Completely agree with that 90% of the code I usually work with is not of the 'hot path'.
Whereas 90% of the time might be spent in 10% of the code image, no 10% chunk of the image can ever be found that contributes to 90% of its bloat.
1% of the image contributes 1% to the bloat, 10% to 10% and so on.
:)