[melky]

еще парочку подкину идей для сжатия кода.

jQuery.fn.correctLines = function( maxLine, moreText ) {

		var self = this[ 0 ], temp, classes, i, lineHeight, 
*!*
               $ = jQuery;
*/!*

.....

lineHeight.toString().indexOf("px") > 0

~(lineHeight+'').indexOf("px")

....

clone.html('');
jQuery( document.body ).append( clone );

jQuery( document.body ).append(  clone.empty() );

....

for( i = 0; i < txt.length; i++ ) {

			clone[0].innerHTML += txt[ i ] + ' ';

			if ( clone[0].offsetHeight > lastHeight ) {
				if ( lastHeight == 0 ) {
					height = clone[0].offsetHeight;
				}
				startWord = endWord + 1;
				endWord = i - 1;
				lines++;
				lastHeight = clone[0].offsetHeight;
			}

			if ( lines > maxLine ) {
				break;
			}
		}

jQuery.each :

We can break the $.each() loop at a particular iteration by making the callback function return false. Returning non-false is the same as a continue statement in a for loop; it will skip immediately to the next iteration.

$.each(txt, function(i, a) {

    clone[0].innerHTML += a + ' ';

    if (clone[0].offsetHeight > lastHeight) {

        if (lastHeight == 0) {
            height = clone[0].offsetHeight;
        }

        startWord = endWord + 1;
        endWord = i - 1;
        lastHeight = clone[0].offsetHeight;
    }

    if ( ++lines > maxLine) return false;
});

...

this.css({
*!*
    height: lines > maxLine ? (lineHeight * maxLine) + "px" *!*: "auto"*/!*,
*/!*
    overflowY: 'hidden'
});

?????

.....

for( i = startWord; i <= endWord; i++ ) {
			part.push( txt[ i ] );
		}

		for( i = part.length - 1; i >= 0; i-- ) {

			clone.html( part.join(' ') + moreText );

			if ( clone[0].offsetHeight > height ) {
				part.splice( i, 1 );
				endWord--;
			} else {
				break;
			}
		}

не удумал, как заменить, но повторябщиеся операции всегда надо заменять