install/mod_pagespeed_test/slow_flushing_html_response.php - incubator-pagespeed-mod - Git at Google

 <?php
 header('Content-Type: text/html');

 echo "<html><head></head><body>\n";
 $size = 5;

 for($i = 1; $i <= $size; $i++) {
   echo "<p>foo</p><div>bar:" . $i  . "</div>\n";
   ob_flush();
   flush();
   sleep(1);
 }

 echo "</body></html>\n";
	<?php
	header('Content-Type: text/html');

	echo "<html><head></head><body>\n";
	$size = 5;

	for($i = 1; $i <= $size; $i++) {
	echo "<p>foo</p><div>bar:" . $i . "</div>\n";
	ob_flush();
	flush();
	sleep(1);
	}

	echo "</body></html>\n";