Expensive page load

The fact that your results differ from mine (I ran the same profiler on a site of mine) suggests that the results you see are due to a server or site config issue. I’m surprised that the other spikes you see are so high. A good load time is less than 1 second. Your caching plugin causes increased load of > 2 seconds; it is designed to decrease load time.
I’d be interested in a full result of the profiler though. Can you link to the spreadsheet of this profile run?

I think this is the full report. I disabled the cache plugin and ran the test again, the FAQ plugin still costs a significant amount of time compared to all other plugins.

WordPress Plugin Profile Report
===========================================
Report date: April 21, 2014
Theme name: Divi
Pages browsed: 1
Avg. load time: 3.2926 sec
Number of plugins: 22
Plugin impact: 76.06% of load time
Avg. plugin time: 2.5044 sec
Avg. core time: 0.5088 sec
Avg. theme time: 0.1205 sec
Avg. mem usage: 49.75 MB
Avg. ticks: 25,179
Avg. db queries : 53.00
Margin of error : 0.1589 sec

Plugin list:
===========================================
P3 (Plugin Performance Profiler) – 0.0078 sec – 0.31%
iThemes Security – 0.1665 sec – 6.65%
W3 Total Cache – 0.0135 sec – 0.54%
Jetpack by WordPress.com – 0.8396 sec – 33.52%
Media Tools – 0.0035 sec – 0.14%
Regenerate Thumbnails – 0.0056 sec – 0.22%
Woocommerce Amazon S3 Storage – 0.0202 sec – 0.81%
Woocommerce Bundle Style Coupons – 0.0010 sec – 0.04%
WooCommerce Coupon Shortcodes – 0.0113 sec – 0.45%
Woocommerce Menu Bar Cart – 0.0109 sec – 0.44%
Woocommerce New Product Badge – 0.0048 sec – 0.19%
Woocommerce Oscommerce Import – 0.0029 sec – 0.12%
Woocommerce Product Archive Customiser – 0.0108 sec – 0.43%
Woocommerce Product Details Customiser – 0.0045 sec – 0.18%
Woocommerce Product Faqs – 0.9458 sec – 37.76%
WooCommerce Product Vendors – 0.0249 sec – 0.99%
WooCommerce Smart Sale Badge – 0.0048 sec – 0.19%
WooCommerce – 0.2897 sec – 11.57%
WooDojo – 0.0347 sec – 1.39%
WooSidebars – 0.0112 sec – 0.45%
WooThemes Helper – 0.0366 sec – 1.46%
Worker – 0.0537 sec – 2.15%

What page did you run this scan on? I noticed you did a one-page scan, not an automatic scan.

It ran on the front page of the site ( where there are no FAQs ) https://vamp3d.com

I watched this scan, it loaded the front page, a product page, the WP-admin dashboard, and the posts overview page.

WordPress Plugin Profile Report
===========================================
Report date: April 21, 2014
Theme name: Divi
Pages browsed: 4
Avg. load time: 3.3411 sec
Number of plugins: 22
Plugin impact: 75.03% of load time
Avg. plugin time: 2.5069 sec
Avg. core time: 0.5432 sec
Avg. theme time: 0.1280 sec
Avg. mem usage: 49.75 MB
Avg. ticks: 25,179
Avg. db queries : 53.00
Margin of error : 0.1631 sec

Plugin list:
===========================================
P3 (Plugin Performance Profiler) – 0.0081 sec – 0.32%
iThemes Security – 0.1700 sec – 6.78%
W3 Total Cache – 0.0147 sec – 0.59%
Jetpack by WordPress.com – 0.8312 sec – 33.16%
Media Tools – 0.0038 sec – 0.15%
Regenerate Thumbnails – 0.0058 sec – 0.23%
Woocommerce Amazon S3 Storage – 0.0200 sec – 0.80%
Woocommerce Bundle Style Coupons – 0.0010 sec – 0.04%
WooCommerce Coupon Shortcodes – 0.0118 sec – 0.47%
Woocommerce Menu Bar Cart – 0.0123 sec – 0.49%
Woocommerce New Product Badge – 0.0048 sec – 0.19%
Woocommerce Oscommerce Import – 0.0029 sec – 0.11%
Woocommerce Product Archive Customiser – 0.0102 sec – 0.41%
Woocommerce Product Details Customiser – 0.0045 sec – 0.18%
Woocommerce Product Faqs – 0.9522 sec – 37.98%
WooCommerce Product Vendors – 0.0250 sec – 1.00%
WooCommerce Smart Sale Badge – 0.0048 sec – 0.19%
WooCommerce – 0.2825 sec – 11.27%

I installed/activated all of the plugins you listed, and still got different results – my page load time is 0.5s, with this plugin only causing 0.04s load. I recommend running your site through https://tools.pingdom.com/.

You can look at the source code of the front page (and any other non-product page for that matter) and notice that no assets whatsoever are loaded from this plugin.

Let me know what you find out from running a page load test; in the meantime I will see what I can do from my end.

page analysis:
https://www.dropbox.com/s/zc7i13571x8s7xr/Screenshot%202014-04-21%2008.08.38.png

performance grade:
https://www.dropbox.com/s/x545vjfof496y04/Screenshot%202014-04-21%2008.08.55.png

cache validator count is up there due to the amount of images being mirrored with jetpack I assume.

No idea how to improve the CSS and javascript performance considering this is WP and its all plugin files.

That report shows that almost 85% of your load time is due to assets – split between scripts, images, css, and html. Again, as I noted above, this plugin loads no assets unless it is on a product page.

One very important thing to note when using the P3 profiler is that it does not immediately differentiate front end load time vs wp-admin load time. When it reports page load time, it inaccurately gives an estimate based on the average of both front-end and wp-admin, which is not relevant when you’re trying to determine page load time for visitors (which I assume is your goal).
A good way to view the difference is to go to the “Detailed Timeline” tab – /wp-admin/tools.php?page=p3-profiler&p3_action=current-scan#p3-tabs-6

This will show you not only the load time on a graph per plugin, but more importantly where the load time occurred. On my scans (I performed ~10), this graph mirrors what I’ve been saying – that this plugin causes no increased load time on the front end of the site, except for on a product page.

Ok so the p3 profiler is misleading me. I assumed it accurately measured the amount of time spent loading a plugin. It made no sense to me that the product FAQ plugin was costing so much load time especially since at this moment, since I have no FAQs loaded. I’m still in development phase here.

The details Timeline looks a little confusing to me.
https://www.dropbox.com/s/x5ys6x6ugu1epay/Screenshot%202014-04-21%2008.31.46.png
Should it be spread out or stacked on top like that?

I will work on the rest of the site, getting it optimized, and see what it says after that.

It should be a line graph, with multiple dots connected by lines.
You may have some javascript issues causing that not to happen.