[gtk+] rate-limit the glyph cache dumping

[Matthias Clasen <matthiasc src gnome org>]

commit 781821bae4b13612a4df8df80e8b506fcc7a34fc
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Sep 11 11:15:00 2017 -0400

    rate-limit the glyph cache dumping
    
    Writing the file out every frame really isn't necessary.
    Do it once per second.

 gsk/gskvulkanrenderer.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskvulkanrenderer.c b/gsk/gskvulkanrenderer.c
index 39313cd..109f487 100644
--- a/gsk/gskvulkanrenderer.c
+++ b/gsk/gskvulkanrenderer.c
@@ -642,10 +642,18 @@ dump_glyph_cache_stats (GlyphCache *cache)
 {
   GHashTableIter iter;
   FontEntry *fe;
+  static gint64 time;
+  gint64 now;
 
   if (!cache->fonts)
     return;
 
+  now = g_get_monotonic_time ();
+  if (now - time < 1000000)
+    return;
+
+  time = now;
+
   g_print ("Glyph cache:\n");
   g_hash_table_iter_init (&iter, cache->fonts);
   while (g_hash_table_iter_next (&iter, NULL, (gpointer *)&fe))