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diff --git a/ChangeLog b/ChangeLog
index c6623763..2ddc2b36 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@ What's new in version 1.0.3
 
 * Performance improvements
   (thanks to Jann Horn)
+* Further performance improvements due to conditional parsing
+  of IO data depending on selected fields.
 
 What's new in version 1.0.2