sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

array alloc bench: add static_vector + fix valarray usage

Browse source
This commit is contained in:
Dane Springmeyer 2014-04-28 19:58:15 -07:00
parent ad10497503
commit 69ec89789a
1 changed files with 34 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

38
benchmark/test_array_allocation.cpp
View file

@ -4,6 +4,7 @@
#include <stdexcept> #include <stdexcept>
#include <array> #include <array>
#include <valarray> #include <valarray>
#include <boost/container/static_vector.hpp>
// http://stackoverflow.com/questions/17347254/why-is-allocation-and-deallocation-of-stdvector-slower-than-dynamic-array-on-m // http://stackoverflow.com/questions/17347254/why-is-allocation-and-deallocation-of-stdvector-slower-than-dynamic-array-on-m
@ -228,7 +229,7 @@ public:
void operator()() const void operator()() const
{ {
for (std::size_t i=0;i<iterations_;++i) { for (std::size_t i=0;i<iterations_;++i) {
std::string data(&array_[0]); std::string data(&array_[0],array_.size());
ensure_zero((uint8_t *)&data[0],size_); ensure_zero((uint8_t *)&data[0],size_);
} }
} }
@ -255,7 +256,32 @@ public:
void operator()() const void operator()() const
{ {
for (std::size_t i=0;i<iterations_;++i) { for (std::size_t i=0;i<iterations_;++i) {
std::valarray<uint8_t> data(size_,0); std::valarray<uint8_t> data(static_cast<uint8_t>(0),static_cast<size_t>(size_));
ensure_zero(&data[0],size_);
}
}
};
// http://i42.co.uk/stuff/vecarray.htm
// http://www.boost.org/doc/libs/1_54_0/doc/html/boost/container/static_vector.html
class test7 : public benchmark::test_case
{
public:
uint32_t size_;
std::vector<uint8_t> array_;
test7(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) {
boost::container::static_vector<uint8_t,256*256> data(size_,0);
ensure_zero(&data[0],size_); ensure_zero(&data[0],size_);
} }
} }
@ -299,12 +325,16 @@ int main(int argc, char** argv)
run(test_runner,"std::string range"); run(test_runner,"std::string range");
} }
{ {
test5 test_runner(params); test5b test_runner(params);
run(test_runner,"std::string &[0]"); run(test_runner,"std::string &[0]");
} }
{ {
test5 test_runner(params); test6 test_runner(params);
run(test_runner,"valarray"); run(test_runner,"valarray");
} }
{
test7 test_runner(params);
run(test_runner,"static_vector");
}
return 0; return 0;
} }