[Newbies] appending Strings

[Mariano Abel Coca]

Actually, the definition of timeToRun in BlockContext is:

BlockContext>>timeToRun
    "Answer the number of milliseconds taken to execute this block."

    ^ Time millisecondsToRun: self


So, your example it's the same than:

[ do some stuff here ] timeToRun

Remember: let the objects do the work for you :-)


On Fri, Oct 3, 2008 at 6:13 PM, Mark Volkmann <mark at ociweb.com> wrote:

> On Oct 3, 2008, at 3:59 PM, Mariano Abel Coca wrote:
>
> I think you must be thinking in #timeToRun.
>
>
> No, but you saying that reminded me of where I saw it. It's in the Time
> class.
>
> ms := Time millisecondsToRun: [ do some stuff here ]
>
> Using this on the code below, the comma approach took 8478 milliseconds and
> the stream approach took 185 milliseconds. Big difference!
>
>

Nice... I've never measured it ;)


>
> About that... In VisualAge there are the EsbTracer and EsbSampler, which
> allows you to meassure the time that involves every message sent. It's
> useful to tune some code... But don't know in Squeak. Any ideas?
>
> Cheers,
>
> --
> Mariano.
>
> On Fri, Oct 3, 2008 at 5:44 PM, Mark Volkmann <mark at ociweb.com> wrote:
>
>> That reminds me. I know I ran across a method that runs a block and then
>> tells you how long it took. Anyone remember what that's called?
>>
>> On Oct 3, 2008, at 3:09 PM, Mariano Abel Coca wrote:
>>
>> Just check it by yourself. ;)
>>
>> |result|
>> 100 timesRepeat:
>> [ result := String new.
>> 4000 timesRepeat: [ result := result, 'abcdefg' ]].
>> ^result
>>
>>
>> |writer|
>> 100 timesRepeat:
>> [ writer := WriteStream on: String new.
>> 4000 timesRepeat: [ writer nextPutAll:'abcdefg' ]].
>> ^writer contents
>> Cheers,
>>
>> --
>> Mariano.
>>
>>
>> On Fri, Oct 3, 2008 at 2:02 PM, Herbert König <herbertkoenig at gmx.net>wrote:
>>
>>> Hello Mark,
>>>
>>> Friday, October 3, 2008, 4:52:39 PM, you wrote:
>>>
>>> MV> Is there a reason to prefer one of these approaches over the other?
>>> MV> Maybe one is more efficient and should be preferred if doing a large
>>> MV> number of appends.
>>>
>>> speed is the reason for the stream approach. The #, approach copies
>>> the first string once for each #, send.
>>>
>>>
>>> MV> Are there other approaches I should consider?
>>>
>>> Don't know of any but then I'm not an expert.
>>>
>>>
>>> Cheers,
>>>
>>> Herbert
>>>
>>> _______________________________________________
>>> Beginners mailing list
>>> Beginners at lists.squeakfoundation.org
>>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>>>
>>
>>
>>
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>>
>> ---
>> Mark Volkmann
>>
>>
>>
>>
>>
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>>
>
>
>
>
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>
>
> ---
> Mark Volkmann
>
>
>
>
>
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-- 
Mariano.
www.egola.com.ar
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