Updated Binary Log (markdown)

Binary-Log.md

@@ -1,5 +1,13 @@
 # MSBuild binary log overview
 
+Starting with MSBuild 15.3 a new binary log format is introduced, to complement the existing file and console loggers.
+
+Goals:
+ * completeness (more information than the most detailed file log)
+ * build speed (doesn't slow the build down nearly as much as the diagnostic-level file log)
+ * smaller disk size (10-20x more compact than a file log)
+ * structure (preserves the exact build event args that can later be replayed to reconstruct the exact events and information as if a real build was running). File logs erase structure and are harder to parse (especially for multicore /m builds).
+
 # Creating a binary log during a build
 
 # Replaying a binary log