[LON-CAPA-users] Slow response from clicking on "Course Contents"

Gerd Kortemeyer korte at lite.msu.edu
Tue May 29 20:57:44 EDT 2012

Hi Amos,

Is this a "timed" quiz, i.e., a quiz that is open for a student for a certain amount of time after he or she started? If yes, the issue has been fixed:


If it's not a timed quiz, I don't know. The choice of math renderer should not have an influence on the speed of "Course Contents."

- Gerd.

On May 29, 2012, at 8:49 PM, Amos Lee wrote:

> Hi,
> I'm wondering if anyone else has a similar experience.
>   We upgraded Lon Capa from version 2.5.0-2007081514 to version
> 2.10.0-2011060317 in the summer of 2011.  Since the upgrade, we always notice that the response time after one clicks on "Course Contents" has increased by about a factor of six.
>   More specifically, we run a Placement Test with 30 questions.  Back when we were using version 2.5.0, it took about 5 seconds (and in all cases no more than 10 seconds) to get a total response from Lon Capa on the status of all 30 questions (that is, which questions have/have not been submitted, and how much time is left before timing out, etc).
>   But with version 2.10.0, we immediately noticed that it took about 15 to 20 seconds to get an initial response from the system on the first 15 to 18 questions, and then one has to wait for another 15 seconds or so to get the rest of it from the system.  All-in-all, after click on Course Contents, it would generally take 30 to 35 seconds before one can tell which questions have not been submitted and how much time is left.  So students and TAs are not eager to click on Course Contents, especially toward the end of the test when time is close to running out.
>   I'm wondering whether this sluggish response to clicking on "Course Contents" that we have been experiencing is unique to our installation. There has been no change at all to our implementation of our Placement Test since we started using 2.5.0. It is the same Test ("Course") that we cloned every time we run it.  I'm also wondering whether it has something to do with our reliance on "Convert to images" for the "Force use of a specific math rendering engine" parameter.
> Thanks,
> Amos Lee
> Math & Stats
> Univ of Sask
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