wp-cli/wp-cli — pull request #662 by scribu (2013-08-16 00:11:53+00:00)
Title: Make --format=csv stream output

Unlike `--format=table` and `--format=json`, you can immediately start writing CSV lines, without going through the entire list first.

This would make `wp site list --format=csv` potentially work on huge multisite networks, even wordpress.com.