diff --git a/QGIS3---QGIS-Server-code-sprint-Notes.md b/QGIS3---QGIS-Server-code-sprint-Notes.md
index 362d5ef..610e60d 100644
--- a/QGIS3---QGIS-Server-code-sprint-Notes.md
+++ b/QGIS3---QGIS-Server-code-sprint-Notes.md
@@ -59,3 +59,10 @@ See https://github.com/dmarteau/QGIS
 
  Discussion,"do we need a project cache? "
  why not just export a binary blob when saving qgs project? No more xml parsing then.
+
+## Tracking of what is done during Code sprint
+
+1. https://github.com/qgis/QGIS/pull/3809 - replace QgsMapRenderer has been merged. During this work Paul noticed that multithread rendering on server side worked, but that all tests failed. One hypothesis is that tests are not compatible with multithread rendering. If that's verified, we could expect huge performance improvements on rendering! A good candidate for day-2 work. 
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