On Wed, 2006-02-15 at 18:28 -0500, Tom Lane wrote:
> It seems clear that our qsort.c is doing a pretty awful job of picking
> qsort pivots, while glibc is mostly managing not to make that mistake.
> I haven't looked at the glibc code yet to see what they are doing
> differently.
glibc qsort is actually merge sort, so I'm not surprised it avoids this
problem.
-Neil