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brianwmunz / svgReader-QV11

Repository for storing the code for the svgMap extension for QlikView 11.
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Memory leak #17

Open jonoogle opened 8 years ago

jonoogle commented 8 years ago

We have an app which is "refreshing" every 10 seconds using another extension which just increments a Qlik variable at a regular interval (modified version of QvTicker - https://github.com/thomasfriebel/QvTicker). The effect is that objects are displayed conditionally based on the value of the variable giving the illusion of a slideshow presentation.

We noticed that after a full day some browsers were crashing. Investigating further we found that it is most likely due to memory usage. Isolating the problem we made a version of the map without any SVG objects and ran it concurrently with the app with the objects and no other charts. The result after 5 hours was that the app without any SVG maps was about 35MB (Chrome Task Manager measure) and was stable. The app with 4 SVG maps was 400MB and steadily increasing.

I love this extension. It is really well done and extremely useful. It would be nice if this issue could be addressed.

jonoogle commented 8 years ago

Here is an example. I took the counties example, removed the tables, made the extension conditional on a variable hideShow and then made a button which flipflops hideShow. If you keep clicking on it memory usage increases but never comes down to original value.

svgMapMemLeak.zip