即使在重新分配后，GPUImageFilters中的某些内容仍保留在内存中

I'm using GPUImage to do a bunch of image processing both in real time and on static images, I noticed that after churning through ~100 thumbnail images each of which has slightly different image processing done to each that there are still objects in memory after they're done processing and they're all related to GPUImageFilters:I'm using GPUImage to do a bunch of image proce