Re: Using mps to get a better score at the thinkwithgoogle.com testing site

[Joshua Marantz]

Hi Carl, are you getting FOUC when you enable prioritize_critical_css but leave defer_javascript disabled?

I don't think you should be declaring that the google & twitter domains run mod_pagespeed; you should get a lot of 404s for .pagespeed. resources written on those domains.  If you are trying to eliminate 'leverage browser caching' warnings for those, mod_pagespeeed can robustly improve your score (either by inlining unauthorized resources or by proxying them) but I haven't been suggesting that people do that for those scripts, because in reality the analytics & ads scripts are shared by many sites and likely cached in the browser before they visit yours.  You can increase your PSI score but make your site worse in practice.

There is ongoing work to improve that situation in the ecosystem, mainly around stale-while-revalidate

-Josh

On Thu, Jul 21, 2016 at 7:36 AM, Carl Whalley <carl.w...@gmail.com> wrote:

With https://testmysite.thinkwithgoogle.com I get 99/100 for mobile friendliness, 51/100 mobile speed and 48/100 desktop speed.

The mobile report says I should fix leverage browser caching and eliminate blocking JS and CSS in above fold content. When I enable defer_javascript FOUCs occur on the joomla sites.

I'm sure mps can do those, and have tweaked so much I've lost sight of what the best settings would be. So, I will show where I'm at now and could someone tell me what to change for the better please?

If it works, I'll run the report again and report back.

     ModPagespeedRewriteLevel CoreFilters

    #ModPagespeedEnableFilters prioritize_critical_css

    #ModPagespeedEnableFilters defer_javascript

    ModPagespeedEnableFilters sprite_images

    ModPagespeedEnableFilters convert_png_to_jpeg

    ModPagespeedEnableFilters convert_jpeg_to_webp

    ModPagespeedEnableFilters collapse_whitespace

    ModPagespeedEnableFilters remove_comments

    ModPagespeedEnableFilters extend_cache

    ModPagespeedEnableFilters combine_css

    ModPagespeedEnableFilters combine_javascript

    ModPagespeedEnableFilters flatten_css_imports

    ModPagespeedEnableFilters inline_css

    ModPagespeedEnableFilters inline_javascript

    ModPagespeedEnableFilters rewrite_css

    ModPagespeedEnableFilters rewrite_images

    ModPagespeedEnableFilters rewrite_javascript

    ModPagespeedDomain pbs.twimg.com

    ModPagespeedDomain syndication.twitter.com

    ModPagespeedDomain platform.twitter.com

    ModPagespeedDomain pagead2.googlesyndication.com

    ModPagespeedDomain tpc.googlesyndication.com

    ModPagespeedDomain www.google-analytics.com

    ModPagespeedDomain ads.spreadbuzz.com

    ModPagespeedMaxCombinedJsBytes 256000

   <FilesMatch "\.(html|htm)$">

      Header unset Etag

      Header set Cache-control "max-age=0, no-cache, no-store"

    </FilesMatch>

    <FilesMatch "\.(js|css)$">M

      Header unset Etag

      Header set Cache-control "public, max-age=600"

    </FilesMatch>

   <FilesMatch "\.(jpg|jpeg|gif|png|webp|woff)$">

      Header unset Etag

      Header set Cache-control "public, max-age=600"

    </FilesMatch>       

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