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0db9e010fa
By ensuring that tests take longer than a couple of seconds we eliminate systematic errors in our measurements. However, we also effectively eliminate the synchronisation overhead. To compensate, we attempt to estimate the overhead by reporting the difference between a single instance and the minimum averaged instance.
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#define WIDTH 1350
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#define HEIGHT 900
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#include "cairo-perf.h"
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static cairo_perf_ticks_t
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do_twin (cairo_t *cr,
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int width,
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int height,
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int loops)
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{
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int i, j, h;
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unsigned char s[2] = {0, 0};
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cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
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cairo_paint (cr);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_select_font_face (cr,
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"@cairo:",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_perf_timer_start ();
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while (loops--) {
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h = 2;
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for (i = 8; i < 48; i >= 24 ? i+=3 : i++) {
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cairo_set_font_size (cr, i);
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for (j = 33; j < 128; j++) {
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if (j == 33 || (j == 80 && i > 24)) {
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h += i + 2;
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cairo_move_to (cr, 10, h);
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}
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s[0] = j;
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cairo_text_path (cr, (const char *) s);
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}
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}
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cairo_fill (cr);
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}
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cairo_perf_timer_stop ();
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return cairo_perf_timer_elapsed ();
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}
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void
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twin (cairo_perf_t *perf,
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cairo_t *cr,
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int width,
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int height)
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{
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if (! cairo_perf_can_run (perf, "twin"))
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return;
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cairo_perf_run (perf, "twin", do_twin);
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}
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