mapnik/benchmark/test_quad_tree.cpp

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#include "bench_framework.hpp"
#include <mapnik/quad_tree.hpp>
#include <random>
using quad_tree_type = mapnik::quad_tree<std::size_t>;
class test : public benchmark::test_case
{
public:
test(mapnik::parameters const& params)
: test_case(params) {}
bool validate() const
{
return true;
}
bool operator()() const
{
std::random_device rd;
std::default_random_engine engine(rd());
std::uniform_int_distribution<int> uniform_dist(0, 2048);
std::size_t count = 0;
quad_tree_type tree(mapnik::box2d<double>(0,0,2048,2048));
for (size_t i = 0; i < iterations_; ++i)
{
int cx = uniform_dist(engine);
int cy = uniform_dist(engine);
int sx = 0.2 * uniform_dist(engine);
int sy = 0.2 * uniform_dist(engine);
mapnik::box2d<double> box(cx - sx,cy - sy, cx + sx, cy + sy);
tree.insert(i, box);
count++;
}
return true;
}
};
BENCHMARK(test,"quad_tree creation")