compact: group concurrency improvements#1029

Merged

bwplotka merged 3 commits intothanos-io:masterfrom

mjd95:group-concurrency-improvements

Apr 17, 2019

Commits on Apr 16, 2019

group concurrency improvements
Martin Dickson
committed
remove unnecessary error check
Martin Dickson
committed

Commits on Apr 17, 2019

add to wg in main goroutine
Martin Dickson
committed