Radek Hušek authored Dec 10, 2015 and Radek Hušek committed Nov 09, 2017

If group has size 4 and graph contains one of following
subgraphs, it cannot be group-connected:
- vertex with all neighbours of degree 2
- vertex such that 2 of 3 his neighbours has degree 2 and so
  do their neighbours
- edge such that all 4 of her neighbours have degree 2

Radek Hušek authored Dec 10, 2015 and Radek Hušek committed Nov 09, 2017

Producer & workers now wait for consumer so
they don't flood him with data.

Radek Hušek authored Dec 10, 2015 and Radek Hušek committed Nov 09, 2017

Exposes another parameter for fine tuning parmap.

Radek Hušek authored Dec 10, 2015 and Radek Hušek committed Nov 09, 2017

No measurable difference on my laptop :-(