Improved queue
Improved queue


Former-commit-id: 30e472421f43f5d0c2b1b87bdca27a83bf30d0ce [formerly 96cd261b979fd4d52c5d5cd7684d913142921c0b]
Former-commit-id: 4fd7fb3e082fa344e4a542c7381a2da2f3af7b30
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine