| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Kevin Grittner <kgrittn(at)mail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Parser Cruft in gram.y |
| Date: | 2012-12-20 15:35:56 |
| Message-ID: | 20121220153555.GH4303@awork2.anarazel.de |
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| Lists: | pgsql-hackers |
On 2012-12-20 16:04:49 +0100, Andres Freund wrote:
> On 2012-12-20 15:51:37 +0100, Andres Freund wrote:
> When doing a source/assembly annotation in SearchCatCache about half of
> the misses are attributed to the memcpy() directly at the beginning.
Using a separate array for storing the arguments instead of copying &
modifying cache->cc_skey yields a 2% speedup in pgbench -S for me...
The attached patch is clearly not ready and I don't really have time &
energy to pursue it right now, but it seems interesting enough to
post. The approach seems solid and sensible although the implementation
is not (too much c&p, no comments).
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
| Attachment | Content-Type | Size |
|---|---|---|
| separate-args-from-scankeydata.patch | text/x-patch | 9.1 KB |
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