Image optimization for PageSpeed analysis

[Adrian Ursu]

Hi guys,

I am trying configure my IIS Speed to handle some image optimizations.

Specifically, I need to convert JPG to lossless and insert image dimensions inline.

I have played with different combinations but I could not do it.

I suppose the filters should be loaded in a specific order.

Here is how my config looks like:

IISpeed FileCachePath C:\iispeed_cache\

IISpeed FileCacheSizeKb 102400

IISpeed FileCacheCleanIntervalMs 36000000

IISpeed FileCacheInodeLimit 500000

pagespeed on

pagespeed RewriteLevel CoreFilters

pagespeed EnableFilters convert_to_webp_lossless,resize_mobile_images

pagespeed EnableFilters sprite_images,lazyload_images,in_place_optimize_for_browser,insert_image_dimensions

pagespeed EnableFilters inline_images

pagespeed EnableFilters recompress_images

pagespeed EnableFilters convert_gif_to_png

pagespeed EnableFilters convert_jpeg_to_progressive

pagespeed EnableFilters recompress_jpeg

pagespeed EnableFilters recompress_png

pagespeed EnableFilters recompress_webp

pagespeed EnableFilters strip_image_color_profile

pagespeed EnableFilters strip_image_meta_data

pagespeed EnableFilters jpeg_subsampling

pagespeed EnableFilters convert_png_to_jpeg

pagespeed EnableFilters resize_images

pagespeed EnableFilters convert_jpeg_to_webp

pagespeed EnableFilters convert_to_webp_lossless

Thank you,

Adrian

[Otto van der Schaaf]

Hi,

The order in which you enable filters has no relation to the order in which they are executed. So that's probably not it.

You can get the module to output debug comments around optimization decisions by enabling the debug filter.

You can also do that by adding ?PageSpeedFilters=+debug on the querystring.

E.g.:  view-source:https://www.modpagespeed.com/examples/resize_rendered_dimensions/image_resize_using_rendered_dimensions.html?PageSpeed=on&PageSpeedFilters=rewrite_images,insert_image_dimensions,debug

Perhaps you need resize_rendered_image_dimensions enabled:

https://www.modpagespeed.com/doc/reference-image-optimize#resize_rendered_image_dimensions

Lastly, the module works with a deadline, so it may take a couple of refreshes to work. For computing the rendered image dimensions,

the module relies on browsers to beacon back dimensions, so you'll need actual page loads for the filter to learn about the page and fully

apply.

Hope that helps!

Kind regards,

Otto van der Schaaf

https://www.linkedin.com/in/oschaaf

We-Amp B.V.

Aalsmeerderweg 14

1432 CR Aalsmeer

The Netherlands

Phone: +31 6 25576077

E-mail: osc...@we-amp.com
Website: www.we-amp.com

[Adrian Ursu]

Hi Otto,

Thank you very much for your suggestions.

I will try the recommendations.

 

Adrian Ursu
Managing Partner

M: + 40 722.247.371
E: adria...@brandfusion.ro

36 Sighisoara St., sector 2, 021936, Bucharest, Romania
T: +4 021 528 02 70
F: +4 021 528 02 69
E: off...@brandfusion.ro
W: www.brandfusion.ro

 

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Kind regards,