Check out https://news.ycombinator.com/item?id=20161902 https://news.ycombinator.com/item?id=20161902 TL;DR is TF executor parallelism is too pessimistic to fu

Check out https://news.ycombinator.com/item?id=20161902 https://news.ycombinator.com/item?id=20161902 TL;DR is TF executor parallelism is too pessimistic to fully exploit the parallelization opportunities in the problem space. Regent is built on top of Legion which is a cutting edge dataflow library, and is designed to provide the guarantees to achieve that speedup.