Do sealed classes really offer performance Benefits?

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1.50/5 (2 votes)

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C#

OOP

Hi anyone have answer,
Using sealed Class Can We get performance Benefits?
Thanks
Akash

Posted 3-Jun-12 21:40pm

Akash Detroja

Updated 3-Jun-12 22:01pm

v2

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Sergey Alexandrovich Kryukov 4-Jun-12 3:45am

How this idea could come into your head?
--SA

3 solutions

Solution 3

Hi,

Sealed, internal, private all this are just restrict class for visibility. this will not impact on your code performance.

Thanks
-Amit

Posted 3-Jun-12 21:49pm

AmitGajjar

Comments

Sergey Alexandrovich Kryukov 4-Jun-12 4:00am

Not exactly. "Sealed" has nothing to do with visibility. I explained what it is in my answer.
The conclusion on the impact of performance is correct.
--SA

AmitGajjar 4-Jun-12 4:09am

you can not inherit => it means it's visibility access is limited for inheritance(wording mistake :)). if you have non-sealed class and sealed class, do you think performance will increase in case of sealed class!!!!!! No, that's what i just said.

Sergey Alexandrovich Kryukov 4-Jun-12 12:42pm

Did you read my answer? Any my comment? I clearly stated that sealed cannot affect performance and confirmed that your conclusion is correct.
(If, by any chance, that was you who down-voted my answer because you did not understand my words, please fix it.)

By the way, I did not down-voted your answer, to give you a chance to fix it instead.
So, please fix your wording, stop confusing people. In the body of your question, tell the reader about access separately, and about limiting inheritance separately -- you understand it correctly. Anyway, I already explained things in my answer.

Thank you.
--SA

AmitGajjar 5-Jun-12 0:00am

i never down-vote any one. because i feel that if we down-vote it will demotivate people to do more contribution. what i do is just add some comment if i feel incorrect. and even i can't down-vote your answers even in dream, bcoz your my CP role model :)

Solution 1

look C# Tweaks – Why to use the sealed keyword on classes?[^]

Posted 3-Jun-12 21:44pm

Prosan

Comments

Sergey Alexandrovich Kryukov 4-Jun-12 3:50am

I voted 1 for this answer as well as for this article.
Did you read this article? Did you see the authors speculations about performance? Could you see a trivial logical flaw in those speculations?

You should only answer a question is you have your own opinion and sure about it. Otherwise, not answering is way more useful. Please remember that such answer may cost too much wasted time for an inexperienced inquirer; be responsible.

--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-06-03T21:44:00

Solution 2

No, not at all. There is no reason for them to offer better performance; otherwise it would mean idiotic language design with compromised performance for non-sealed classes, for no reason. And the design of C# is not idiotic at all. :-)

The purpose of the sealed classed is completely different: this is just a fool-proof feature used to prevent creation of the derived classes from the base classes not designed for this purpose — no more, no less.

—SA

Posted 3-Jun-12 21:44pm

Sergey Alexandrovich Kryukov

Updated 3-Jun-12 21:58pm

v2

Comments

VJ Reddy 4-Jun-12 3:51am

Nice answer. 5!

Sergey Alexandrovich Kryukov 4-Jun-12 3:58am

Thank you, VJ.
--SA

Espen Harlinn 4-Jun-12 10:07am

5'ed!

Sergey Alexandrovich Kryukov 4-Jun-12 12:37pm

Thank you, Espen.
--SA