Live data from Hacker News

Viewing profile — hackthesystem

hackthesystem

HN member
Joined
Mon, Jan 31, 2022, 10:58 PM UTC
HN karma
173
Public activity
30 items

About hackthesystem

Blog: awelm.com Twitter: twitter.com/awelm_ Github: github.com/awelm

Recent public activity

  1. story
  2. story
  3. story
  4. comment
    Comment #31077727

    It's possible to make a compiler backdoor that is "updatable" and therefore a lot less brittle. And yes this does make the backdoor easier to detect since it's now communicating ov…

  5. comment
    Comment #31077689

    Who said it has to "generalize"? No virus generalizes to hack every program. That doesn't mean viruses aren't dangerous. Also OSS makes up most of the modern stack, so access to so…

  6. story
  7. story
  8. story
  9. story
  10. story
  11. story
  12. story
  13. story
  14. comment
    Comment #30186066

    Thanks for mentioning, I just updated my website and Github to use the new WAT functions.

  15. comment
    Comment #30185319

    I actually tried comparing 128-bit SIMD to the 64-bit performance and the difference was 2x. I only published the results for the 4x comparison, but it should be pretty easy to rep…

  16. comment
    Comment #30183923

    Thanks! Good points, I think in general the fixed-width "packed" SIMD ISAs have the downsides that you mentioned. But it seems that WebAssembly doesn't have length-agnostic SIMD in…

  17. story
  18. comment
    Comment #30170667

    Great questions! I'm not a database expert either but I can try answering these: 1) I think databases like to manage pages directly because the db can make more optimizations than …

  19. comment
    Comment #30165867

    Good point. I just removed my name from the license, but I couldn't find the original author(s) so the copyright name list is just empty now

  20. comment
    Comment #30165304

    There is also BusTub from CMU which I stumbled upon earlier today: https://github.com/cmu-db/bustub

  21. comment
    Comment #30165201

    Yeah, I think its a shame that most teachers don't give assignments like this that tie the big picture together with the low-level details. After students complete a big assignment…

  22. comment
    Comment #30164862

    When I was implementing SimpleDB in 2019, I believe CMU's course didn't have resources and lab assignments that were publicly available. Now CMU has published a full video lecture …

  23. comment
    Comment #30159425

    Thanks! I'd also like to see a MVCC implementation because that would shed some light on how mysql works. I'll add MVCC to the future improvements section

  24. comment
    Comment #30159352

    Thanks, really glad to hear that!

  25. comment
    Comment #30159345

    Ah yes, by the time I realized this it was too late to rename unfortunately. And very neat how Amazon SimpleDB is written in Erlang!