Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc? - Mailing list pgsql-hackers

From Álvaro Herrera
Subject Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
Date
Msg-id 202510191732.kxjptludow3i@alvherre.pgsql
Whole thread Raw
In response to Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?  (Lukas Fittl <lukas@fittl.com>)
List pgsql-hackers
On 2025-Jul-27, Lukas Fittl wrote:

> See attached v11 (and moved to the PG19-2 commitfest), split into a new set
> of patches:

I rebased (but not reviewed) this patchset now that Michael committed
part of 0001, as seen in another thread.

Quickly looking at 0003, I wonder if adding a separate --fast switch to
pg_test_timing is really what we want.  Why not report both the fast and
legacy measurements in platforms that support both, instead?  If I were
a consultant trying to understand a customer's system, I would have to
ask them to run it twice just in case 'fast' is supported, and I don't
think that's very helpful.  Also, were the doc updates lost somehow, or
were they made irrelevant by other concurrent pg_test_timing
development?

Thanks

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"Ninguna manada de bestias tiene una voz tan horrible como la humana" (Orual)

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