I feel like disabling all the error checking is a significant change for comparing performance, because the phrasing implies removal of bounds checks, etc that

I feel like disabling all the error checking is a significant change for comparing performance, because the phrasing implies removal of bounds checks, etc that can be significant. That aside a 2x performance improvement speaks to something algorithmic rather than the canonical "sufficiently intelligent compiler" - does anyone have the before/after source for this "study" (Obviously it does matter that algorithmic improvements may be easier in a higher level language, but that is likely truer for any high level language vs assembly)