字符串+ vs& [英] Strings + vs &

问题描述

亲爱的，

使用+进行字符串连接是否有任何性能差异？ vs"&"？

我认为，该编译器为两者生成相同的代码。我是对的吗？

谢谢，

Boni

Dear all,
Is there any perfomance difference in string concatination using "+" vs "&"?
I think, that compiler produces the same code for both. Am I right?
Thank you,
Boni

推荐答案

两者都有相同的速度它是字符串连接。+运算符迟到

绑定并且必须执行类型检查和转换。


问候，

C＃， VB.NET，SQL SERVER，UML，DESIGN Patterns面试问题书
http：/ /www.geocities.com/dotnetinterviews/

Both have same speed if it is string concatenation.+ operator is late
bound and must perform type checking and conversions.

Regards ,
C#, VB.NET , SQL SERVER , UML , DESIGN Patterns Interview question book
http://www.geocities.com/dotnetinterviews/

尽管性能可能相同，但我建议使用&因为那里有
的情况下它会编译但行为与你的预期不同

如果你使用+。

（我还没有得到一个方便的例子，但它们存在...）

-

David Anton
www.tangiblesoftwaresolutions.com

即时C＃：VB.NET转换为C＃转换器

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"希欧波尼"写道：

Even though performance is likely the same, I recommend using & since there
are cases where it will compile but behave differently from what you expect
if you use +.
(I haven''t got an example handy, but they exist...)
--
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB.NET to C# Converter
Instant VB: C# to VB.NET Converter
Instant J#: VB.NET to J# Converter
Clear VB: Cleans up outdated VB.NET code
"Boni" wrote:

亲爱的，
使用+字符串连接是否有任何性能差异？ vs"&"？
我认为，该编译器为两者生成相同的代码。我是对的吗？
谢谢你，
Boni

Dear all,
Is there any perfomance difference in string concatination using "+" vs "&"?
I think, that compiler produces the same code for both. Am I right?
Thank you,
Boni

Boni，


有些情况下+开始计数。所以尽量永远使用

&在VB.Net中进行连接


我认为这句话的选项严格是有效的


" 111" + 1它给你112

而

" 111" &安培; 1给你比1111

我希望这有帮助，


Cor

Boni,

There are situations where the + starts counting. So try to use forever the
& for concatination in VB.Net

I thought that it was that with option strict of this sentence is valid

"111" + 1 it gives you "112"
while
"111" & 1 gives you than 1111

I hope this helps,

Cor

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