Re: [RFC PATCH 00/10] x86: undwarf unwinder

[Peter Zijlstra]

On Thu, Jun 01, 2017 at 07:47:05AM -0500, Josh Poimboeuf wrote:

> > It doesn't appear to be possible to get anywhere near a frame-pointer
> > unwinder due to having to do this log(n) lookup for every single
> > frame.
> 
> Hm, is there something faster, yet not substantially bigger?  Hash?
> Trie?

Not sure how to make a Hash work with nearest neighbour searches. And a
trie will only give you a constant speedup over the binary search but
not an improvement in complexity IIRC.