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livetrax/libs/canvas/benchmark/items_at_point.cc

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#include <sys/time.h>
#include "canvas/group.h"
#include "canvas/canvas.h"
#include "canvas/root_group.h"
#include "canvas/rectangle.h"
#include "benchmark.h"
using namespace std;
using namespace ArdourCanvas;
static void
test (int items_per_cell)
{
Group::default_items_per_cell = items_per_cell;
int const n_rectangles = 10000;
int const n_tests = 1000;
double const rough_size = 1000;
srand (1);
ImageCanvas canvas;
list<Item*> rectangles;
for (int i = 0; i < n_rectangles; ++i) {
rectangles.push_back (new Rectangle (canvas.root(), rect_random (rough_size)));
}
for (int i = 0; i < n_tests; ++i) {
Duple test (double_random() * rough_size, double_random() * rough_size);
/* ask the group what's at this point */
vector<Item const *> items;
canvas.root()->add_items_at_point (test, items);
}
}
int main ()
{
int tests[] = { 1, 2, 4, 8, 16, 32, 64, 128, 256 };
for (unsigned int i = 0; i < sizeof (tests) / sizeof (int); ++i) {
timeval start;
timeval stop;
gettimeofday (&start, 0);
test (tests[i]);
gettimeofday (&stop, 0);
int sec = stop.tv_sec - start.tv_sec;
int usec = stop.tv_usec - start.tv_usec;
if (usec < 0) {
--sec;
usec += 1e6;
}
double seconds = sec + ((double) usec / 1e6);
cout << "Test " << tests[i] << ": " << seconds << "\n";
}
}