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In the shell, and in UNIX and Linux in general, fork and exec are relatively expensive operations. So:
find . -type f -name nameis more efficient than:
find . -type f | grep nameunless there is...

The -0 option to xargs and both -iname and -print0 primaries in find are extensions to the standards that are not available in several implementations. This is a little harder to write, but is both...

Strange, I get :
$ touch Scooby-Doo-1.txt Himalaya-2.jpg Camping 2009-12-12-33.jpg a-1234.txt
$ find . -type f -regex '.*-[0-9]\{1,3\}\..*'
./2009-12-12-33.jpg
./Himalaya-2.jpg...