Attachment 53653 Details for Bug 43064 – benchmark

benchmark

slow_cairo.c (text/plain), 1.26 KB, created by Oleg Bulatov on 2011-11-18 05:44:23 UTC

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Creator: Oleg Bulatov

Created: 2011-11-18 05:44:23 UTC

Size: 1.26 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <cairo.h>
>#include <time.h>
>
>#define N_INIT 100
>#define N_STEP 100
>#define N_MAX 1000
>#define REPEATS 100
>
>#define WIDTH 1000
>#define HEIGHT 400
>
>int main (int argc, char* argv[])
>{
>	double data[N_MAX];
>	int i, j, n;
>
>	for (i = 0; i < N_MAX; ++i)
>	{
>		data[i] = (double)rand() / RAND_MAX * HEIGHT;
>	}
>
>	printf("N_INIT=%d; N_STEP=%d; N_MAX=%d; REPEATS=%d\n", N_INIT, N_STEP, N_MAX, REPEATS);
>	for (n = N_INIT; n <= N_MAX; n += N_STEP)
>	{
>		struct timespec begin, end;
>		long long beginll, endll;
>		cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT);
>		cairo_t* cr = cairo_create(surface);
>
>		clock_gettime(CLOCK_MONOTONIC, &begin);
>
>		cairo_set_source_rgb(cr, 0.4, 0.8, 0.4);
>		for (j = 0; j < REPEATS; ++j)
>		{
>			cairo_new_path(cr);
>			cairo_move_to(cr, 0, data[0]);
>			for (i = 0; i < n; ++i)
>			{
>				cairo_line_to(cr, (double)i / n * WIDTH, data[i]);
>			}
>			cairo_stroke(cr);
>		}
>
>		clock_gettime(CLOCK_MONOTONIC, &end);
>
>		cairo_destroy(cr);
>		cairo_surface_destroy(surface);
>
>		beginll = (long long)begin.tv_sec * 1000000000 + begin.tv_nsec;
>		endll = (long long)end.tv_sec * 1000000000 + end.tv_nsec;
>		printf("%d dots: %.4lf ns\n", n, (double)(endll - beginll) / (n * REPEATS));
>	}
>
>	return 0;
>}

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Attachments on bug 43064: 53653 | 53684

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