[Mono-list] XML / XPaths Very Slow Compared to MS C#

[Atsushi Eno]

Hello,

That's interesting. If I have enough time I'll check what are likely
culprits with modified version of the cases and possibly fix them.

Atsushi Eno

Bradford Stephens wrote:
> Hello all,
> 
> It seems that XPath selection is several orders of magnitude slower in
> Mono 2.0 on Ubuntu than on C# on Windows XP.
> 
> The example below is pretty straightforward, and doesn't seem like
> it's much slower, but we do this millions of times a day. In some
> cases, I've seen parsing a document go from 10 ms on Windows to over
> 2000 ms on Mono 2.0/Linux.
> 
> I've made a Mono Project to let you test it yourselves:
> http://www.giborama.com/TestSlowXML.tar
> 
> I've advocated the switch of our company's platform from Windows to
> Linux, but XML/XPath is an essential part of the business, and with it
> being so slow, we're dead in the water.
> 
> I would greatly appreciate any help you may have :)
> 
> ~~~~
> 
> Windows XP / C# 2005:
> 
> Xpath: //head/title took 2
> Xpath: //div[@id= 'content']/div[starts-with (@id, 'p')] took 0
> Xpath: .//h2/a took 0
> Xpath: .//p[@class= 'byline']/a[position()=1] took 0
> Xpath: .//p[@class= 'byline'] took 1
> Xpath: .//h2 took 0
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')] took 0
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')]//img took 0
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')]//a took 0
> Xpath: //p[@class= 'paging']/a[@class= 'alignright arrowforward'] took 0
> 
> 
> Ubuntu / Mono 2.0:
> 
> Xpath: //head/title took 24
> Xpath: //div[@id= 'content']/div[starts-with (@id, 'p')] took 8
> Xpath: .//h2/a took 1
> Xpath: .//p[@class= 'byline']/a[position()=1] took 5
> Xpath: .//p[@class= 'byline'] took 3
> Xpath: .//h2 took 1
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')] took 5
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')]//img took 5
> Xpath: .//div[@class= 'post']/div[starts-with (@id, 'pc')]//a took 5
> Xpath: //p[@class= 'paging']/a[@class= 'alignright arrowforward'] took 8
> 
> Cheers,
> Bradford
> _______________________________________________
> Mono-list maillist  -  Mono-list at lists.ximian.com
> http://lists.ximian.com/mailman/listinfo/mono-list
>