Minify CSS – wp-content/cache/minify/000000/

I have this same question.

Using the Google PageSpeed (PS) Report from the W3TC Dashboard it reads.

Minifying http://domain.com/assets/cache/minify/000000/4de1c/default.include.34733d.css could save 80.4KiB (50% reduction) after compression.

I if I download the optimized files from Goolge PageSpeed and compare the one created by W3 to the Google optimized one they look like this.

/* minify_0c2068f5995fd04a03c72e9559892a4b.css */

/* 1 */ @font-face {
/* 2 */   font-family: 'Open Sans';
/* 3 */   font-style: normal;
/* 4 */   font-weight: 400;
/* 5 */   src: local('Open Sans'), local('OpenSans'), url(https://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf) format('truetype');
/* 6 */ }
/* 7 */ 

/* minify_e980cb6b50645ddc9d24377f2fe05d53.css */

/* 1 */ @font-face {
/* 2 */   font-family: 'Open Sans';
/* 3 */   font-style: normal;
/* 4 */   font-weight: 600;
/* 5 */   src: local('Open Sans Semibold'), local('OpenSans-Semibold'), url(https://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf) format('truetype');
/* 6 */ }
/* 7 */ 

/* minify_fcd77dac8034035042cf3cf9213f7c79.css */

/* 1 */ @font-face {
/* 2 */   font-family: 'Open Sans';
/* 3 */   font-style: normal;
/* 4 */   font-weight: 400;
/* 5 */   src: local('Open Sans'), local('OpenSans'), url(https://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf) format('truetype');
/* 6 */ }
/* 7 */

and the Google one.

@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'), local('OpenSans'), url(https://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf) format('truetype');}
@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'), local('OpenSans-Semibold'), url(https://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf) format('truetype');}
@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'), local('OpenSans'), url(https://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf) format('truetype');}

Is there a setting to minify the minified CSS created by W3?

Interesting side note.

I replaced all the ‘un-minified’ (according to PS) CSS in the default.include.34733d.css with the ‘optimized’ CSS from Google PS and re-ran PS. It still said I needed to Minify the CSS. I then downloaded the new PS optimized CSS and loaded it into Notepad++. Using Compare in NP++, with the 1st PS CSS and the 2nd, the files matched exactly.

@nickzee and @iamtonlythird Try using Autoptimize as a replacement for now. Also please remember to start your own threads.