> By the way CPython's list type does more than log(N) resize ops:

Obviously it's an asymptotic complexity, not a hard number.

> I understand the proposal as a power user tool. Most people don't
> need a pneumatic hammer, an ordinary hammer suffices. But in some
> cases you need a tool with more power. "CPython doesn't gain much
> from the new API, let's not add it to Python" isn't nice to other
> implementations that may benefit from it.

I'd still like to see concrete use cases, not micro-benchmarks.