Is the object loaded by the USE directive cached between requests?

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Does the USE directive load a new instance of the object per request? Or is
it cached?

I'm trying to speed up a legacy app that uses TT (which is new to me). I
discovered the app was making numerous identical database calls to retrieve
the authenticated user's info.

Each template includes the line [% USE Util; %] at the top -- it's this
class where the user info is retrieved. I modified Util.pm so that it
checks to see if it already has a user property, checks to make sure the
user property contains the same username as the requested user, and if so
returns that instead of generating a database call.

This drops the load time by 75%, but I am concerned that the change may
introduce a race condition. If 2 users request the page at the same time
and the Util object is shared, it's possible that user A's info could be
returned to user B, or vice-versa.

Thanks in advance,
Chris

-- 
Chris Herdt
Web Applications Developer
http://osric.com/chris/

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<div dir=3D"ltr"><div>Does the USE directive load a new instance of the obj=
ect per request? Or is it cached?</div><div><br></div>I&#39;m trying to spe=
ed up a legacy app that uses TT (which is new to me). I discovered the app =
was making numerous identical database calls to retrieve the authenticated =
user&#39;s info.<div><br></div><div>Each template includes the line [% USE =
Util; %] at the top -- it&#39;s this class where the user info is retrieved=
. I modified Util.pm so that it checks to see if it already has a user prop=
erty, checks to make sure the user property contains the same username as t=
he requested user, and if so returns that instead of generating a database =
call.</div><div><br></div><div>This drops the load time by 75%, but I am co=
ncerned that the change may introduce a race condition. If 2 users request =
the page at the same time and the Util object is shared, it&#39;s possible =
that user A&#39;s info could be returned to user B, or vice-versa.</div><di=
v><br></div><div>Thanks in advance,</div><div>Chris=C2=A0<div><br></div>-- =
<br><div class=3D"gmail_signature">Chris Herdt<br>Web Applications Develope=
r<br><a href=3D"http://osric.com/chris/" target=3D"_blank">http://osric.com=
/chris/</a></div>
</div></div>

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