How does eu_unstrip restore symbols

[Fr3v1]

Hi there, I want to get the function names and addresses of a large amount
of stripped binaries of Linux packages. The present approach is to restore
symbol names by using 'eu_unstrip' and the .debug file within the
corresponding .ddeb file.
So here are my two questions: 1. Is there another way to get the function
names and their addresses? 2. How does eu_unstirp work, does it really make
stripped one 'unstrip'? Will it occur to some kind of precision error 3.
How fast is it for like 10 million tiny binaries?

Best wishes