Nothing
memory usage can be excessive in Windows
sparsepp has a very simple default allocator based on the system malloc/realloc/free implementation, and the default Windows realloc() appears to fragment the memory, causing significantly higher memory usage than on linux. To solve this issue, I am working on a new allocator which will remedy the problem.
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.