speed issue: gsub on large data frame

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Sent from my phone. Please excuse my brevity.

Hi R?lers,

I?m running into speeding issues, performing a bunch of 

?gsub(patternvector, [token],dataframe$text_column)"

on a data frame containing >4millionentries.

(The ?patternvectors? contain up to 500 elements) 

Is there any better/faster way than performing like 20 gsub commands in
a row?


Thanks!
Simon

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