CoreFilters Not Resolving Many Critical Issues

[Kenaz Chan]

Hi,

I've installed mod_pagespeed with default CoreFilters on my server (WordPress multisite server). However, mod_pagespeed does not improve much on my PageSpeed Insight's ranking. Most of the reported issue should be fixed by mod_pagespeed CoreFilters, but doesn't work as expected. Below are few of the domains from the same server, which are facing similar issues:

• [51 pts] https://energycorridortso.ecpro.net/?ModPagespeed=off
• [54 pts] https://energycorridortso.ecpro.net/
• Not able to eliminate render-blocking JS/CSS, including JS/CSS created by mod_pagespeed
• Not able to set resource expiry, even some are from same domain
• Not able to optimize images
• [53 pts] https://fortworthtso.ecpro.net/?ModPagespeed=off
• [54 pts] https://fortworthtso.ecpro.net/
• Not able to eliminate render-blocking JS/CSS, including JS/CSS created by mod_pagespeed
• Not able to set resource expiry, even some are from same domain
• Not able to optimize images
• [62 pts] https://tsobaytown.ecpro.net/?ModPagespeed=off
• [64 pts] https://tsobaytown.ecpro.net/
• Not able to eliminate render-blocking JS/CSS, including JS/CSS created by mod_pagespeed
• Not able to set resource expiry, even some are from same domain
• [89 pts] https://ecpro.net/?ModPagespeed=off
  
• [91 pts] https://ecpro.net/
• Not able to eliminate render-blocking JS/CSS, including JS/CSS created by mod_pagespeed

Below are some detail of my server environment:

• Server setup with Nginx as reverse proxy and Apache as backend host
• WordPress multisite
• Installed mod_pagespeed on Apache with version 1.11.33
• Retain pagespeed.conf with default settings

I've went though the FAQ section here, but seems like doesn't apply to my case. I've also tried to modify many other configurations but nothing help much. Hope to get some guidance from this group. Attached are my Nginx virtual host, Apache virtual host and htaccess. All domain/site are using same format of virtual host.

Thanks.

[Otto van der Schaaf]

Hi,

For the complaints about render blocking js and css, you could consider enabling defer_javascript and prioritize_critical_css to see how that works out.

See https://modpagespeed.com/doc/filter-js-defer and https://modpagespeed.com/doc/filter-prioritize-critical-css

(The docs also describe risks associated to enabling these filters)

Some of the images in the first site you mentioned are injected via javascript. As mod_pagespeed does not interpret javascript, these images can only be optimized in-place, without changing the urls that reference them). That means that some optimizations cannot be applied to them.

One thing that may help here is enabling browser-specific in-place optimization:

https://modpagespeed.com/doc/system#in_place_optimize_for_browser

It may also be worth it to take a look at what the debug filter logs in html comments (one way to enable it is by adding ?PageSpeedFilters=+debug to the querystring of a page) to see if there are any useful messages written in html comments.

Otto

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[Kenaz Chan]

Hi Otto,

Thanks for your fast respond on blocking script and image optimization. However, do you know if there is a way to enforce mod_pagespeed to set resource expiry? Most of my sites mentioned earlier got this problem, and seems like CoreFilters extend_cache should be doing this but not working as expected.

Regarding render blocking js/css, I've tried setting defer_javascript and prioritize_critical_css. It doesn't increase the point and defer_javascript even causing new error. I'll try browser-specific in-place optimization later.

Thanks. :)

-Kenaz

[Jan-Willem Maessen]

On Sat, Apr 29, 2017 at 10:30 AM, Otto van der Schaaf <osc...@we-amp.com> wrote:

Hi,

For the complaints about render blocking js and css, you could consider enabling defer_javascript and prioritize_critical_css to see how that works out.

See https://modpagespeed.com/doc/filter-js-defer and https://modpagespeed.com/doc/filter-prioritize-critical-css

(The docs also describe risks associated to enabling these filters)

Some of the images in the first site you mentioned are injected via javascript.

This caught my eye.  It's likely you'll be dinged for render-blocking JavaScript simply because of the images being loaded via JS.

-Jan

 

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[Kenaz Chan]

Hi Jan/Otto,

I am able to fix most image optimisation and expiry issues with mod_pagespeed now. However, the render-blocking issue still persists and I am not sure if it is due to image loaded via JS. For example one of the site below:

[65 pts] https://www.theyvc.com/?ModPagespeed=off

[59 pts] https://www.theyvc.com/

Without mod_pagespeed, there are only some render-blocking CSS & image optimisation issues. However, with mod_pagespeed enabled, it creates a new bunch of render-blocking JS files.

-Kenaz