lists vs pure vector vs monadic vector stream performance benchmarks

I tried benchmarking pure lists, pure vectors and monadic vector streams to see how they fare against each other. Surprisingly monadic vector seems to be doing better than the other two. I am puzzled why the pure vector is not as good as monadic version, I guess they both use the same underlying implementation. Are there some inlining issues? Or I am not benchmarking correctly?

The benchmark results [can be seen here](https://github.com/composewell/streaming-benchmarks/blob/master/charts-0). Monadic vector benchmarking code is in [Vector.hs](https://github.com/composewell/streaming-benchmarks/blob/master/Benchmarks/Vector.hs) and the pure vector benchmarking code is in [PureVector.hs](https://github.com/composewell/streaming-benchmarks/blob/master/Benchmarks/VectorPure.hs).