From 0ca20e3e6c0d7cd059c02772315874ef8ae29029 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Thu, 18 Jul 2019 09:33:49 +0200
Subject: [PATCH] render: time how long time it takes to render a frame

---
 render.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/render.c b/render.c
index aebd81b5..718675e3 100644
--- a/render.c
+++ b/render.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/time.h>
 
 #include <wayland-cursor.h>
 #include <xdg-shell.h>
@@ -263,6 +264,9 @@ static const struct wl_callback_listener frame_listener = {
 void
 grid_render(struct terminal *term)
 {
+    struct timeval start_time;
+    gettimeofday(&start_time, NULL);
+
     static int last_cursor;
 
     assert(term->width > 0);
@@ -411,6 +415,14 @@ grid_render(struct terminal *term)
     wl_callback_add_listener(term->frame_callback, &frame_listener, term);
 
     wl_surface_commit(term->wl.surface);
+
+    struct timeval end_time;
+    gettimeofday(&end_time, NULL);
+
+    struct timeval render_time;
+    timersub(&end_time, &start_time, &render_time);
+    LOG_INFO("frame rendered in %lds %ldms",
+             render_time.tv_sec, render_time.tv_usec / 1000);
 }
 
 static void