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Page tuning: what happens between PreRender and SaveViewState?

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Kirk Marple (VIP)

i was doing some server control perf testing - specifically seeing how much
slower <asp:Label> rendering is vs. writing out the tag myself.

when using trace.axd for app level tracing, i'm seeing 50% or more of the
page request time occurring between aspx.page: End PreRender and aspx.page:
Begin SaveViewState.

what's happening between these two states? it seems to be proportional to
the render time of the page.

(the page being rendered contains a DataList with 3000 rows, each of which
has either an <asp:Label> tag in it, or a tag. this is just a perf
test, not a page with live data.)

thanks for any info!
Kirk

----------------------------------
Kirk Marple
CTO, VP of Engineering
Streaming Media Technologies, Inc.
800 5th Ave, Suite 101-358
Seattle, WA 98104
c: 206.251.4820
e: Click here to reveal e-mail address
w: http://www.streamingmediatech.com

Sent using the Entourage X Test Drive.

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Susan Warren

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Kirk --
=20
The *only* thing that happens between End PreRender and Begin
SaveViewState is building up and rendering the tree for the Trace
feature. So you are measuring the cost of your perf testing :) Trace
is at best an approximate means of measuring performance. =20
=20
Our perf guru, Fabio Yeon, wrote a whitepaper about performance and
ASP.NET, including a bit about testing methodology. You can check it
out at:
http://www.gotdotnet.com/team/asp/asp.net%20performance%20tips%20and%20t
ricks.aspx.
=20
hth,
Susan

 -----Original Message-----
 From: Kirk Marple [mailto:Click here to reveal e-mail address]=20
 Sent: Friday, January 18, 2002 2:48 AM
 To: aspngspeed
 Subject: [aspngspeed] Page tuning: what happens between
PreRender and SaveViewState?
=09
=09
 i was doing some server control perf testing - specifically
seeing how much slower <asp:Label> rendering is vs. writing out the
 tag myself.
=09
 when using trace.axd for app level tracing, i'm seeing 50% or
more of the page request time occurring between aspx.page: End PreRender
and aspx.page: Begin SaveViewState.
=09
 what's happening between these two states? it seems to be
proportional to the render time of the page. =20
=09
 (the page being rendered contains a DataList with 3000 rows,
each of which has either an <asp:Label> tag in it, or a tag.
this is just a perf test, not a page with live data.)
=09
 thanks for any info!
 Kirk
=09
 ----------------------------------
 Kirk Marple
 CTO, VP of Engineering
 Streaming Media Technologies, Inc.
 800 5th Ave, Suite 101-358
 Seattle, WA 98104
 c: 206.251.4820
 e: Click here to reveal e-mail address
 w: http://www.streamingmediatech.com
=09
=09
=09
=09
=09

 Sent using the Entourage X Test Drive.

 | [aspngspeed] member Click here to reveal e-mail address =3D YOUR ID
 | http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT
 | http://www.asplists.com/search =3D SEARCH Archives
=09

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Message</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR></HEAD>
<BODY>
<DIV>Kirk=20
--</DIV>
<DIV> </DIV>
<DIV>The=20
*only* thing that happens between End PreRender and Begin SaveViewState =
is=20
building up and rendering the tree for the Trace feature. So you =
are=20
measuring the cost of your perf testing :) Trace is at best an =
approximate=20
means of measuring performance. </DIV>
<DIV> </DIV>
<DIV>Our=20
perf guru, Fabio Yeon, wrote a whitepaper about performance and ASP.NET, =

including a bit about testing methodology. You can check it out =
at: <A=20
href=3D"http://www.gotdotnet.com/team/asp/asp.net%20performance%20tips%20=
and%20tricks.aspx">http://www.gotdotnet.com/team/asp/asp.net%20performanc=
e%20tips%20and%20tricks.aspx</A>.</DIV>
<DIV> </DIV>
<DIV>hth,</DIV>
<DIV>Susan</DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma size=3D2>-----Original Message----- From: Kirk =
Marple=20
[mailto:Click here to reveal e-mail address] Sent: Friday, January =
18, 2002=20
2:48 AM To: aspngspeed Subject: [aspngspeed] Page =
tuning:=20
what happens between PreRender and =
SaveViewState? </DIV><FONT=20
face=3DVerdana>i was doing some server control perf testing - =
specifically=20
seeing how much slower <asp:Label> rendering is vs. writing out =
the=20
 tag myself. when using trace.axd for app level =
tracing,=20
i'm seeing 50% or more of the page request time occurring between =
aspx.page:=20
End PreRender and aspx.page: Begin =
SaveViewState. what's=20
happening between these two states? it seems to be proportional =
to the=20
render time of the page. (the page being rendered =
contains a=20
DataList with 3000 rows, each of which has either an <asp:Label> =
tag in=20
it, or a tag. this is just a perf test, not a page =
with=20
live data.) thanks for any=20
info! Kirk ---------------------------------- Kirk =
Marple CTO,=20
VP of Engineering Streaming Media Technologies, Inc. 800 5th =
Ave, Suite=20
101-358 Seattle, WA 98104 c: 206.251.4820 e:=20
Click here to reveal e-mail address w:=20
http://www.streamingmediatech.com 
Sent using the Entourage X Test Drive.| [aspngspeed] member=20
Click here to reveal e-mail address =3D YOUR ID |=20
http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT |=20
http://www.asplists.com/search =3D SEARCH =
Archives </BLOCKQUOTE></BODY></HTML>
=00
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Susan Warren

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We're definitely in a Tahiti state of mind :)

 -----Original Message-----
 From: Kirk Marple [mailto:Click here to reveal e-mail address]=20
 Sent: Friday, January 18, 2002 10:05 AM
 To: aspngspeed
 Subject: [aspngspeed] RE: Page tuning: what happens between
PreRender and SaveViewState?
=09
=09
 ah, that's kinda funny... now that makes more sense.
=09
 thanks for the quick response, Susan!
=09
 gee, i thought the ASP.NET team would all be in Tahiti right
now... ;)
=09
 On 1/18/02 7:14 AM, "Susan Warren" <Click here to reveal e-mail address>
wrote:
=09
=09

 Kirk --
 =09
 The *only* thing that happens between End PreRender and
Begin SaveViewState is building up and rendering the tree for the Trace
feature. So you are measuring the cost of your perf testing :) Trace
is at best an approximate means of measuring performance. =20
 =09
 Our perf guru, Fabio Yeon, wrote a whitepaper about
performance and ASP.NET, including a bit about testing methodology. You
can check it out at:
http://www.gotdotnet.com/team/asp/asp.net%20performance%20tips%20and%20t
ricks.aspx.
 =09
 hth,
 Susan
 =09

 -----Original Message-----
 From: Kirk Marple
[mailto:Click here to reveal e-mail address]=20
 Sent: Friday, January 18, 2002 2:48 AM
 To: aspngspeed
 Subject: [aspngspeed] Page tuning: what happens
between PreRender and SaveViewState?
 =09
 i was doing some server control perf testing -
specifically seeing how much slower <asp:Label> rendering is vs. writing
out the tag myself.
 =09
 when using trace.axd for app level tracing, i'm
seeing 50% or more of the page request time occurring between aspx.page:
End PreRender and aspx.page: Begin SaveViewState.
 =09
 what's happening between these two states? it
seems to be proportional to the render time of the page. =20
 =09
 (the page being rendered contains a DataList
with 3000 rows, each of which has either an <asp:Label> tag in it, or a
 tag. this is just a perf test, not a page with live data.)
 =09
 thanks for any info!
 Kirk
 =09
 ----------------------------------
 Kirk Marple
 CTO, VP of Engineering
 Streaming Media Technologies, Inc.
 800 5th Ave, Suite 101-358
 Seattle, WA 98104
 c: 206.251.4820
 e: Click here to reveal e-mail address
 w: http://www.streamingmediatech.com
 =09
 =09
 =09
 =09
 =09
 Sent using the Entourage X Test Drive.
 | [aspngspeed] member Click here to reveal e-mail address =3D
YOUR ID
 |
http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT
 | http://www.asplists.com/search =3D SEARCH
Archives
 =09

 =09
 =09
_____ =20

 | [aspngspeed] member Click here to reveal e-mail address =3D YOUR
ID
 | http://www.asplists.com/asplists/aspngspeed.asp =3D
JOIN/QUIT
 | http://www.asplists.com/search =3D SEARCH Archives
 =09
 =09
 =09

=09
=09
 ----------------------------------
 Kirk Marple
 CTO, VP of Engineering
 Streaming Media Technologies, Inc.
 800 5th Ave, Suite 101-358
 Seattle, WA 98104
 c: 206.251.4820
 e: Click here to reveal e-mail address
 w: http://www.streamingmediatech.com
=09
=09
=09
=09
=09

 Sent using the Entourage X Test Drive.

 | [aspngspeed] member Click here to reveal e-mail address =3D YOUR ID
 | http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT
 | http://www.asplists.com/search =3D SEARCH Archives
=09

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Message</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<META content=3D"MSHTML 6.00.2712.300" name=3DGENERATOR></HEAD>
<BODY>
<DIV>We're=20
definitely in a Tahiti state of mind :)</DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma size=3D2>-----Original Message----- From: Kirk =
Marple=20
[mailto:Click here to reveal e-mail address] Sent: Friday, January =
18, 2002=20
10:05 AM To: aspngspeed Subject: [aspngspeed] RE: =
Page=20
tuning: what happens between PreRender and=20
SaveViewState? </DIV>ah, that's =
kinda=20
funny... now that makes more sense. thanks for the quick =
response,=20
Susan! gee, i thought the ASP.NET team would all be in Tahiti =
right=20
now... ;) On 1/18/02 7:14 AM, "Susan Warren"=20
<Click here to reveal e-mail address> wrote: 
<BLOCKQUOTE>Kirk=20
-- <FONT=20
color=3D#800080>The *only* thing =
that happens=20
between End PreRender and Begin SaveViewState is building up and =
rendering=20
the tree for the Trace feature. So you are measuring the cost =
of your=20
perf testing :) Trace is at best an approximate means of =
measuring=20
performance. <FONT=20
face=3DVerdana> Our perf guru, Fabio Yeon, wrote a whitepaper about =
performance=20
and ASP.NET, including a bit about testing methodology. You =
can check=20
it out at:=20
=
http://www.gotdotnet.com/team/asp/asp.net%20performance%20tips%20and%20tr=
icks.aspx. <FONT=20
face=3DVerdana> hth, Susan 
<BLOCKQUOTE>-----Original=20
Message----- From: Kirk Marple=20
[mailto:Click here to reveal e-mail address] Sent: Friday, =
January 18,=20
2002 2:48 AM To: aspngspeed Subject: =
[aspngspeed] Page=20
tuning: what happens between PreRender and=20
SaveViewState? i was =
doing some=20
server control perf testing - specifically seeing how much slower=20
<asp:Label> rendering is vs. writing out the =
tag=20
myself. when using trace.axd for app level tracing, i'm =
seeing 50%=20
or more of the page request time occurring between aspx.page: =
End=20
PreRender and aspx.page: Begin =
SaveViewState. what's=20
happening between these two states? it seems to be =
proportional to=20
the render time of the page. (the page being =
rendered=20
contains a DataList with 3000 rows, each of which has either an=20
<asp:Label> tag in it, or a tag. this is =
just a=20
perf test, not a page with live data.) thanks for any=20
info! Kirk ---------------------------------- Kirk=20
Marple CTO, VP of Engineering Streaming Media Technologies,=20
Inc. 800 5th Ave, Suite 101-358 Seattle, WA 98104 c:=20
206.251.4820 e: Click here to reveal e-mail address w:=20
http://www.streamingmediatech.com Sent =
using the=20
Entourage X Test Drive. | [aspngspeed] member =
Click here to reveal e-mail address =3D=20
YOUR ID | http://www.asplists.com/asplists/aspngspeed.asp =3D=20
JOIN/QUIT | http://www.asplists.com/search =3D SEARCH=20
Archives </BLOCKQUOTE> 
<HR align=3Dcenter width=3D"95%" SIZE=3D3>
<TT>| [aspngspeed] member=20
Click here to reveal e-mail address =3D YOUR ID |=20
http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT |=20
http://www.asplists.com/search =3D SEARCH=20
Archives </TT></BLOCKQUOTE><FONT=20
face=3DMonaco><TT> </TT><FONT=20
face=3DVerdana> ---------------------------------- Kirk =
Marple CTO, VP=20
of Engineering Streaming Media Technologies, Inc. 800 5th Ave, =
Suite=20
101-358 Seattle, WA 98104 c: 206.251.4820 e:=20
Click here to reveal e-mail address w:=20
http://www.streamingmediatech.com 
Sent using the Entourage X Test Drive.| [aspngspeed] member=20
Click here to reveal e-mail address =3D YOUR ID |=20
http://www.asplists.com/asplists/aspngspeed.asp =3D JOIN/QUIT |=20
http://www.asplists.com/search =3D SEARCH =
Archives </BLOCKQUOTE></BODY></HTML>
=00
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System.Web.UI.WebControls.DataList

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