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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. J Kenneth King‏ @agentultra Oct 21

      J Kenneth King Retweeted Casey Muratori

      Great stream. Original quote is: there are 2 hard problems in CS: naming things, cache invalidation, and off-by-one errors. Most of the stream was about content caching though and not so much about the kind of caches the quote was talking about.https://twitter.com/cmuratori/status/1451268903003250688 …

      J Kenneth King added,

      Casey Muratori @cmuratori
      I will being streaming "Cache Invalidation Isn't Hard" at http://twitch.tv/handmade_hero  shortly. The topic of this lecture will be that cache invalidation isn't hard, and will include discussions on cache invalidation and it's not-being-hard-ness.
      1 reply 0 retweets 4 likes
    2. Casey Muratori‏ @cmuratori Oct 21
      Replying to @agentultra

      One thing we had trouble finding out (and still don't know) is what _is_ the kind of invalidation the quote was talking about. Do you happen to have an original source?

      1 reply 0 retweets 3 likes
    3. J Kenneth King‏ @agentultra Oct 21
      Replying to @cmuratori

      Phil Karton I think. https://www.karlton.org/2017/12/naming-things-hard/ …

      1 reply 0 retweets 1 like
    4. J Kenneth King‏ @agentultra Oct 21
      Replying to @agentultra @cmuratori

      There isn’t a whole lot of context for the quote but given Karlton was at Netscape at the time it was probably talking about shared thread caches or instruction caches maybe.

      1 reply 0 retweets 1 like
    5. Casey Muratori‏ @cmuratori Oct 21
      Replying to @agentultra

      Hmm... so I guess it may be lost to the sands of time, to a certain extent :/

      1 reply 0 retweets 2 likes
    6. Lyle Jantzi III‏ @LyleJantzi Oct 21
      Replying to @cmuratori @agentultra

      I always assumed the quote had to do with invalidating cached website content. Browsers don't know when the content has changed, so how do they know whether they should pull from local cache or from the remote server?

      2 replies 0 retweets 3 likes
      Casey Muratori‏ @cmuratori Oct 21
      Replying to @LyleJantzi @agentultra

      But that's not a real problem. There are only two cases: trivial, where it's a dependent asset, and therefore it is completely solved perfectly by putting the hash of the contents in the resource name; or impossible, where the main contents (eg. the html) can be changed any time.

      6:55 PM - 21 Oct 2021
      • 2 Likes
      • Radoslaw Jurga Lyle Jantzi III
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Casey Muratori‏ @cmuratori Oct 21
          Replying to @cmuratori @LyleJantzi @agentultra

          The second case is unsolvable, ergo the only correct statement would not be that it is "hard". It is in fact "impossible". The best you can do is a statistical guess.

          2 replies 0 retweets 2 likes
        3. Lyle Jantzi III‏ @LyleJantzi Oct 21
          Replying to @cmuratori @agentultra

          Maybe the originator of the quote didn't realize it was impossible? Managing these cache settings is something we do all the time in web development, so it certainly doesn't seem "impossible" even though, yes, it is at best a guess.

          0 replies 0 retweets 1 like
        4. End of conversation

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