Fix StreamReader EOF handling and improve perf#69888

Merged

stephentoub merged 3 commits intodotnet:mainfrom GrabYourPitchforks:streamreader

Nov 7, 2022

+363-153

Commits on Nov 5, 2022

Fix StreamReader EOF handling and improve perf

GrabYourPitchforks
authored and
stephentoub
committed
Address PR feedback
stephentoub
committed
Remove erroneous asserts
stephentoub
committed