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

[Atsushi Eno]

I'm not with free hand and cannot immediately work on it.

What I know so far is that .NET outperforms only 2x difference over
Mono on XSLTMark C# port (2x is not a small difference, but not that
much as your testcases try to impress).

Atsushi Eno


Bradford Stephens wrote:
> Hey there,
> 
> Has anyone gotten a chance to look into this? :)
> 
> Cheers,
> Bradford
> 
> On Wed, Sep 10, 2008 at 2:19 PM, Bradford Stephens
> <bradfordstephens at gmail.com> wrote:
>> Thanks, I appreciate it. This has the team stumped :)
>>
>> On Tue, Sep 9, 2008 at 6:10 PM, Atsushi Eno <atsushi at ximian.com> wrote:
>>> 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
>>>>
>>>
>