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Updated and new benchmarks [message #14774]

Fri, 14 March 2008 12:58

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

I have adjusted numbers in U++ vs C++ std:: benchmarks

http://www.ultimatepp.org/www$uppweb$vsstd$en-us.html

and also created a new one, this time comparing C++ with D:

http://www.ultimatepp.org/www$uppweb$vsd$en-us.html

Almost 5 times faster than GCC's std:: implementation in supposedly I/O limited benchmark and 70% faster than D... not bad Smile

I guess we are now finaly approaching the "physical limits of silicon" Smile

Mirek

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Re: Updated and new benchmarks [message #14781 is a reply to message #14774]

Fri, 14 March 2008 15:52

cbpporter
Messages: 1427
Registered: September 2007

Ultimate Contributor

luzr wrote on Fri, 14 March 2008 13:58

I guess we are now finaly approaching the "physical limits of silicon" Smile

Mirek

Interesting results. What has been done to obtain an almost double performance since last time?

edit:

luzr wrote on Fri, 14 March 2008 13:56

Inequality comparison of small strings are now heavily optimized, Sorting Vector<String> is now almost twice as fast (if most strings are < 15 characters).

Mirek

I've read this after my post.

[Updated on: Fri, 14 March 2008 15:54]

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Re: Updated and new benchmarks [message #14783 is a reply to message #14774]

Fri, 14 March 2008 17:02

zsolt
Messages: 702
Registered: December 2005
Location: Budapest, Hungary

Contributor

The title of third column should be "D language / U++".

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Re: Updated and new benchmarks [message #14786 is a reply to message #14783]

Fri, 14 March 2008 18:44

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

zsolt wrote on Fri, 14 March 2008 12:02

The title of third column should be "D language / U++".

Well, depends. Strictly said, yes. But maybe it is confusing that way too.

Mirek

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Re: Updated and new benchmarks [message #14787 is a reply to message #14781]

Fri, 14 March 2008 18:45

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

cbpporter wrote on Fri, 14 March 2008 10:52

luzr wrote on Fri, 14 March 2008 13:58

I guess we are now finaly approaching the "physical limits of silicon" Smile

Mirek

Interesting results. What has been done to obtain an almost double performance since last time?

edit:

luzr wrote on Fri, 14 March 2008 13:56

Inequality comparison of small strings are now heavily optimized, Sorting Vector<String> is now almost twice as fast (if most strings are < 15 characters).

Mirek

I've read this after my post.

Actually, this last optimization was only the last 2-7% improvement. The majority is from new String implementation, using SSO with very fast equality comparison and hash value generation.

Mirek

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Re: Updated and new benchmarks [message #15226 is a reply to message #14774]

Thu, 10 April 2008 15:07

jmansion
Messages: 15
Registered: April 2006
Location: London

Promising Member

These numbers are interesting enough to renew my interest in ntl. And lo, my password reset info comes from cxl@ntllib.org.

But www.ntllib.org returns 403 (Forbidden).

Oh well. Crying or Very Sad

How can I access the ntllib files, and can they be used without 'all' of UPP?

Also - do you know how your heap implementation stacks up against nedmalloc or jemalloc?

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Re: Updated and new benchmarks [message #15229 is a reply to message #15226]

Thu, 10 April 2008 17:33

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

jmansion wrote on Thu, 10 April 2008 09:07

These numbers are interesting enough to renew my interest in ntl. And lo, my password reset info comes from cxl@ntllib.org.

But www.ntllib.org returns 403 (Forbidden).

Site is basically abandoned. NTL was sort of "U++ preview"...

Quote:

How can I access the ntllib files, and can they be used without 'all' of UPP?

Not quite possible now. Sorry.

We are sort of looking for volunteer that would take on this task ("extracting" NTL from U++ sources).

Quote:

Also - do you know how your heap implementation stacks up against nedmalloc or jemalloc?

First time I hear those names Smile

It would be nice to test - if you have time Smile

From the brief excursion via google, there was too little info to grasp nedmalloc or jemalloc.

It is also true that U++ allocator is still quite concerned about single-threaded performance; there is some solution to cache-line contention problem, but hard to say how it works in practice. New allocator is very specifically tuned for U++ framework too.

However, single-threaded performance is now so effective, that checking for NULL (C++ standard requirement) is now visible as a couple of percents performance degradation Smile

Mirek

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