diff --git a/llvm/include/llvm/ProfileData/SampleProf.h b/llvm/include/llvm/ProfileData/SampleProf.h
--- a/llvm/include/llvm/ProfileData/SampleProf.h
+++ b/llvm/include/llvm/ProfileData/SampleProf.h
@@ -447,7 +447,7 @@
                       arg.Callsite.Discriminator);
 }
 
-using SampleContextFrameVector = SmallVector<SampleContextFrame, 10>;
+using SampleContextFrameVector = SmallVector<SampleContextFrame, 1>;
 using SampleContextFrames = ArrayRef<SampleContextFrame>;
 
 struct SampleContextFrameHash {