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From: Arthur Dent on 8 Jul 2008 11:52
I was wondering, ... does anyone know off hand which is faster?

I've seen articles where people suggest the method of using XML literals to
build strings... something like:

Dim s As String = <s>This is some string, built on <%= Format(Now,
"MM/dd/yyyy HH:mm") %></s>.Value

and I'm just curious how this might compare in speed to using String.Format,
more like:

Dim s As String = String.Format("This is some string, built on {0}",
Format(Now, "MM/dd/yyyy HH:mm"))

From: Göran Andersson on 8 Jul 2008 15:06
Arthur Dent wrote:
> I was wondering, ... does anyone know off hand which is faster?
>
> I've seen articles where people suggest the method of using XML literals
> to build strings... something like:
>
> Dim s As String = <s>This is some string, built on <%= Format(Now,
> "MM/dd/yyyy HH:mm") %></s>.Value

I'm not sure if an xml literal will end up as a string or as an object
tree, but either way you are adding another layer that the code has to
work through to get to the result.

> and I'm just curious how this might compare in speed to using
> String.Format, more like:
>
> Dim s As String = String.Format("This is some string, built on {0}",
> Format(Now, "MM/dd/yyyy HH:mm"))

I don't see why you are using the Format function in a call to
String.Format. Use the String.Format method as it was intended:

Dim s As String = String.Format("This is some string, built on
{0:MM/dd/yyyy HH:mm}", Now)

If you only have a single value to format, you can do the same with an
overload of the ToString method:

Dim s As String = Now.ToString("'This is some string, built on
'MM/dd/yyyy HH:mm")

I believe the last one is the most efficient way to format a date into a
string.

--
G�ran Andersson
_____
http://www.guffa.com
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