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paulg's profile
Paul Graham
Paul Graham
Paul Graham
Verified account
@paulg

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Paul GrahamVerified account

@paulg

paulgraham.com
Joined August 2010

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    Paul Graham‏Verified account @paulg 24 Jan 2017

    My father says back in the days of batch jobs it would take about a month to get a program to run, because the debug cycle was 1 day.

    3:56 AM - 24 Jan 2017
    • 17 Retweets
    • 95 Likes
    • Efe Ariaroo ice9 Flavio Gomes Danny Thorpe [LTC] Iyinoluwa Aboyeji Antonis Polemitis AJ Slater Zack Hess priyaank
    14 replies 17 retweets 95 likes
      1. New conversation
      2. Paul Graham‏Verified account @paulg 24 Jan 2017
        Replying to @paulg

        His secretary became an expert at reassembling stacks of punched cards when he dropped them.

        4 replies 1 retweet 39 likes
      3. Ted Herman‏ @tedherman 24 Jan 2017
        Replying to @paulg

        which is why one wrote a word with a magic marker on the side of the deck

        0 replies 0 retweets 4 likes
      4. End of conversation
      1. New conversation
      2. Daniel HB‏ @DanielHoffmann_ 24 Jan 2017
        Replying to @paulg

        what kind of programs did your father made? I wonder what kind of complexity was feasible back then

        1 reply 0 retweets 2 likes
      3. Paul Graham‏Verified account @paulg 24 Jan 2017
        Replying to @DanielHoffmann_

        Physics simulations. I think nearly all the complexity was in the math.

        0 replies 0 retweets 5 likes
      4. End of conversation
      1. New conversation
      2. Hasan M‏ @Hasmanean 24 Jan 2017
        Replying to @paulg

        Before I had a computer, I wrote BASIC programs and gave them to a friend I saw once a week. He would tell me the result next week.

        1 reply 1 retweet 8 likes
      3. Paul Graham‏Verified account @paulg 24 Jan 2017
        Replying to @Hasmanean

        Did he fix your bugs?

        2 replies 0 retweets 0 likes
      4. Hasan M‏ @Hasmanean 24 Jan 2017
        Replying to @paulg

        So I gave him an updated version with some bug fixes I had found...but then he went on vacation and I never got the output. /2

        0 replies 0 retweets 2 likes
      5. End of conversation
      1. Bruce Barnett‏ @grymoire 24 Jan 2017
        Replying to @paulg @SpireSec

        Yup. Critical programs were simulated - by hand and mind - to reduce debug time.

        0 replies 0 retweets 2 likes
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      1. Bruce Hoult‏ @BruceHoult 24 Jan 2017
        Replying to @paulg

        in 1981 I selected my university on the basis they weren't big enough to get a mainframe with punched cards, just a PDP11 with VT52s.

        0 replies 0 retweets 0 likes
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      1. gautam‏ @iunknwn 24 Jan 2017
        Replying to @paulg

        Used to write and debug C code on DMP printer sheets; then use 1 hr of PC time at my dads workplace. Ended up teaching folks there

        0 replies 0 retweets 0 likes
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      1. New conversation
      2. Martin Vindahl Olsen‏ @mvindahl 24 Jan 2017
        Replying to @paulg

        worked at a place where some some employees dated back to age of punch cards. They told of two week dev, two week compile cycles

        1 reply 0 retweets 0 likes
      3. Martin Vindahl Olsen‏ @mvindahl 24 Jan 2017
        Replying to @mvindahl @paulg

        or maybe two week dev, two week test, may have been that

        0 replies 0 retweets 0 likes
      4. End of conversation
      1. cesar penafiel‏ @cesarpenafiel 24 Jan 2017
        Replying to @paulg

        Yeap, and the batch job on a million$ mainframe would take 2 days to produce the output of a $700 portable device today in 10ms

        0 replies 0 retweets 0 likes
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      1.  🚀 Nader Akhnoukh‏ @iamnader 24 Jan 2017
        Replying to @paulg

        even compiling a large production Java app could take 45 minutes in the early 2000's. I was certainly more diligent then.

        0 replies 0 retweets 0 likes
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      1. terrψ  🎃‏ @sandcastler1 24 Jan 2017
        Replying to @paulg

        Remember in grad school: punching cards, taking to control window, waiting for print out, all while staying within assigned budget.

        0 replies 0 retweets 0 likes
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      1. Michael Hoglund‏ @michaelhoglund 24 Jan 2017
        Replying to @paulg

        This is fascinating. How many people worked in that industry back then?

        0 replies 0 retweets 0 likes
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      1. nslindtner‏ @nslindtner 24 Jan 2017
        Replying to @paulg

        still today this is one of the most important metric. Time to fix/debug

        0 replies 0 retweets 0 likes
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      1. Julius Flywheel‏ @JuliusFlywheel 24 Jan 2017
        Replying to @paulg

        before terminals it was coding sheets passed to typists for paper tape or punch card encoding. I cut teeth at the end of the card era

        0 replies 0 retweets 0 likes
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      1. Josh Birdwell‏ @_birdwell 24 Jan 2017
        Replying to @paulg

        I would not have stayed sane. I can not level without debugger tools. Guess you would have to be confident in your code.

        0 replies 0 retweets 0 likes
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