I installed a new theme on magento 1.7, and I also had to uninstall GTSpeed, seeing that was breaking the theme. And now I'm getting 1.9 minutes average TTFB time. I don't believe it is because I uninstalled GTSpeed, there is too much difference.

I installed APC and Varnish, but it didn't help. Magento with the old theme (currently live) delivers the first byte in less than 0.6 seconds usually.

Here is the URL to the test slow version:

What could possibly be causing this?

EDIT: It's possibly something to do with the 2columns-left.phtml, when I changed the home page to 1 column the TTFB time went down to 4 seconds.

1 Answer 1


There are too many possibilities as to what could cause the slowness since installing a new theme. Typically, it'll be because of badly written code though.

The best thing I can recommend, is to enable the profiler System > Configuration > Developer > Debug > Profiler as well as the Developer Client Restrictions setting under the Debug panel too. This will show where the bottleneck lies. And from there you can dig deeper and discover why it's so slow.

Furthermore, you should double check your Varnish configuration, by the sounds of it, it isn't working correctly. It should be caching the response from the web server, and giving you much faster speeds.

  • I've enabled the profiler, should I post the output here? is quite big. Apr 7, 2015 at 12:03
  • If you could post it on gist.github.com and post the link that would be helpful. If you can filter out anything from it, please do :)
    – Ash Smith
    Apr 7, 2015 at 12:05
  • I disabled Varnish for now, because it was giving 503 error on the homepage, and it was working on other pages, it helped getting the time down in almost 10 seconds, even knowing that it helps, the server should never take 2 minutes to respond in a normal magento store, so there must be an error somewhere. Apr 7, 2015 at 12:12
  • gist.github.com/hmvar/59864b89c77c3f8f8285 - here is the profiler Apr 7, 2015 at 12:19
  • @HermanoVarussa I can see a few slow template files, take a look at the following files: app/code/design/frontend/sm_g2shop/default/template/sm/supercategories/default_2.phtml (66 seconds), app/code/design/frontend/sm_g2shop/default/template/sm/basicproducts/recomend-home.phtml (42 seconds). I suspect these are loading collections, or doing heavy database queries causing the slowness.
    – Ash Smith
    Apr 8, 2015 at 8:35

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