eBay's tsv-utils author here. A fair bit of performance benchmarking was done on the tools with the goal of exploring this type of use (data crunching). D did really well (tsv-utils are fast!). There's more info on the benchmarks page in the github repo. Perhaps the best summary is the slides from a talk I did at 2018 DConf. Links:

- tsv-utils repo: https://github.com/eBay/tsv-utils

- Performance studies: https://github.com/eBay/tsv-utils/blob/master/docs/Performan...

- Talk slides: https://github.com/eBay/tsv-utils/blob/master/docs/dconf2018...