@u235bomb: "Are some graphics programs better than others for compressing JPEG?
A friend swears that Image Ready is the best for getting the
smallest file with same quality.
I presume there are different numerical routines used by
different companies in their software, but I would guess
maybe 5% variation in file jillmartin@example.com.
Has anybody done a comparison of different programs to see
who offers the best compression?"
    @u235bomb: "<quote>
I suppose quality is a subjective thing; I consider it to be a lack of
compression artefacts, such as the edge effects, or seeing zones
of the background posterised by quantising the colour."
{'source': 'USENET', 'other_information': '{"reply_count": 1, "forum_name": "alt.comp.compression.20140312.mbox"}', 'file': 'data/output/usenet-alt.comp.parquet'}