Optimized save_vlen
Optimized save_vlen


Former-commit-id: be59b6e5a3079d060cff13bfdd23812cc941765d [formerly dccdeff2397a2dbcbfb4c7df0ae904427e8b5ab7]
Former-commit-id: d48f3967e2f86595905d40a6c9c1b17103a43566
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine