Speed up ndlar viewer#224

diaza wants to merge 2 commits intofeature/lcremone_NDLArTMSdisplayDUNE/ndlar_flow:feature/lcremone_NDLArTMSdisplayfrom

feuture_speedupndlardisplayDUNE/ndlar_flow:feuture_speedupndlardisplayCopy head branch name to clipboard