[gnome-desktop/wip/hadess/thumbnail-test-stats: 5/6] thumbnail: Print time elapsed when requested during test

[Bastien Nocera <hadess src gnome org>]

commit 06f0e9f8bf9f0474993000de323fefcef5cadd51
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Oct 14 12:18:07 2020 +0200

    thumbnail: Print time elapsed when requested during test

 libgnome-desktop/test-desktop-thumbnail.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
---
diff --git a/libgnome-desktop/test-desktop-thumbnail.c b/libgnome-desktop/test-desktop-thumbnail.c
index f3814de3..e50a3743 100644
--- a/libgnome-desktop/test-desktop-thumbnail.c
+++ b/libgnome-desktop/test-desktop-thumbnail.c
@@ -64,8 +64,10 @@ thumbnail_file (GnomeDesktopThumbnailFactory *factory,
 int main (int argc, char **argv)
 {
        g_autoptr(GnomeDesktopThumbnailFactory) factory = NULL;
+       g_autoptr(GTimer) timer = NULL;
        gint num_iterations = 1;
        gboolean shared_factory = FALSE;
+       gboolean show_timer = FALSE;
        char **filenames = NULL;
        int ret = 0;
        g_autoptr(GOptionContext) option_context = NULL;
@@ -73,10 +75,13 @@ int main (int argc, char **argv)
        const GOptionEntry options[] = {
                { "shared-factory", 's', 0, G_OPTION_ARG_NONE, &shared_factory, "Whether to share the 
Thumbnail Factory (default: off)", NULL },
                { "num-iterations", 'n', 0, G_OPTION_ARG_INT, &num_iterations, "Number of times to run 
thumbnail operation (default: 1)", NULL },
+               { "show-timer", 't', 0, G_OPTION_ARG_NONE, &show_timer, "Whether to show time statistics for 
operations", NULL },
                { G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, "[INPUT FILE] [OUTPUT 
FILE]", NULL },
                { NULL}
        };
        int i;
+       gdouble first_iter_elapsed = 0.0;
+       gdouble following_elapsed = 0.0;
 
        setlocale (LC_ALL, "");
        option_context = g_option_context_new ("");
@@ -97,16 +102,40 @@ int main (int argc, char **argv)
                return 1;
        }
 
+       timer = g_timer_new ();
+
        for (i = 0; i < num_iterations; i++) {
+               g_timer_start (timer);
+
                if (factory == NULL)
                        factory = gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
 
                if (!thumbnail_file (factory, filenames[0], filenames[1]))
                        return 1;
 
+               if (i == 0)
+                       first_iter_elapsed = g_timer_elapsed (timer, NULL);
+               else
+                       following_elapsed += g_timer_elapsed (timer, NULL);
+
                if (!shared_factory)
                        g_clear_object (&factory);
        }
 
+       if (show_timer) {
+               if (num_iterations == 1) {
+                       g_print ("Elapsed time: %d msec\n",
+                                (int) (first_iter_elapsed * 1000));
+               } else if (num_iterations > 1) {
+                       g_print ("First iteration: %d msec\n",
+                                (int) (first_iter_elapsed * 1000));
+                       g_print ("Average time: %d msec (%d iterations)\n",
+                                (int) (following_elapsed * 1000 / (num_iterations - 1)),
+                                num_iterations - 1);
+               } else {
+                       g_assert_not_reached ();
+               }
+       }
+
        return 0;
 }