Which is faster...

[Craig Newman]

OK, I see what you mean.

I set a custom property of the card to the array I used earlier. It takes almost no time at all to put the contents of that property into a variable. It is not relevant whether it is a script local variable or not.

Bottom line, I do not think it makes any difference whether one uses a custom property or a variable to hold data in terms of the speed in which that data is retrieved.

Craig

> On Dec 14, 2023, at 7:33 PM, Bob Sneidar via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> That is not exactly the test he was looking for. He wants to compare retrieving an array from a script local variable vs. getting a property of an object like a stack, that contains the same array. At least I think that is the question. 
> 
> Now I’d like to discuss virtual properties. It takes the form: 
> 
> Local lValueA
> 
> setProp myVirtualProperty, pValueA
>   Put pValueA into lValueA
> End setProp
> 
> The reason this is really handy is because if pValueA is an array, you can then use the form: 
> 
> getProp myVirtualProperty [pKey]
>   If pKey is not empty then 
>      Return lValueA [pKey]
>   Else
>      Return tValueA
> End getProp
> 
> In other words, you can get elements of the array without getting the entire array itself i.e.:
> 
> Put the myVirtualProperty [“companyname”] of myLivecodeObject into tCompanyName
> 
> I use this quite extensively. I have a single card which contains all the currently queried database data for caching purposes, along with the currently selected indexes for each datagrid, and the currently selected primary keys. I call the getProp and setProp handlers maingriddata. So I can:
> 
> Get the maingriddata [“hilitedkeys”] of tMainCard
> Get the maingriddata [“hilitedindexes”] of tMainCard
> Get the maingriddata [“customers”]
> Put the queriedCustomersA into tMainGridDataA
> Set the maingriddata to tMainGridDataA
> 
> And so forth. Any kind of logic can be used in the getProp and setProp handlers. 
> 
> Bob S
> 
>> On Dec 14, 2023, at 2:25 PM, Craig Newman via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> Anything to distract me from my day job.
>> 
>> An array with 100,000 elements and a variable with 100,00 lines take the same time to place into a field.
>> 
>> The only time that took a while was building them. Each took 10 milliseconds.
>> 
>> Craig
>> 
>>> On Dec 14, 2023, at 4:55 PM, Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
>>> 
>>> Bob,
>>> 
>>> Thank you. I could script a timing test but sometime just asking the list or forums is easier. You asnwered well before I would have had the time to write a basic test script. Thanks!
>>> 
>>> 
>>> On 12/14/2023 4:45 PM, Bob Sneidar via use-livecode wrote:
>>>> I think the confusion comes from thinking so much of a stack as an object that has substance, when really all the properties are places in memory just like a memory variable is. I asked this some years back and the answer I got was that there is no appreciable difference.
>>>> 
>>>> One could always devise a test though…
>>>> 
>>>> Bob S
>>>> 
>>>> 
>>>> On Dec 14, 2023, at 1:22 PM, Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
>>>> 
>>>> Which is faster or more efficient (from an engine performance perspective)?
>>>> 
>>>> To retrieve an array from a property?
>>>> As in:
>>>> command someHandler -- in an objects script
>>>> get the cMyArray from me -- cMyArray is some multi-dimensional array
>>>> ...
>>>> end someHandler
>>>> 
>>>> OR
>>>> 
>>>> To retrieve an array from a script local variable?
>>>> As in:
>>>> local sMyArray -- script local variable in some objects script
>>>> 
>>>> command someHandler -- in an objects script
>>>> get sMyArray
>>>> ...
>>>> end someHandler
>>>> 
>>>> Anyone know?
>>>> 
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>>> 
>>> 
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>> 
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