept>
#include <array>
#include <valarray>
// http://stackoverflow.com/questions/17347254/why-is-allocation-and-deallocation-of-stdvector-slower-than-dynamic-array-on-m
@ -189,6 +190,77 @@ public:
}
};
class test5 : public benchmark::test_case
{
public:
uint32_t size_;
std::vector<uint8_t> array_;
test5(mapnik::parameters const& params)
: test_case(params),
size_(*params.get<mapnik::value_integer>("size",256*256)),
array_(size_,0) { }
bool validate() const
{
return true;
}
void operator()() const
{
for (std::size_t i=0;i<iterations_;++i) {
std::string data(array_.begin(),array_.end());
ensure_zero((uint8_t *)&data[0],size_);
}
}
};
class test5b : public benchmark::test_case
{
public:
uint32_t size_;
std::vector<char> array_;
test5b(mapnik::parameters const& params)
: test_case(params),
size_(*params.get<mapnik::value_integer>("size",256*256)),
array_(size_,0) { }
bool validate() const
{
return true;
}
void operator()() const
{
for (std::size_t i=0;i<iterations_;++i) {
std::string data(&array_[0]);
ensure_zero((uint8_t *)&data[0],size_);
}
}
};
// C++14 dynarray<T>
// http://isocpp.org/blog/2013/04/trip-report-iso-c-spring-2013-meeting
// http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130909/088700.html
// http://stackoverflow.com/questions/17303902/any-alternative-to-stddynarray-presently-available
class test6 : public benchmark::test_case
{
public:
uint32_t size_;
std::vector<uint8_t> array_;
test6(mapnik::parameters const& params)
: test_case(params),
size_(*params.get<mapnik::value_integer>("size",256*256)),
array_(size_,0) { }
bool validate() const
{
return true;
}
void operator()() const
{
for (std::size_t i=0;i<iterations_;++i) {
std::valarray<uint8_t> data(size_,0);
ensure_zero(&data[0],size_);
}
}
};
int main(int argc, char** argv)
{
mapnik::parameters params;
@ -222,5 +294,17 @@ int main(int argc, char** argv)
test3c test_runner(params);
run(test_runner,"vector/assign");
}
{
test5 test_runner(params);
run(test_runner,"std::string range");
}
{
test5 test_runner(params);
run(test_runner,"std::string &[0]");
}
{
test5 test_runner(params);
run(test_runner,"valarray");
}
return 0;
}