Re: [xml] 2.5.x performance vs. 2.4.24

[Daniel Veillard <veillard redhat com>]

On Tue, Aug 12, 2003 at 06:59:56PM -0700, Grant Goodale wrote:
>       (I know there's at least one other thread on this, but I joined the
> list too late to get in on it.  Sorry.)
>
>       In comparing the aforementioned version of libxml2 (built from tarballs
> on the same machine) I ran the following command: 
>
>        xmllint --noout --timing --memory ~/foo.xml
>
> where foo.xml is a well-formed 3.5mb xml file, and got the following
> results:
>
> 2.4.24: 
> Parsing took 327 ms
> Freeing took 52 ms
>
> 2.5.8:
> Parsing took 34013 ms
> Freeing took 114 ms
>
>       RH AS2.1, Dual P4 (Seen as 4 procs - yay HT), 2GB memory, kernel
> 2.4.9-e.25, glibc-2.2.4-32.3.  Anyone seen anything similar on large
> documents?  strace shows a large number of calls to brk() taking up most
> of the time:
>
> 18:55:33.594680 brk(0x8060000)          = 0x8060000
> 18:55:33.606823 brk(0x8061000)          = 0x8061000
> ---snip---
> 18:56:07.875950 brk(0x9209000)          = 0x9209000
> 18:56:07.876090 brk(0x920a000)          = 0x920a000

  I can't explain this. Try to configure without threads and rerun,
but without any reproducable example I never saw anything similar,
and have no idea what the problem is.

Daniel

-- 
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