@Nullable
  @Override
  public CacheKey getPostprocessorCacheKey() {
    return mPostprocessor.getPostprocessorCacheKey();
  }
Postprocessor that measures the performance of {@link BasePostprocessor#process(Bitmap, Bitmap)}.
samples/showcase/src/main/java/com/facebook/fresco/samples/showcase/postprocessor/BenchmarkPostprocessorForDuplicatedBitmap.java