Speed up the --show command

I crack hashes email:hash
After breaking the hash I use the command -a 0 -m 100 --username  hash2.txt pas.txt --show -o formatted_output.txt --outfile-format 2 original_MD5_hashes.txt
To get the line email:password
But when there are many lines, for example, 1kk (1 000 000), then the command is executed for a very long time.
How can I accelerate the receipt of the file email:password?