message: Add comments to note: currently we're not inspecting the persistent tensor
  contents to see if the cached data is being resued.
diff: @@ -657,6 +657,10 @@ public:
  CommonTestUtilities<quint8> conv_comp;
  conv_comp.ConvertAndCompareIntegral(dtype, output, output_layout, expected);
  + // TODO(wenxi): For now, we rely on internal performance tests to
  + // determine if filter data is being cached and reused.
  + // However, we still need to add a check here to determine if this is
  + // still the case by inspecting the contents of the persistent tensor.
  TF_ASSERT_OK(RunOpKernel());
  // Compare output to expected results
  