Yet another time to first byte question

[pmeenan]

Can you turn on debugging for the page, object and database caches? I'd expect to see something like this:

Code:

<!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/

Served from: wp.patrickmeenan.com @ 2011-09-12 14:55:29 -->

<!-- W3 Total Cache: Object Cache debug info:
Engine:             apc
Caching:            enabled
Total calls:        800
Cache hits:         799
Cache misses:       1
Total time:         0.0519
W3TC Object Cache info:
    # |     Status      |     Source      | Data size (b) | Query time (s) | ID:Group
    1 |     cached      |   persistent    |             4 |         0.0007 | is_blog_installed:default
    2 |     cached      |   persistent    |           145 |         0.0002 | notoptions:options
    3 |     cached      |   persistent    |         20573 |         0.0004 | alloptions:options
    4 |     cached      |    internal     |           145 |         0.0001 | notoptions:options
    5 |     cached      |    internal     |         20573 |              0 | alloptions:options
...
  800 |     cached      |    internal     |         20573 |              0 | alloptions:options
-->

<!-- W3 Total Cache: Db cache debug info:
Engine:             apc
Total queries:      3
Cached queries:     0
Total query time:   0.0027
SQL info:
    # | Time (s) |    Caching (Reject reason)     |   Status   | Data size (b) | Query
    1 |   0.0016 |  disabled (Query is rejected)  | not cached |             0 | SELECT SQL_CALC_FOUND_ROWS  wp_posts.* FROM wp_posts  WHERE 1=1  AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private')  ORDER BY wp_posts.post_date DESC LIMIT 0, 10
    2 |   0.0006 |  disabled (Query is rejected)  | not cached |             0 | SELECT FOUND_ROWS()
    3 |   0.0005 |  disabled (User is logged in)  | not cached |             0 | SELECT comment_approved, COUNT( * ) AS num_comments FROM wp_comments  GROUP BY comment_approved
-->

<!-- W3 Total Cache: Page cache debug info:
Engine:             apc
Cache key:          w3tc_wp.patrickmeenan.com_1_page_6666cd76f96956469e7be39d750cc7d9
Caching:            disabled
Reject reason:      User is logged in
Status:             not cached
Creation Time:      0.418s
Header info:
X-Pingback:         http://wp.patrickmeenan.com/xmlrpc.php
Expires:            Wed, 11 Jan 1984 05:00:00 GMT
Last-Modified:      Mon, 12 Sep 2011 14:55:29 GMT
Cache-Control:      no-cache, must-revalidate, max-age=0
Pragma:             no-cache
Content-Type:       text/html; charset=UTF-8
X-Powered-By:       W3 Total Cache/0.9.2.4
-->

For timthumb, it looks like you might have to edit your template to get it working through a CDN but it's well worth it: http://blog.gingerlime.com/thumbs-up