-/* We can't just use TIMED_DEFER for glBegin/glEnd since the
- * glBeginQuery/glEndQuery calls must both be outside
- * glBegin/glEnd. */
+/* We can't just use TIMED_DEFER for glBegin/glEnd since the metrics
+ * counter must be started before glBegin and stopped after glEnd,
+ * (that is, everything from glBegin to glEnd is counted as a single
+ * operation). */