bp_activity_get_excerpt_length()

function bp_activity_get_excerpt_length() {
	/**
	 * Filters the excerpt length for the activity excerpt.
	 *
	 * @since BuddyPress 1.5.0
	 *
	 * @param int Character length for activity excerpts.
	 */
	return (int) apply_filters( 'bp_activity_excerpt_length', 358 );
}