[halayli]

Guessing, locality of reference might play a role.

[fleitz]

That, the branch predictors, and caching behaviors, n-way, alignment, etc.

It probably explains why different runs vary so widely, I always thought it was other things going on in the OS, never really thought about the caches, etc.

[halayli]

> That, the branch predictors, and caching behaviors, n-way, alignment, etc.

Those all fall under locality of reference, btw. But yeah cache and branch prediction play a huge role in the list.

One thing that stung me in the past was OS scheduling.