I took the WikiPedia logo images from Imgur and used grayscaling, optimized export settings and pngcrush on both of them to reduce their file size by more than 50% without visible loss of quality. Then I base64'd them and embedded them directly into the stylesheet file (increasing image file size by 33%). So in total this PR reduces image file size by about 35% while preventing each WikiPedia page from loading an image from Imgur (external cloud service – since this elimits HTTPS requests as well the total saving are likely a lot larger than 35%).
I took the WikiPedia logo images from Imgur and used grayscaling, optimized export settings and
pngcrushon both of them to reduce their file size by more than 50% without visible loss of quality. Then I base64'd them and embedded them directly into the stylesheet file (increasing image file size by 33%). So in total this PR reduces image file size by about 35% while preventing each WikiPedia page from loading an image from Imgur (external cloud service – since this elimits HTTPS requests as well the total saving are likely a lot larger than 35%).