In the mysqldump docs I see a "--quick" option, however there is no indication as to why somebody would want this disabled. What are the disadvantages to enabling it or why is it even an option? Shouldn't it just be always on?
edit: While it's been made clear to me that it is enabled by default, this isn't too clear the from the official documentation (especially when some samples specify the option: http://dev.mysql.com/doc/refman/5.7/en/copying-databases.html). The table of options does not have a field specifying the defaults and the description of --quick has no note that it's included by --opt. I'll leave the question title as it was so that others looking for the same thing via Google can find the information easily.