zachstronaut · October 6, 2012 01:34 · Oct 6, 2012
diff --git a/gistfile1.php b/gistfile1.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * Am I missing something obvious?  Is there some flag for caching attachments or something?
+ *
+ * My actual use case is pulling all the posts from a custom post type... but the behavior is the same with good old plain posts, too.
+ * Your test posts will need Featured Images.
+ */
+
+/**
+ * Use one or the other PHP block in this gist... not both.
+ * Place this in any theme template file between the get_header/get_footer
+ */
+
+$args = array(
+    'post_type' => array('post'),
+    'post_per_page' => -1,
+    'posts_per_archive_page' => -1,
+    'nopaging' => true
+);
+
+query_posts($args);
+
+while (have_posts()) : the_post();
+
+    // Number of MySQL queries is fixed, regardless of number of posts
+    // (Measured with Debug Objects plugin)
+	?>
+
+	<p><?php the_post_thumbnail(); ?></p>
+
+	<?php
+endwhile;
+
+wp_reset_query();
+
+?>
+
+
+
+<?php
+
+/**
+ * Use one or the other PHP block in this gist... not both.
+ * Place this in any theme template file between the get_header/get_footer
+ */
+
+$args = array(
+    'post_type' => 'post',
+    'post_per_page' => -1,
+    'posts_per_archive_page' => -1,
+    'nopaging' => true
+);
+
+$posts = get_posts($args);
+
+// Can do it this way too with same behavior
+//$query = new WP_Query($args);
+//$posts = $query->posts;
+
+foreach ($posts as $post) {
+
+    // get_the_post_thumbnail() here results in 3 MySQL queries PER POST!!
+    // (Measured with Debug Objects plugin)
+	?>
+
+	<p><?= get_the_post_thumbnail($post->ID); ?></p>
+
+	<?php
+}
+
+?>