ListConvolve Memory Hemorrhage

Question

Bug introduced in 10.0.0 and fixed in 10.2.0.

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I wrote a routine that convolves an impulse response array with a test array and checks for the RMS difference between that convolution and a data array. I do this iteratively so that I can modify the test array to obtain an improved fit to the data and eventually generate a good prediction of the test array required to produce the data.

I noticed that my memory in use increases steadily (I've narrowed it down to the ListConvolve function) and I'm hoping someone knows how to mitigate this memory drain.

Here is a simplified code to demonstrate this effect:

z = 1;
herp = Table[1, {i, 1, 10^2}];
derp = Table[0, {i, 1, 10^2}];
Monitor[
 While[z < 10^6,

  ListConvolve[derp, herp, 1];

  z++;
  blurg = MemoryInUse[];
  ClearSystemCache[];
  $HistoryLength = 0;
 ];
,{z, blurg}];

Removing the ListConvolve part of the code leaves the memory in use flat.

Any help is greatly appreciated!

Answer 1

To record an answer officially:

As noted by Daniel Lichtblau in a comment, it is a bug. Szabolcs comments that it affects versions 10.0.1, 10.0.2, and 10.1.0, but not versions before 10 (and unclear about 10.0.0). As of the time of writing, version 10.1.0 is the most recently released. However, Daniel further adds that it has already been fixed in the development version.