WP-Trik: Disable AutoDraft

The simplest solution is to go into your active theme and add this code to your theme’s functions.php file (found in /wp-content/themes/[your-theme-name]/functions.php):
/* Disable AutoSave */
function disableAutoSave() {
wp_deregister_script('autosave');
}
add_action( 'wp_print_scripts', 'disableAutoSave' );


=============================
Here is a similar tactic (from Mark / t31os), also for your theme’s functions.php file:
/* Disable AutoSave, hacky-style */
function hacky_autosave_disabler( $src, $handle ) {
if( 'autosave' != $handle )
return $src;
return '';
}
add_filter( 'script_loader_src', 'hacky_autosave_disabler', 10, 2 );

Mark says the above tactic “simply wipes out the src value for the autosave script, which in

=======================

http://www.plaxee.com/wordpress/how-to-disable-auto-draft

Step 1. Editing /wp-includes/default-filters.php file.
i. Open default-filters.php file.
ii. Find the line item add_action( ‘pre_post_update’, ‘wp_save_post_revision’ );
iii. Comment out this line item with a double slash in front as shown in the image below.