I am not sure why bug 1916008 causes the size to enlarge, and it's only on OSX, but those fixes are necessary for compatibility (accommodating API misusages). Additionally, 0.2x% larger seems acceptable to me.
Bug 1919081 Comment 2 Edit History
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I am not sure why bug 1916008 causes the size to enlarge, and it's only on OSX (patches are applied to all platforms), but those fixes are necessary for compatibility (accommodating API misusages). Additionally, 0.2x% larger seems acceptable to me.