0Sperimentazione di nuovi strumenti di compressione immagine

I’ve been using EWWW image optim­iser to com­press all of my JPEG e PNG images on this site for sev­er­al years. EWWW makes use of OptiPng and PngOut and whilst these are power­ful tools there are altern­at­ives out there now that I wanted to test and com­pare.


I am aware of new­er image formats that may offer smal­ler sizes but until they are broadly sup­por­ted we will have to con­tin­ue to work with PNG e JPEG.

I have already seen some com­par­is­ons show­ing some impress­ive per­form­ance by some oth­er formats but I wanted to test this for myself with my real­world images. Based on the claims presen­ted I decided to start with Pingo and see how much it reduced the size of my total image lib­rary.

Ci sono 3549 immagini che sono un mix di PNG, JPEG, and Webp files and range in size from over 1000×1000 pixels to small thumb­nails of 60×60 pixels.

lossless

dimensione
Ori­gin­al116Mb (121,848,736 byte)
dopo Pingo113Mb (118,310,160 byte)

3505 images were pro­cessed in 434 seconds which is impress­ively quick com­pared to the pre­vi­ous tools I’ve used. tuttavia, solo 3455kb (3.37mb) è stato salvato, che è un 2.5% sav­ing.

Des­pite the lack of reduc­tion, I will still be look­ing to migrate to pingo as it is vastly faster than the tools used by EWWW and achieves effect­ively the same res­ult

lossy

dimensione
Ori­gin­al116Mb (121,848,736 byte)
dopo Pingo94Mb (98,133,668 byte)

Lossy com­pres­sion was much more impress­ive in size reduc­tion with a 22.6Mb (19%) reduc­tion but this is to be expec­ted as my pre­vi­ous tools were not using lossy com­pres­sion. I had decided in advance that a sig­ni­fic­ant reduc­tion would be needed for me to con­sider using lossy com­pres­sion. This reduc­tion is right on the bor­der­line. The ulti­mate decision comes down to how much the smal­ler dimen­sion (più spesso servito) images saved — the major­ity of the sav­ings were with ori­gin­al images not with the smal­ler images so I’m not per­suaded that the reduc­tion is worth­while at this point, espe­cially as I already serve webp images to over 50% of vis­it­ors and these gained the least

The next step is to fig­ure out how to auto­mate the pro­cess with pingo which isn’t sup­por­ted by EWWW.

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