I was thinking of implementing this hybrid. There is a webp middleware that 
actually figures out if the browser supports it or not and delivers a converted 
image accordingly. That’d actually work - but is there such a middleware for 
BPG?
> Am 15.01.2015 um 21:39 schrieb Ryan Schmidt <[email protected]>:
> 
> 
> On Jan 15, 2015, at 1:02 AM, Ryan Schmidt wrote:
> 
>> optipng and pngcrush are popular programs for minimizing the size of pngs.
> 
> Also, consider whether using a different image format would help. png and 
> jpeg are somewhat old formats by now. Newer formats include webp and bpg:
> 
> https://developers.google.com/speed/webp/
> 
> http://bellard.org/bpg/
> 
> Browser support for these formats isn't as good as png and jpeg, but if you 
> can serve webp or bpg images to those users whose browsers support them, and 
> fall back to png or jpeg when needed, that can still help you reduce your 
> bandwidth and make your site faster for some users, and it will get better 
> over time as more users upgrade to newer browsers.
> 
> 
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