1BRC in GNU datamash

[barslmn]

I took 45m9.592s in google collab.

real	45m9.592s
user	50m42.326s
sys	2m23.052s

datamash \
  --skip-comments \
  --sort \
  --field-separator ";" \
  --round 1 \
  --group 1 min 2 mean 2 max 2 < measurements.txt | sed ':a;N;$!ba;s/\n/, /g' |
  sed 's/;/=/; s/;/\//g' |
  sed '1s/^/{/; $s/$/}/'

Baseline took:

real	9m27.433s
user	8m3.587s
sys	0m25.914s

TODO to myself: run it with GNU parallel

Collab link:
https://colab.research.google.com/drive/1aIRHuF1MPyB2i12rJ_GbsNDV6JRUHrHp?usp=sharing