glob operator with for loop is stuck - bash

Question

I am trying to traverse all files in /home directory recursively. I want to do some linux command with each file . So, I am making use of for loop as below:
for i in /home/**/*
I have put below statements as start of script as well:
shopt -s globstar
shopt -s nullglob
But its getting stuck in for loop. It might be the problem with handling so many files. If I give some another directory(with less no of files) to for loop loop, then it traverse properly.
What else I can try.
Complete code:
#!/bin/bash
shopt -s globstar
shopt -s nullglob
echo "ggg"
for i in /home/**/*
do
NAME=${i}
echo "It's there." $NAME
if [ -f "$i" ]; then
echo "It's there." $NAME
printf "\n\n"
fi
done

Answer 1

Your code isn't getting stuck. It will just be very, very slow since it needs to build up the list of all files before entering the for loop. The standard alternative is to use find, but you need to be careful about what exactly you want to do. If you want it to behave exactly like your for loop, which means i) ignore hidden files (those whose name starts with .) and ii) follow symlinks, you can do this (assuming GNU find since you are on Linux):
find -L . -type f -not -name '.*' -printf '.\n' | wc -l
That will print a . for each file found, so wc -l will give you the number of files. The -L makes find dereference symlinks and the -not -name '.*' will exclude hidden files.
If you want to iterate over the output and do something to each file, you would need to use this:
find -L . -type f -not -name '.*' -print0 |
while IFS= read -r -d '' file; do
printf -- "FILE: %s\n" "$file"
done

Answer 2

Perhaps this approach may help:
#!/bin/bash
shopt -s globstar
shopt -s nullglob
echo "ggg"
for homedir in /home/*/
do
for i in "$homedir"**
do
NAME=${i}
echo "It's there." "$NAME"
if [ -f "$i" ]; then
echo "It's there." "$NAME"
printf "\n\n"
fi
done
done
Update: Another approach in pure bash might be
#!/bin/bash
shopt -s nullglob
walktree() {
local file
for file in *; do
[[ -L $file ]] && continue
if [[ -f $file ]]; then
# Do something with the file "$PWD/$file"
echo "$PWD/$file"
elif [[ -d $file ]]; then
cd "./$file" || exit
walktree
cd ..
fi
done
}
cd /home || exit
walktree