fabs/rotate-me-fast
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Tweak stats display.

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Add average metric.
This commit is contained in:
Fabien Freling 2014-07-07 23:31:59 +02:00
parent 68fb1b1951
commit 54e35ff8d0
1 changed files with 28 additions and 12 deletions
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40
rotation.cpp
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@ -1,6 +1,7 @@
#include <string> #include <string>
#include <fstream> #include <fstream>
#include <iostream> #include <iostream>
#include <iomanip>
#include <sstream> #include <sstream>
#include <cmath> #include <cmath>
#include <cassert> #include <cassert>
@ -1024,30 +1025,45 @@ int main(int argc, char* argv[])
Image img(argv[1]); Image img(argv[1]);
TiledImage<8, 8> tiled_img(argv[1]); TiledImage<8, 8> tiled_img(argv[1]);
// No tile
float average = 0.0;
int i = 0;
for (double rotation = 0; rotation < 360; rotation += 45) for (double rotation = 0; rotation < 360; rotation += 45)
{ {
// No tile
auto const before = chrono::high_resolution_clock::now(); auto const before = chrono::high_resolution_clock::now();
Image* const rotated = rotate(img, rotation); Image* const rotated = rotate(img, rotation);
auto const after = chrono::high_resolution_clock::now(); auto const after = chrono::high_resolution_clock::now();
auto const duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(after - before); auto const duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(after - before);
average += duration_ms.count();
// Tile
auto const before_tiled = chrono::high_resolution_clock::now();
auto const rotated_tiled = rotate(tiled_img, rotation);
auto const after_tiled = chrono::high_resolution_clock::now();
auto const duration_ms_tiled = std::chrono::duration_cast<std::chrono::milliseconds>(after_tiled - before_tiled);
cout << "rotate(" << rotation << "): " << duration_ms.count() << " ms" << endl; cout << "rotate(" << rotation << "): " << duration_ms.count() << " ms" << endl;
cout << "tiled: " << duration_ms_tiled.count() << " ms" << endl;
cout << "speedup: " << (int) (((float) duration_ms.count() / duration_ms_tiled.count() - 1) * 100) << "%" << endl << endl;
rotated->save(get_save_path("rotated", rotation)); rotated->save(get_save_path("rotated", rotation));
rotated_tiled->save(get_save_path("rotated_tiled", rotation));
delete rotated; delete rotated;
delete rotated_tiled; ++i;
} }
cout << "---------" << endl;
cout << " average: " << average / i << "ms" << endl << endl;
// Tile
average = 0.0;
i = 0;
for (double rotation = 0; rotation < 360; rotation += 45)
{
auto const before = chrono::high_resolution_clock::now();
auto const rotated = rotate(tiled_img, rotation);
auto const after = chrono::high_resolution_clock::now();
auto const duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(after - before);
average += duration_ms.count();
cout << "rotate tiled(" << rotation << "): " << duration_ms.count() << " ms" << endl;
rotated->save(get_save_path("rotated_tiled", rotation));
delete rotated;
++i;
}
cout << "---------" << endl;
cout << " average: " << average / i << "ms" << endl;
return 0; return 0;
} }