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HowTo: ultra mega fast rails routes lookup

I was quite annoyed by the wasted time it took each time I grep the rails routes table.
Wait, can’t this be cached? - Sure it can!
So I came up this nice little alias to cache the output once:
` alias route=’CF=tmp/routes_cache; [[! -s $CF]] && rake routes > $CF; cat $CF | grep ‘ `

now it’s ultra fast, try e.g.:
` $ route root `