org-edit-src-auto-save-idle-delay

org-edit-src-auto-save-idle-delay is a variable defined in `org-src.el'.
Its value is

0

Documentation:
Delay before saving a source code buffer back into its base buffer.
When a positive integer N, save after N seconds of idle time.
When 0 (the default), don't auto-save.

If you want to save the source code buffer itself, don't use this.
Check `org-edit-src-turn-on-auto-save' instead.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.