Does "Remove Array Bounds Checks" perform on RUN-TIME?

[Rattagarn V.]

Hi,

I suspected in the compile tab in the project properties sheet. In advanced
optimizations, the Remove Array Bounds Checks option on that page means that
VB will check every time each element in array is accessed while the program
is running. Is my understand correct? Is it the same as Java? Because
Java will check all arrays while your program is running. This will slow
down the application. If my application loops the array of 10000 integer
elements, Java VM will check all 10000 integers.
Please ******** this in VB for me.

Best Regards,
Rattagarn V.

You've got it. If you check this box, then your _compiled_ program will
skip this checks, which can result in a speed increase. It does not affect
your program running in the IDE.

"Rattagarn V." <rattagarn@hotmail.com> wrote in message
news:395b7bd5$1@news.devx.com...
>
> Hi,
>
> I suspected in the compile tab in the project properties sheet. In
advanced
> optimizations, the Remove Array Bounds Checks option on that page means
that
> VB will check every time each element in array is accessed while the
program
> is running. Is my understand correct? Is it the same as Java? Because
> Java will check all arrays while your program is running. This will slow
> down the application. If my application loops the array of 10000 integer
> elements, Java VM will check all 10000 integers.
> Please ******** this in VB for me.
>
> Best Regards,
> Rattagarn V.

[Michael Culley]

I'd strongly recommend not using this feature. From my understanding, your
VB app will give a GPF if there is an error in your code. So your error handling
code won't work and you will have no idea where the error is.

The exception where I would use this is when speed was critical and in this
case I would put the routines in a seperate dll so that only those routines
where affected. Maybe in VB7 we could specify these parameters for each routine
or maybe even each line of code.

Michael Culley

<*> wrote:
>You've got it. If you check this box, then your _compiled_ program will
>skip this checks, which can result in a speed increase. It does not affect
>your program running in the IDE.
>
>"Rattagarn V." <rattagarn@hotmail.com> wrote in message
>news:395b7bd5$1@news.devx.com...
>>
>> Hi,
>>
>> I suspected in the compile tab in the project properties sheet. In
>advanced
>> optimizations, the Remove Array Bounds Checks option on that page means
>that
>> VB will check every time each element in array is accessed while the
>program
>> is running. Is my understand correct? Is it the same as Java? Because
>> Java will check all arrays while your program is running. This will
slow
>> down the application. If my application loops the array of 10000 integer
>> elements, Java VM will check all 10000 integers.
>> Please ******** this in VB for me.
>>
>> Best Regards,
>> Rattagarn V.
>
>

[Anthony Jones]

>>
From my understanding, your
VB app will give a GPF if there is an error in your code.
<<

Of course, we can protect ourselves from this by installing an unhandled
exception filter. A bigger problem is that the memory beyond the array may
be valid, perhaps it may contain data for other variables, so there is no
error just strange program behaviour.


--
Anthony Jones
Secta Group Ltd