Add news

ivonastojanovic · ivonastojanovic · commit 2d977007408d · 2026-03-10T20:02:20.000Z
diff --git a/Misc/NEWS.d/next/Library/2026-03-10-19-50-59.gh-issue-138122.CsoBEo.rst b/Misc/NEWS.d/next/Library/2026-03-10-19-50-59.gh-issue-138122.CsoBEo.rst
@@ -0,0 +1,4 @@
+The ``profiling.sampling`` module now supports differential flamegraph
+visualization via ``--diff-flamegraph`` to compare two profiling runs.
+Functions are colored red (regressions), blue (improvements), gray (neutral),
+or purple (new). Elided stacks show code paths that disappeared between runs.
