package com.google.refine.importers.tree;

import java.util.LinkedList;
import java.util.List;

import com.google.refine.model.Cell;

/**
 * A record describes a data element in a tree-structure
 *
 */
public class ImportRecord {
    public List<List<Cell>> rows = new LinkedList<List<Cell>>();
}
package com.google.refine.importers.tree;

import java.util.ArrayList;
import java.util.List;

import com.google.refine.model.Cell;

/**
 * A record describes a data element in a tree-structure
 *
 */
public class ImportRecord {
    public List<List<Cell>> rows = new ArrayList<List<Cell>>();
}
Switch from LinkedList to ArrayList
Switch from LinkedList to ArrayList

Just a simple list.  No need for extra overhead..
