Show Meta Value when querying meta key

Hi guys i am trying to create slider for my website. where some of my posts have a custom field called “$slideurl” which contains the direct url to the image for the slider.

what is the best way i can query for posts that have that custom field and display that value ?

At the moment i have : –

<?php
$args = array(
‘meta_key’=>’$slideurl’, );

query_posts($args): if (have_posts()) : while (have_posts()) : the_post();

//i want to show that meta value for ‘$slideurl’

endwhile; endif; ?>

I know i can use this : –

get_post_meta($post->ID,’$slideurl’ , true);

But this takes at least 10 seconds to load the images on my webpage.
what is the best way to go about this? does anyone recommend any alternatives?