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When you are programming, does the program run faster

if you type every instance of a constant in its place, or dimension the constant as a variable and type the variable in its place?

This open post was written 11 months, 4 weeks ago | V/U/S: 77, 13, 2 | Edit Post | Leave a reply | Report Post


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Since writing this post M. Wright has helped in 5 other users' posts within the last 4 days. M. Wright is a verified member, has been around for 1 year, 1 month and has 158 posts and 5,586 replies to their name.

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Dimension, Variable, computer programming, Constant, place, run, program, Type (How Tags Affect Reciprocity)

Replies (13)

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (6 minutes after post)

I’m not completely sure, but I think instance of a constant in its place. This is becuse it dosn’t have to acess the programs alloacted space for random memory storage and withdrawl the variable. Either way, it only makes less than a millisecond diference. It is impossiable to see, in simple programs anyway.

But you can’t really go by me, becuse I am just a beginner programmer in C++, .NET, and Java.

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M. Wright offline Verified User (1 year, 1 month) Long Term User Shouts: 4 #
An Unknown Location | 11 months, 4 weeks ago (7 minutes after post)

That’s what I was thinking.

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (8 minutes after post)

Awsome…lol

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M. Wright offline Verified User (1 year, 1 month) Long Term User Shouts: 4 #
An Unknown Location | 11 months, 4 weeks ago (8 minutes after post)

Somewhere in the future I am planning on writing a large program, and every bit of speed will matter. Right now I will use the variable because it is a long constant and just a small program.

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (10 minutes after post)

Yeah. If you are programming in C++ you can use a marco, so you can save time typing out.

You write with the other global declarations:

#define x2 = 2743345734.34538

somthing like that….I don’t think the format is right…
But thats only good for C++ anyway.

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M. Wright offline Verified User (1 year, 1 month) Long Term User Shouts: 4 #
An Unknown Location | 11 months, 4 weeks ago (11 minutes after post)

Macros. I heard about those.

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (12 minutes after post)

yeah…

than when you type out x2 the compiler changes it to the number.

Java and other languages might have them too…. what language is it in?

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M. Wright offline Verified User (1 year, 1 month) Long Term User Shouts: 4 #
An Unknown Location | 11 months, 4 weeks ago (13 minutes after post)

I’m learning Perl, Fortran, and Assembly just to learn about them. I know assembly has macros, but I’m not sure about the others.

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (15 minutes after post)

okay…. I don’t know those languages.

In C++, (I just looked ‘em up in my C++ Book =D)
they are written

#define var3 37474.343475

so whenever you type var3 it really means 37474.336….

It is prabely simular in those languages

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (17 minutes after post)

Goodluck with whatever it is =D

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M. Wright offline Verified User (1 year, 1 month) Long Term User Shouts: 4 #
An Unknown Location | 11 months, 4 weeks ago (17 minutes after post)

Thanks. Good luck.

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spiratec9 offline Verified User (1 year, 8 months) Long Term User Shouts: 8 #
Burnaby, BC, CA | 11 months, 4 weeks ago (1 hour, 1 minute after post)

it won’t make any difference because the compiler will substitute
the variable in for you.

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Ed23454 offline Unverified User #
An Unknown Location | 11 months, 4 weeks ago (1 hour, 11 minutes after post)

spiratec9 wrote:
it won’t make any difference because the compiler will substitute
the variable in for you.

Only if the variable is defined as constant. If it is a changing variable than it couldn’t be replaced by the compiler, it would be constant than.

Marcos & Constants can be used to make the compiler subsitute, however vairables, are variant.

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