To support my case I did a different benchmakr: Export 7 Canon 6D Raw to JPG and measure the full time it takes with the "time" command.
Result: DT 2.2.1 from debian testing repo: 1m25s DT 2.2.1 self-combiled from debian testing source: 1m6s DT 2.2.3 self-compiled source from DT homepage: 1m2s Matthias
