Bug 255526

Summary:	net-im/ejabberd speed up by compiling xml.erl natively
Product:	Gentoo Linux	Reporter:	Craig Andrews <candrews>
Component:	New packages	Assignee:	Caleb Tennis (RETIRED) <caleb>
Status:	RESOLVED NEEDINFO
Severity:	normal	CC:	net-im
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://metajack.im/2009/01/18/speed-up-ejabberd/
Whiteboard:
Package list:		Runtime testing required:	---

Description Craig Andrews gentoo-dev

2009-01-19 17:33:36 UTC

Erlang components can be compiled natively. Since the xml component of ejabberd is used so often, and is so performance critical, compiling it natively can give a speed improvement.

"go to the directory with xml.erl and run the compiler:

cd ejabberd/src
erlc +native xml.erl

Finally, move the xml.beam file into your ebin directory."

I think this should be done during the compile phase. See http://metajack.im/2009/01/18/speed-up-ejabberd/ for more information.

Reproducible: Always

Comment 1 Peter Volkov (RETIRED) gentoo-dev

2009-03-16 15:18:55 UTC

Thank you for report candrews. Unfortunately I don't think it's wise to enable this feature distribution wide based on the information we have. There are no real numbers in that blog how faster this feature makes ejabberd in general. There is just rough estimate for one function. Please provide us with numbers and then we'll definitely reconsider our current resolution.

Also note, there in comments is the following:
"You are loosing features by using HiPE (stacktrace) and the performance increase must be tested because context switching between native and non native can cost quite a lot as well."

So again without real tests I don't see how this is useful.