Hi,
On 2019-12-27 08:20:17 +0900, Michael Paquier wrote:
> On Thu, Dec 26, 2019 at 10:26:51AM -0800, Peter Geoghegan wrote:
> > On Thu, Dec 26, 2019 at 10:15 AM Andres Freund wrote:
> >> Yea, this seems like a much bigger move than warranted. Especially
> >> without a backward compat header put i
Andres Freund writes:
> On 2019-12-27 08:20:17 +0900, Michael Paquier wrote:
>> Hm, I am not sure that it is actually that much used, such stuff is
>> very specialized.
> That's true for some of this, but e.g. genam.h is pretty widely
> included. I mean, you had to adapt like 100+ files and while
Micro-optimize AllocSetFreeIndex() by reference to pg_bitutils code.
Use __builtin_clz() where available. Where it isn't, we can still win
a little by using the pg_leftmost_one_pos[] lookup table instead of
having a private table.
Also drop the initial right shift by ALLOC_MINBITS in favor of
su
