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code optimization [message #1758741]

Sat, 01 April 2017 10:40

Eclipse User

Hi,

The execution of the below code, takes a lot of time, Does anyone have a idea to optimize it?

if (MM_ETL!TransformationRule -> allInstances() -> exists (l|
l.source.resolvedType.elementName=MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name)-> collect (s|s.eType.name)->first()
or
MM_Src!EClass.allInstances() -> select(s|s.eSuperTypes.includes((MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name)-> collect (s|s.eType)->first())))-> select (s|s.name=l.source.resolvedType.elementName))->notEmpty()
))

I also write it in the below form, but it also takes about 5 minutes.

if (MM_ETL!TransformationRule -> allInstances() -> exists (l|
(MM_Src!EClass.allInstances() -> select(s|s.eSuperTypes.includes((MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name)->first().eType)))-> collect (s|s.name))
.append(MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name)->first().eType.name).includes(l.source.resolvedType.elementName)
))

any comment is appreciated.

[Updated on: Sat, 01 April 2017 14:41] by Moderator

Re: code optimization [message #1758797 is a reply to message #1758741]

Mon, 03 April 2017 05:36

Eclipse User

I think this is because I compute "MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name" twice.
How can I compute it once for expression "a"?

if I call the operation helper such as below, it still runs twice.

helper def: getType(a : MM_ETL!Expression) : String =
MM_Src!EStructuralFeature.allInstances() -> select (s|s.name=a.target.collectAllContainedElements()->last().name)->first().eType.name	
;

[Updated on: Mon, 03 April 2017 05:40] by Moderator

Re: code optimization [message #1758804 is a reply to message #1758797]

Mon, 03 April 2017 07:03

Eclipse User

Have a look here

Re: code optimization [message #1758819 is a reply to message #1758804]

Mon, 03 April 2017 09:49

Eclipse User

As I want to pass a variable "a" to it, I can not use Attribute helper.
but your link really helped me I used let expression to define a variable. thanks.

Re: code optimization [message #1758838 is a reply to message #1758819]

Mon, 03 April 2017 11:33

Eclipse User

Re-read this chapter because I don't think you understood the "context" part.

Re: code optimization [message #1758843 is a reply to message #1758838]

Mon, 03 April 2017 13:00

Eclipse User

Oh, Yes. if I write something like a.helper-name, I can use "a" in the helper with self keyword.

Re: code optimization [message #1758885 is a reply to message #1758843]

Tue, 04 April 2017 03:22

Eclipse User

That's it and it will be computed only one time no matter how many times it's called.

Re: code optimization [message #1758888 is a reply to message #1758885]

Tue, 04 April 2017 03:54

Eclipse User

Thanks so much.
if I have 3 expression "a", "b" and "c" and I want that code execute one time for "a", one time for "b" and one time for "c", can not I use it?

Re: code optimization [message #1758894 is a reply to message #1758888]

Tue, 04 April 2017 05:05

Eclipse User

Yes you can, it's one time per context element.

Re: code optimization [message #1758904 is a reply to message #1758894]

Tue, 04 April 2017 08:09

Eclipse User

Thanks for your kind help.

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