Well, I tried it, and your ASP was about 3x *slower* than your ASPX, and
my ASPX with the StringBuilder and only 1 call to Response.Write,
instead of your ~10000 calls, was about 1/3 faster than your ASPX. So
who knows... I imagine there are many, many factors that could affect
this, and our two samples hardly make a conclusive data set.
-Jason
BlueBall wrote:
[color=blue]
> StringBuilder doesn't help because in my code, I don't actually repeat the
> buffer generating part.
>
> Try to run it on your IIS, you will see what I mean. In order to verify
> this is an ASPX performance problem (or possible my coding algorithm or
> config problem), I have created an old fashion ASP page:
>
> <%
> dim i, j, size, buffer
> size= 10048576
> for i = 1 to 1024
> buffer = buffer & "x"
> next
> for j = 1 to (size / 1024)
> response.write(buffer)
> next
> %>
>
> Create a hyper link in a new HTML page and link to this ASP page, and then
> create another link that links to ASPX page you wrote (or the one I posted
> earlier). You can see the BIG difference in performance. ASP page is
> faster than ASPX page at least 3 times... I am frustrated!!!
>
> B.B.
>
>
>
> "Jason DeFontes" <jason@defontes.com> wrote in message
> news:%23YKwcUSOEHA.644@tk2msftngp13.phx.gbl...
>[color=green]
>>String concatenation, whether you user String.Concat or +=, is
>>incredibly expensive because it makes a new copy of the string every
>>time. Try this instead:
>>
>> int size= 10048576; // around 10 MB data
>> StringBuilder buffer = new StringBuilder(size);
>> for (int j=1; j<=size; j++)
>> {
>> buffer.Append("x");
>> }
>> Response.Write(buffer.ToString());
>>
>>-Jason
>>
>>
>>BlueBall wrote:
>>
>>[color=darkred]
>>>I am writing some kind of network testing tool and I have wrote the
>>>following code in ASP.NET with C#
>>>
>>> int size= 10048576; // around 10 MB data
>>> string buffer = "";
>>> for (int j=1; j<=1024; j++) {
>>> buffer = String.Concat(buffer, "x");
>>> // I tried buffer += "x"; same performance
>>> }
>>>
>>> for (int i=1; i<=(size/1024); i++) {
>>> Response.Write(buffer);
>>> // I tried using <asp:literal> same thing
>>> }
>>>
>>>From another computer, I downloaded this file by making that as a link[/color][/color]
>
> in
>[color=green][color=darkred]
>>>HTML. It was so slow.. I get around 8 Mbps on a 100 Mbps LAN.. In[/color][/color]
>
> order
>[color=green][color=darkred]
>>>to compare, I tested with a real JPG file I got 25 Mbps! Also, I wrote[/color][/color]
>
> the
>[color=green][color=darkred]
>>>same thing in PHP using exactly same algorithm. I got around 25 Mbps!
>>>
>>>Anyone knows why ASPX performance is slow? is it configruation problem?
>>>IIS? or is it Response.write not good? I also tried using <asp:[/color][/color]
>
> literal>
>[color=green][color=darkred]
>>>same thing.. help..
>>>
>>>Thanks in advance
>>>
>>>
>>>
>>>
>>>[/color][/color]
>
>
>[/color]
