Issue #16034: Fix performance regressions in the new BZ2File implementation.

Thanks to Victor Hooi for the bug report, and Serhiy Storchaka for the initial patch.
diff --git a/Misc/NEWS b/Misc/NEWS
index 245cf1a..7bfa649 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,9 @@
 Library
 -------
 
+- Issue #16034: Fix performance regressions in the new BZ2File implementation.
+  Initial patch by Serhiy Storchaka.
+
 - Issue #15756: subprocess.poll() now properly handles errno.ECHILD to
   return a returncode of 0 when the child has already exited or cannot
   be waited on.