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Re: Picture colors decreasing script.

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.javascript
Subject Re: Picture colors decreasing script.
Date 2021-03-04 02:07 +0000
Organization A noiseless patient Spider
Message-ID <87o8fzoen1.fsf@bsb.me.uk> (permalink)
References (5 earlier) <ae17e712-ed89-4b7c-9a6e-c4d2d224bbb2n@googlegroups.com> <2188480.ElGaqSPkdT@PointedEars.de> <663d9d05-08a6-4593-883e-0b68f64a2c93n@googlegroups.com> <1775923.tdWV9SEqCh@PointedEars.de> <432d6208-3469-4b90-b378-536582e46760n@googlegroups.com>

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"Michael Haufe (TNO)" <tno@thenewobjective.com> writes:

> On Wednesday, March 3, 2021 at 2:53:26 PM UTC-6, Thomas 'PointedEars' Lahn wrote:
>> Michael Haufe (TNO) wrote: 
>> > <https://jsbench.me/ulkltk1xpk>
>> Fascinating; slicing is 93.08 % slower than direct access. But why?
>
> Given the steps slice takes, this should not be surprising:
>
> <https://tc39.es/ecma262/#sec-array.prototype.slice>
>
> Direct access is O(1)
>
> `slice` is O(N) where N is end - start

Isn't that O(1) for the case in question?  (Big O might be too crude a
measure for this.)

> Thus an order of magnitude worse.

-- 
Ben.

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Thread

Picture colors decreasing script. Kristjan Robam <kristjanrobam01@mail.ee> - 2021-02-28 22:33 -0800
  Re: Picture colors decreasing script. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-01 11:56 -0800
    Re: Picture colors decreasing script. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-02 13:42 +0100
      Re: Picture colors decreasing script. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-03 07:02 -0800
        Re: Picture colors decreasing script. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-03 19:47 +0100
          Re: Picture colors decreasing script. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-03 11:37 -0800
            Re: Picture colors decreasing script. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-03 21:33 +0100
              Re: Picture colors decreasing script. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-03 12:38 -0800
                Re: Picture colors decreasing script. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-03 21:53 +0100
                Re: Picture colors decreasing script. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-03 16:36 -0800
                Re: Picture colors decreasing script. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-03-04 02:07 +0000
          Re: Picture colors decreasing script. John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-04 09:40 +0000

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