Incremental filerevving?

I wonder if it would be possible to extend filerev to allow for incremental changes - that is, if a single file has changed update the revving for that file rather than having to filerev all files all over again? At the moment this doesn't seem to be doable, which makes 'watch' take significantly longer than perhaps necessary...

[eddiemonge]

you probably shouldnt be revving on watch anyway. and try it in combination with grunt-newer

Not sure how that combo would work - but have to admit we've moved to Gulp, which resulted in much shorter processing times in our case (YMMV).