Raptor Lake + 5080: 380.63 GB/s
Raptor Lake (CPU for reference): 20.41 GB/s
GB10 (DGX Spark): 116.14 GB/s
GH200: 1697.39 GB/s
This is a "eh, it works" benchmarks, but should give you a feel for the relative performance of the different systems. ./yt-dlp --skip-download --write-sub --write-auto-sub --sub-lang en --sub-format json3 <youtube video URL>
You can also feed the same command a playlist or channel URL and it'll run through and grab all the transcripts for each video in the playlist or channel.
Writing generally involves reading to an in-memory database, making whatever changes you want, then something like