On 18 May 2010 14:19, Dylan Tusler
<[email protected]> wrote:
> Is >= slower than > by itself?
Not at all.
if (foo == 10000)
00053EEC cmp dword ptr [ebp-54h],2710h
00053EF3 jne CTrimAutoDeployModule::main+8Ch (53EFCh)
{
foo=0;
00053EF5 mov dword ptr [ebp-54h],0
}
if (foo > 10000)
00053EFC cmp dword ptr [ebp-54h],2710h
00053F03 jle CTrimAutoDeployModule::main+9Ch (53F0Ch)
{
foo=0;
00053F05 mov dword ptr [ebp-54h],0
}
if (foo >= 10000)
00053F0C cmp dword ptr [ebp-54h],2710h
00053F13 jl CTrimAutoDeployModule::main+0ACh (53F1Ch)
{
foo=0;
00053F15 mov dword ptr [ebp-54h],0
}
You could optimise the zeroing and compares, but the branches all come
out the same.
>
>
> Dylan.
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of DotNet Dude
> Sent: Tuesday, 18 May 2010 2:12 PM
> To: ozDotNet
> Subject: Re: How To do something every so often
>
> Dylan never said it was multithreaded... that would have been a critical
> piece of info and I'm sure he wouldn't leave it out. He said "very simple
> little console app" which rules out multithreading. :p
>
>
> On Tue, May 18, 2010 at 2:04 PM, Bill McCarthy <[email protected]> wrote:
>> Possibly, but if you make the code multithreaded you'd have to use an
>> interlocked increment. Use of a >= or a higher order bit bit-mask
>> means you don't have to lock as such (if you aren't worried about the
>> exact count)
>>
>> |-----Original Message-----
>> |From: [email protected] [mailto:ozdotnet-
>> |[email protected]] On Behalf Of DotNet Dude
>> |Sent: Tuesday, 18 May 2010 1:21 PM
>> |To: ozDotNet
>> |Subject: Re: How To do something every so often
>> |
>> |Wouldn't this be enough?
>> |
>> |counter+=1;
>> |...
>> |if (counter == 10000) {
>> | ...
>> | counter = 0;
>> |}
>> |
>> |
>> |On Mon, May 17, 2010 at 1:30 PM, Dylan Tusler
>> |<[email protected]> wrote:
>> |> I was just writing a very simple little console app to move data
>> |> from one file to another (under certain conditions) and I thought
>> |> it would be beneficial if the output gave some feedback that something
>> was happening.
>> |>
>> |> So, for each file, for every 10,000 lines processed, I put a "."
>> |> out via Console.Write
>> |>
>> |> Seems simple enough, but I was wondering how you would go about
>> |determining
>> |> that you got through 10,000 lines?
>> |>
>> |> Here was my approach:
>> |>
>> |> int counter=0;
>> |>
>> |> while ((line = fs.ReadLine()) != null) {
>> |> // do stuff - snipped
>> |> counter++;
>> |> if ((int)(counter/10000)*10000 == counter)
>> |> {
>> |> Console.Write(".");
>> |> }
>> |> }
>> |>
>> |> This works fine in my application, but I was wondering what
>> |> different approaches were available, especially considering there
>> |> is a bit of
>> wasted
>> |> math here, seems like it could be costly for a very long running process.
>> |> (In my situation, the app will be processing many millions of rows
>> |> of
>> data,
>> |> so small savings could add up to a big net saving.)
>> |>
>> |> Cheers,
>> |>
>> |> Dylan Tusler
>> |>
>> |>
>> |>
>> |>
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>> |> maile 3_0_0
>>
>>
>
--
Meski
"Going to Starbucks for coffee is like going to prison for sex. Sure,
you'll get it, but it's going to be rough" - Adam Hills
