diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index cab546a0ae..e8f5a2f72b 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -332,12 +332,42 @@
The Build History (buildhistory) class records a
history of build output metadata, which can be used to detect possible
regressions as well as used for analysis of the build output.
- For more information on usinig Build History, see the
+ For more information on using Build History, see the
"Maintaining Build Output Quality"
section.
+
+ buildstats.bbclass
+
+
+ The Build Stats (buildstats) class records
+ performance statistics about each task executed during the build
+ (e.g. elapsed time, CPU usage, and I/O usage).
+
+
+
+ When you use this class, the output goes into the
+ BUILDSTATS_BASE
+ directory, which defaults to ${TMPDIR}/buildstats/.
+ You can analyze the elapsed time using
+ scripts/pybootchartgui/pybootchartgui.py, which
+ produces a cascading chart of the entire build process and can be
+ useful for highlighting bottlenecks.
+
+
+
+ To enable this class, use the
+ USER_CLASSES
+ variable from your local.conf file.
+ The meta-yocto/conf/local.conf.sample file
+ in the
+ Source Directory
+ enables this class by default.
+
+
+
Debian Renaming - debian.bbclass