Re: Make MemoryContextMemAllocated() more precise

On Tue, 7 Apr 2020 at 14:26, Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
>
> On Mon, 2020-04-06 at 23:39 +1200, David Rowley wrote:
> > 4. Do you think it would be better to have two separate functions for
> > MemoryContextCount(), a recursive version and a non-recursive
> > version.
>
> I could, but right now the only caller passes recurse=true, so I'm not
> really eliminating any code in that path by specializing the functions.
> Are you thinking about performance or you just think it would be better
> to have two entry points?

I was thinking in terms of both performance by eliminating a branch,
but mostly it was down to ease of code reading.

I thought it was easier to read:
MemoryContextGetCountersRecruse(&counters); then
MemoryContextGetCounters(&counters, true); since I might need to go
see what "true" is for.

The non-recursive version, if we decide we need one, would likely just
be 1 one-line body function calling the implementation's getcounter
method.

David