[Discuss-gnuradio] Multiple flow graphs, proper design

[Ryan Pape]

I have a standalone application, that follows the following pattern:

While True:

  x  = dequeue()

  if X=A

  

    tb = gr.top_block()

    <create blocks>

    tb.connect(<blocks>)

    tb.run()

 if X=B

   similar but different set of blocks

Is this a right or wrong way to instantiate and use multiple flow graphs?  I am creating an entirely new top_block() on each iteration, of which there are 10-20 minute.  Over the course of several days, memory consumption grows and performance slows.  

As I try and narrow down the cause, I want to first rule out whether I am doing anything wrong on the GNURadio side of the equation by how I am creating and using multiple graphs.

Thanks