This stack appears to be leaking a font name on every call:

COREFOUNDATION.DLL!CFAllocatorAllocate Line 609	Objective-C++
COREFOUNDATION.DLL!_CFRuntimeCreateInstance Line 404	Objective-C++
COREFOUNDATION.DLL!__CFStringCreateImmutableFunnel3 Line 1521	Objective-C++
COREFOUNDATION.DLL!CFStringCreateWithCharactersNoCopy Line 1612	Objective-C++
COREGRAPHICS.DLL!_CFStringFromLocalizedString Line 146	Objective-C++
COREGRAPHICS.DLL!_DWriteFontCopyInformationalString Line 325	Objective-C++
CORETEXT.DLL!_DWriteFontCopyName Line 344	Objective-C++
CORETEXT.DLL!__DWriteTextFormatCreate() Line 205	Objective-C++
CORETEXT.DLL!__DWriteTextLayoutCreate Line 237	Objective-C++
CORETEXT.DLL!_DWriteGetFrameSize Line 537	Objective-C++
CORETEXT.DLL!CTFramesetterSuggestFrameSizeWithConstraints Line 131	Objective-C++
UIKIT.DLL!-[NSString(UIKitAdditions) _sizeWithAttributes:constrainedToSize:] Line 266	Objective-C++

Identifier Count Size (Bytes) Count Diff. Size Diff (Bytes) Module

• -[UIButton intrinsicContentSize] 12 168 +2 +28 UIKIT.DLL
  • -[NSString(UIKitAdditions) sizeWithFont:] 12 168 +2 +28 UIKIT.DLL
    • -[NSString(UIKitAdditions) sizeWithFont:constrainedToSize:] 12 168 +2 +28 UIKIT.DLL
      • -[NSString(UIKitAdditions) _sizeWithAttributes:constrainedToSize:] 12 168 +2 +28 UIKIT.DLL
        • CTFramesetterSuggestFrameSizeWithConstraints 12 168 +2 +28 CORETEXT.DLL
          • _DWriteGetFrameSize 12 168 +2 +28 CORETEXT.DLL
            • __DWriteTextLayoutCreate 12 168 +2 +28 CORETEXT.DLL
              • __DWriteTextLayoutApplyFont 12 168 +2 +28 CORETEXT.DLL
                • _DWriteFontCopyName 12 168 +2 +28 CORETEXT.DLL
                  • _DWriteFontCopyInformationalString 12 168 +2 +28 COREGRAPHICS.DLL
                  • _CFStringFromLocalizedString 12 168 +2 +28 COREGRAPHICS.DLL
                    [External Code] 6 72 +1 +12 [External Code]
                  • CFStringCreateWithCharactersNoCopy 6 96 +1 +16 COREFOUNDATION.DLL
                  • __CFStringCreateImmutableFunnel3 6 96 +1 +16 COREFOUNDATION.DLL
                  • _CFRuntimeCreateInstance 6 96 +1 +16 COREFOUNDATION.DLL
                  • CFAllocatorAllocate 6 96 +1 +16 COREFOUNDATION.DLL
                  • __CFAllocatorSystemAllocate 6 96 +1 +16 COREFOUNDATION.DLL