Optimize select expression registration phase#1445

Merged

qwwdfsad merged 5 commits intodevelopfrom

Aug 22, 2019

Commits on Aug 20, 2019

Optimize select expression registration phase
elizarov
committed

Commits on Aug 21, 2019

Fixed unlimited channel select onSend on closed channel
elizarov
committed

Commits on Aug 22, 2019