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jbert

HN member
Joined
Tue, Feb 20, 2007, 8:26 AM UTC
HN karma
1,244
Public activity
509 items

About jbert

Please feel free to email me. My email address has local part: john.berthels

And is hosted at the popular gmail domain used by COMpanies.

Recent public activity

  1. comment
    Comment #13016142

    One difference is in "dead connection detection". How do you know that your AMQP connection is down? At some level you're polling, whether that be TCP keepalive, application keepal…

  2. comment
    Comment #11902267

    The setup process for our Cocoon home security device ( https://cocoon.life ) uses an audio transfer from the phone to pass wifi details and a token to bootstrap setup and a trust …

  3. comment
    Comment #11057142

    Isn't the calculation (assuming (for simplicity) one CPU, running at 100% only on application load) 60 requests/sec => each request takes 1/60s CPU-second == 16.6ms of CPU time to …

  4. comment
    Comment #10709401

    I disagree. Names are comments. You don't want more mutable state across large scopes, but using intermediate names can help comprehension.

  5. comment
    Comment #10707119

    > your business plan must make sense to the investors. Would locking in dividends in the business plan allow the investors to become "directly involved" and make investment in a "g…

  6. comment
    Comment #10676150

    > And with language support I don't have to introduce new names for each occurrence; Having as a name is only useful I think if you don't want to give it another name? I was asking…

  7. comment
    Comment #10673041

    Is there a significant benefit to this over using a new name for the result? y = (x + 1) / atan(x) - x; x = y; // If you're in a loop and updating some value If would hope/imagine …

  8. comment
    Comment #10214685

    Is the "but at that kind of energy output we'll boil the planet" limiting case really a hard limit though? If we're at the stage of having super-dense energy sources and super-tech…

  9. comment
    Comment #9846782

    In the pre-smtp days, email links were over UUCP, which was often relayed via dial up lines which connected intermittently, on a schedule (e.g. every hour). You also specified not …

  10. comment
    Comment #9831781

    > The founders of the USA were not immigrants, they didn't immigrate to join Indian tribes, they were founders of a country. Sorry, I'm afraid I don't understand the distinction yo…

  11. comment
    Comment #9795438

    Thanks - useful point. But, I think that's more of an oddity of nested, named subs than anything else. The usual anonymous subs close as you'd expect (as you say).

  12. comment
    Comment #9789622

    I'm interested in the details of the variable scoping problems are. I'd have thought that perl's explicit declaration of lexicals with 'my' was better than "declare at first use" o…

  13. comment
    Comment #9776423

    Does this places a reasonable selection pressure on the kinds of flying insects we can have? Big enough to shrug off a raindrop hit, or small enough to surf along the surface tensi…

  14. comment
    Comment #9692220

    Does it have to be an open system? Can't the already-contaminated water be used for cooling in a mostly-closed system? And if the expansion due to rainwater is significant, perhaps…

  15. comment
    Comment #9686514

    Someone did a nice calculator hack a little while back, based upon an old reddit comment of mine: http://tlrobinson.net/blog/2007/12/presenting-gccalc-a-horri... http://www.reddit.…

  16. comment
    Comment #9665547

    A related one which I found is A + B - B != A In pretty much the same case, where A==some time and B == 1 month This came up in calculations for monthly subscriptions, trying to re…

  17. comment
    Comment #9595820

    Not entirely unlike running a garbage collection cycle (or freeing a pool) after each HTTP request...

  18. comment
    Comment #9532144

    Yes, but as long as the same method is used to generate the hash, the same browser could connect to multiple services and share the same content. In that sense there needn't be a s…

  19. comment
    Comment #9376993

    Perhaps stretch out a flow battery with a pair of pipelines? http://en.wikipedia.org/wiki/Flow_battery We could repurpose those oil pipelines we no longer need. :-)

  20. comment
    Comment #9370708

    Is there any way to use drag to decay the orbit? We don't have to reach the sun quickly . The solar wind is blowing past, is it possible to "sail" against that at an angle and - ov…

  21. comment
    Comment #9306657

    Huh - the other domains in *.google are hitting a default page. Perhaps the most-robustly-hosted apache default page in the world? http://foo.google/ http://wewjfkenf.google/

  22. comment
    Comment #9185308

    People want to try on several pairs of glasses and see which ones they look best in. So if you control the retail chain, you've got the monopoly. They said their competition was wa…

  23. comment
    Comment #8965167

    Do you know if there is any bias to the orientation of the jets? e.g. in a spiral galaxy, do they tend to align with the axis of rotation and so do less damage locally (spray out "…

  24. comment
    Comment #8942674

    You said: "In other words, it's just wouldn't be practically possible to create an application that uses standard memory allocation functions and reliably can free some memory back…

  25. comment
    Comment #8935376

    > You're right, though; metadata on the allocations themselves marking them as release-on-memory-pressure would be much better. http://man7.org/linux/man-pages/man2/madvise.2.html …