[Freeciv-Dev] comparison of client speeds

[Jason Dorje Short <jdorje@xxxxxxxxxxxx>]

I applied the attached patch.  I set the sliding time to 500 ms and 
tried it out.  I ran it with iso-view with default resolution (except 
ftwl, which had to use non-iso view).  I used different clients.  I get 
something like this:
  gui-gtk-2.0: 12 FPS
  gui-gtk: 24 FPS
  gui-xaw: 28 FPS
  gui-ftwl/sdl: 6 FPS
  gui-ftwl/x11: 4 FPS

gui-gtk-2.0 is probably slower because of its implementation of 
flush_dirty.  We use gtk's implementation of diry areas and pass control 
back to gtk to do the flushing.  Aside from the added overhead this also 
gives gtk the opportunity to process any other pending events (good for 
responsiveness, bad for FPS).
With fullscreen instead of default resolution, these speeds are cut in half.

Using the store-pos patch (PR#9105) increases the speed by 25-50%.

jason

? fctest
? freeciv-2.0.0-beta1.tar.gz
Index: client/mapview_common.c
===================================================================
RCS file: /home/freeciv/CVS/freeciv/client/mapview_common.c,v
retrieving revision 1.151.2.3
diff -u -r1.151.2.3 mapview_common.c
--- client/mapview_common.c     9 Oct 2004 16:00:37 -0000       1.151.2.3
+++ client/mapview_common.c     11 Oct 2004 22:16:39 -0000
@@ -503,6 +503,7 @@
     int diff_x, diff_y;
     double timing_sec = (double)smooth_center_slide_msec / 1000.0, mytime;
     static struct timer *anim_timer;
+    int frames = 0;
 
     gui_distance_vector(&diff_x, &diff_y, start_x, start_y, gui_x0, gui_y0);
     anim_timer = renew_timer_start(anim_timer, TIMER_USER, TIMER_ACTIVE);
@@ -514,7 +515,12 @@
                              start_y + diff_y * (mytime / timing_sec));
       flush_dirty();
       gui_flush();
+      frames++;
     } while (mytime < timing_sec);
+
+    mytime = read_timer_seconds(anim_timer);
+    freelog(LOG_NORMAL, "Got %d frames in %f seconds; %f FPS.",
+           frames, mytime, (float)frames / mytime);
   } else {
     base_set_mapview_origin(gui_x0, gui_y0);
   }