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Groups > comp.lang.java.programmer > #34960
| From | Eric Sosman <esosman@comcast-dot-net.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: So I did "FizzBuzz", in Java! |
| Date | 2016-07-18 17:30 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <nmjhqe$jj6$1@dont-email.me> (permalink) |
| References | <FizzBuzz-20160717163715@ram.dialup.fu-berlin.de> <nmj00i$jae$1@dont-email.me> <1933e39b-6363-4174-8392-602415a61799@googlegroups.com> <nmj61j$95o$1@dont-email.me> <cc1c596f-a043-4ba7-9e55-b98fc12cc89c@googlegroups.com> |
On 7/18/2016 5:00 PM, Eric Douglas wrote:
> On Monday, July 18, 2016 at 2:10:07 PM UTC-4, Eric Sosman wrote:
>> 3) This is not the first "efficiency" question you've asked, which
>> leads me to fear that you may be well on the way to becoming an addict.
>> Stop! Stop now, while you still can! "Efficiency" is a drug as habit-
>> forming and as destructive as anything you can find in a darkened back
>> alley. If you get hooked, you'll never get clean. Trust me, I know:
>> The monkey has ridden my back for half a century despite my strenuous
>> efforts to dislodge it. Don't follow my pathway to ruin!
>
> It depends how big the efficiency problem is and how many places it's used.[...]
Right. Which means you must measure *before* fiddling around,
most especially before micro-fiddling.
- If you don't measure, you don't actually know whether you
have a problem.
- If you don't measure, you won't know whether any changes you
make are helpful or hurtful.
- If you decide a `for' loop is more efficient than an IntStream,
based on no evidence whatsoever, you're just thrashing around.
- Even if you have measurements in hand that demonstrate one is
more efficient than the other, bear in mind that the iteration
count of O-N-E H-U-N-D-R-E-D (!!!) is so small that any
conceivable difference will be noise.
- Finally, observe that by transforming a correct program from
IntStream to `for' loop you produced an *incorrect* program!
Faster, yes (even without measurement I'm confident of that),
but incorrect nonetheless. What price "efficiency," hmm?
--
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM
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Re: So I did "FizzBuzz", in Java! Daniel Pitts <usenet@coloraura.com> - 2016-07-18 09:26 -0700
Re: So I did "FizzBuzz", in Java! Eric Douglas <e.d.programmer@gmail.com> - 2016-07-18 10:10 -0700
Re: So I did "FizzBuzz", in Java! Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-18 14:09 -0400
Re: So I did "FizzBuzz", in Java! Eric Douglas <e.d.programmer@gmail.com> - 2016-07-18 14:00 -0700
Re: So I did "FizzBuzz", in Java! Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-18 17:30 -0400
Re: So I did "FizzBuzz", in Java! Eric Douglas <e.d.programmer@gmail.com> - 2016-07-19 05:06 -0700
Re: So I did "FizzBuzz", in Java! Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-19 08:13 -0400
Re: So I did "FizzBuzz", in Java! Eric Douglas <e.d.programmer@gmail.com> - 2016-07-19 05:18 -0700
Re: So I did "FizzBuzz", in Java! Martin Gregorie <martin@address-in-sig.invalid> - 2016-07-18 21:59 +0000
Re: So I did "FizzBuzz", in Java! Arne Vajhøj <arne@vajhoej.dk> - 2016-07-18 19:51 -0400
Re: So I did "FizzBuzz", in Java! Arne Vajhøj <arne@vajhoej.dk> - 2016-07-18 19:46 -0400
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