Csaba Kiss has published blogpost http://xpagexplorer.org/domino-rest-performance-analysis/ about his findings regarding performance of various REST technologies available on Domino now.
Just a couple of remarks:
- use case for reading 10000 documents at once is probably very far from most real world scenarios
- some may argue ReadViewEntries method is not REST service per se. And it is a core function deep in the HTTP server, probably developed in C. That's something we can't beat I guess
- SmartNSF doesn't (yet?) support reading data from ViewEntries. We are currently discussing if/how to implement it.