Yeah, skimming your source it seems most of your loops involve calling some function, and even if that's inlined I believe the Go compiler will put a speculativ

Yeah, skimming your source it seems most of your loops involve calling some function, and even if that's inlined I believe the Go compiler will put a speculative yield call in there. I suppose my hypothetical would be an issue if you used a non-Go BLAS implementation, as calling out to C will hog the OS thread. But this is a known issue (e.x. https://www.cockroachlabs.com/blog/the-cost-and-complexity-of-cgo/ https://www.cockroachlabs.com/blog/the-cost-and-complexity-o...).