Performance Tuning Challenge #6 (wordcount)

This is the recording of a zoom meeting that happened on July 17, 2022.

[douglasmennella]

There’s a straightforward explanation of the vpshufb trick. You’re essentially hashing characters to their bottom nibble in such a way that only whitespace characters hash to themselves. Then when you have conflicts you take those characters which hashed to themselves.

[salesmanproblem]

Could you please explain how you will search in array of unique strings? Or do you mean having a separate hash table with unique strings? But then we need to remove strings from it.

[vova_dev]

Hello! How did you get Top-down analysis and the roofline analysis?

[вседома-фр]

Great video!
For next videos advise to delete repeated words from speech "and, and, and...". A bit annoying to listen them. Want to understand material itself. Sush words take much attention for me as a viewer.
Thank you for sharing such a great knowledge!