sed – combine two replace command into one line

I have below two line command to replace in files under current directory.
I would like to combine it to one line command to improve performance.

find . -type f -name '*' | xargs sed -i 's/hello_release_demo/hello_demo/g'
find . -type f -name '*' | xargs sed -i 's/hello_debug_demo/hello_demo/g'

How should I use one sed command to handle two similar replace?

>Solution :

You can use an extended regular expression, with the -E option:

sed -E -i 's/hello_(release|debug)_demo/hello_demo/g'