This is really fast :)
time find . -name \*.c | xargs wc -l | tail -1 | awk '{print $1}'
204753
real 0m0.191s
user 0m0.068s
sys 0m0.116s
Show Sample Output
Have wc work on each file then add up the total with awk; get a 43% speed increase on RHEL over using "-exec cat|wc -l" and a 67% increase on my Ubuntu laptop (this is with 10MB of data in 767 files).
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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find . -type f -name "*.c" -exec cat {} + | grep -Evc '^[:space:]*$'
This will also be faster due changing \; to +.