Multiple Loops for each Category, More Efficient Way to Query Categories?

I’ve got a page I’m showing multiple categories on, with each category displaying their respective posts. I’m thinking there’s got to be a more efficient way of running through every category, rather than just running a loop x number of times. For example:

<?php $one_query = new WP_Query( 'category_name=one' ); ?>
<?php while ($one_query -> have_posts()) : $one_query -> the_post(); ?>
<!-- stuff -->
<?php endwhile;?>
<?php rewind_posts(); ?>
<?php $two_query = new WP_Query( 'category_name=two' ); ?>
<?php while ($two_query -> have_posts()) : $two_query -> the_post(); ?>
<!-- stuff -->
<?php endwhile;?>
<?php rewind_posts(); ?>
.
.
.

So say I have 10 categories, is just running 10 loops for each category the only way? TYIA.