So right now it appears you are trying to do validation and extraction at the same time, since you don't want "case 2" to move down the stream. If your new ReplaceText from this comment is more performant than the one from the original question, you can use RouteOnContent first to exclude the files that do not have the required header and footer. Since there will now be two pattern matching processors, you may find that it is less performant, but it's probably worth a try. Another option is ExecuteScript with a fast scripting language like Groovy or Javascript/Nashorn, but the overhead of the interpreted script might be worse than the improvement of looking only for headers/footers rather than a whole regex.
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