grep - bash How to extract first match from n files efficiently -


i have large number of text files containing timestamped data day. each file day. want extract single line each file same time of day. following works quite slow - there faster way?

for f in ngeneric*.txt ;do egrep -m1 "*t1600*" $f ; done >

just grep should do... 

 grep -m1 "t1600" ngeneric*.txt > output

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