I'm using VNDocumentViewController to scan some documents which is working fine. But not infrequently, the app becomes slow after dismissing the VNDocumentViewController. There is no VNDocumentViewController instance allocated, but according to the allocations gathered by instruments, there is a ICDocCamViewController still living and using between 200 and 300 MB.
I guess that ICDocCamViewController is an internal component of VNDocumentViewController. Are there any known issues? Unfortunately, I do not see any way to free ICDocCamViewController.
281.37 MB 93.1% 104708 start_wqthread
281.37 MB 93.1% 104708 _pthread_wqthread
256.04 MB 84.7% 42747 _dispatch_workloop_worker_thread
256.03 MB 84.7% 42564 _dispatch_lane_invoke
256.03 MB 84.7% 42564 _dispatch_lane_serial_drain
249.91 MB 82.7% 22258 _dispatch_client_callout
237.01 MB 78.4% 8562 _dispatch_call_block_and_release
236.50 MB 78.3% 3836 __77-[ICDocCamViewController saveCapturedImage:metaData:rects:completionHandler:]_block_invoke_3
236.50 MB 78.3% 3836 -[ICDocCamViewController cropAndFilterImage:rects:filterType:]
236.49 MB 78.3% 3678 +[ICDocCamImageFilters filteredImage:orientation:imageFilterType:]
236.49 MB 78.3% 3678 +[ICDocCamImageFilters colorDocument:orientation:]
236.47 MB 78.3% 3476 -[CIContext(createCGImage) createCGImage:fromRect:]
236.47 MB 78.3% 3476 -[CIContext(_createCGImageInternal) _createCGImage:fromRect:format:premultiplied:colorSpace:deferred:renderCallback:]
236.40 MB 78.2% 2096 -[CIContext(CIRenderDestination) startTaskToRender:fromRect:toDestination:atPoint:error:]
236.40 MB 78.2% 2096 -[CIContext(CIRenderDestination) _startTaskToRender:toDestination:forPrepareRender:forClear:error:]
236.40 MB 78.2% 2096 CI::RenderToBitmap::render(CI::Image*, CI::Context*) const
236.40 MB 78.2% 2096 CI::image_get_bitmap(CI::Context*, CI::Image*, CGRect, CGColorSpace*, CI::Bitmap*, CI::RenderDestination const*)
236.33 MB 78.2% 716 CI::tile_node_graph(CI::Context*, CI::RenderDestination const*, char const*, CI::Node*, CGRect const&, CI::PixelFormat, CI::swizzle_info const&, CI::TileTask* (CI::ProgramNode*, CGRect) block_pointer)
236.33 MB 78.2% 716 CI::recursive_tile(CI::RenderTask*, CI::Context*, CI::RenderDestination const*, char const*, CI::Node*, CGRect const&, CI::PixelFormat, CI::swizzle_info const&, CI::TileTask* (CI::ProgramNode*, CGRect) block_pointer)
236.26 MB 78.2% 212 invocation function for block in CI::image_get_bitmap(CI::Context*, CI::Image*, CGRect, CGColorSpace*, CI::Bitmap*, CI::RenderDestination const*)
236.26 MB 78.2% 212 CI::Context::render(CI::ProgramNode*, CGRect const&)
236.26 MB 78.2% 212 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
236.26 MB 78.2% 211 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
236.24 MB 78.2% 196 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
236.23 MB 78.2% 181 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
236.21 MB 78.2% 166 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
236.19 MB 78.2% 151 CI::Context::recursive_render(CI::TileTask*, CI::roiKey const&, CI::Node*, bool)
17.02 KB 0.0% 14 CI::MetalTextureManager::create_intermediate(CI::IntermediateDescriptor const&, unsigned long long, CGRect const&, unsigned long, unsigned long, bool)
128 Bytes 0.0% 1 CI::MetalContext::render_intermediate_node(CI::TileTask*, CI::ProgramNode*, CGRect const&, CI::intermediate_t*, bool, void () block_pointer)
17.02 KB 0.0% 14 CI::MetalTextureManager::create_intermediate(CI::IntermediateDescriptor const&, unsigned long long, CGRect const&, unsigned long, unsigned long, bool)
128 Bytes 0.0% 1 CI::MetalContext::render_intermediate_node(CI::TileTask*, CI::ProgramNode*, CGRect const&, CI::intermediate_t*, bool, void () block_pointer)
17.02 KB 0.0% 14 CI::MetalTextureManager::create_intermediate(CI::IntermediateDescriptor const&, unsigned long long, CGRect const&, unsigned long, unsigned long, bool)
128 Bytes 0.0% 1 CI::MetalContext::render_intermediate_node(CI::TileTask*, CI::ProgramNode*, CGRect const&, CI::intermediate_t*, bool, void () block_pointer)
17.02 KB 0.0% 14 CI::MetalTextureManager::create_intermediate(CI::IntermediateDescriptor const&, unsigned long long, CGRect const&, unsigned long, unsigned long, bool)
128 Bytes 0.0% 1 CI::MetalContext::render_intermediate_node(CI::TileTask*, CI::ProgramNode*, CGRect const&, CI::intermediate_t*, bool, void () block_pointer)
128 Bytes 0.0% 1 CI::MetalContext::render_root_node(CI::TileTask*, CI::ProgramNode*, CGRect const&, void () block_pointer, void () block_pointer)
69.00 KB 0.0% 504 CI::gather_rois_for_program_graph(CI::Context*, char const*, CI::ProgramNode*, CGRect)
71.72 KB 0.0% 1380 CI::prepare_initial_graph(CI::Context*, char const*, CI::Image*, CI::RenderDestination const*, CGRect, CGColorSpace*, CI::PixelFormat, CI::swizzle_info, CI::Affine const&, bool, CI::TextureDescriptor*)
71.72 KB 0.0% 1380 CI::prepare_initial_graph(CI::Context*, char const*, CI::Image*, CI::RenderDestination const*, CGRect, CGColorSpace*, CI::PixelFormat, CI::swizzle_info, CI::Affine const&, bool, CI::TextureDescriptor*)
18.34 KB 0.0% 202 -[CIPaperWash outputImage]
