[almostgotcaught]

> A lot of hot code are written in hand-coded inline assembly

I know... I write GPU assembly for a living... And still I make that wager. It's not a lot. It's not even a little. It's an epsilon (overall). And it gets smaller over time.

[Kamq]

What do you think the percentage of computation is with respect to hand-written vs compiler generated?

If small hot loops tend to be disproportionately hand written, and certain programs spend the majority of time in their hot loops, that could still be a decent percentage of time/instructions executed.