Re: [xml] Useless function calls in xmlSetProp()?

[Julien Charbon <jch 4js com>]

 Hi,

Stefan Behnel wrote:
> Julien Charbon wrote:
> > - With old xmlSetProp():
> >
> > $ ./test-setprop-big
> > Size:   8       Time:   000:000014397
> > Size:   16      Time:   000:000003429
> > Size:   32      Time:   000:000003164
> [...]
> > - With "new" [now current] xmlSetProp():
> >
> > $ ./test-setprop-big
> > Size:   8       Time:   000:000004981
> > Size:   16      Time:   000:000001847
> > Size:   32      Time:   000:000000906
> [...]
> >  [Yes, attributes with value size of 1 MB are unrealistic, it is just to
> > show how xmlSetProp() scaled before setprop.patch]
>
> There is a huge difference for small strings, though. Any idea why the (most
> common) really short string values take three times as long as the somewhat
> longer ones? Or is it just the usual benchmark uncertainty?
>
> What is the time scale you used above anyway?

 The time scale is "seconds:nanoseconds". Thus, "000:000004981" means 
0 secondes and 4981 nanoseconds and "078:606054215" means 78 seconds 
and 606 milliseconds.

 Here times value on tiny size are not significant [too much 
uncertainty due to CPU cache, memory cache, etc...], the important 
point on these values is how they scale depending on XML attribute 
value size.

--
Julien