Slow pages with small images

Hello all,
I am using portfolio slidshow plugin for my images. However it takes a while for a page to load:
like in the page above I have a small image but still the page is slow. Any suggestions?
Thanks A lot

here is the php file:

* Template Name: Project Showcase
* Description: A Page Template with Portfolio Slide Show.

get_header(); ?>

<header class="entry-header">
			<h1 class="entry-title"><?php the_title(); ?></h1>

<div class="showbox">
<?php echo do_shortcode('[portfolio_slideshow]'); // ?>
</div><!-- .showbox -->

<div id="primary" class="site-content">
<div id="content" role="main">

<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part( 'content', 'pagecustom' ); ?>
<?php //comments_template( '', true ); ?>
<?php endwhile; // end of the loop. ?>

</div><!-- #content -->
</div><!-- #primary -->

<?php get_sidebar(); ?>

<?php get_footer(); ?>

Hi Mahsa, we’ve moved this to the CMS forum, as it’s more likely to be an issue with WordPress, the plugin, or the hosting account. There are various ways to speed up the loading of your pages, though it’s not really my area. Your images seem well enough optimised to me, and the page loaded pretty quickly for me.