On Friday, July 18, 2014 10:05:19 AM UTC-5, j...@cloudflare.com wrote:

> I selected 10,000 random JPEGs that we were caching for customers and ran 
> them through mozjpeg 2.0 via jpegtran. Some interesting facts:

With mozjpeg you probably want to re-encode with cjpeg rather than jpegtran. We 
added support for JPEG input to cjpeg in mozjpeg to make this possible. I'm not 
sure, but I don't think jpegtran takes advantage of much of the work we've done 
to improve compression.

> We will continue to work with mozjpeg 2.0 experimentally with the hope that 
> run time can be brought closer to what we had before as the compression looks 
> good.

We haven't spent as much time as we'd like to on run-time optimization, we've 
really been focused on compression wins. We hope to spend more time on run-time 
performance in the future.
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