7 Nov
2016
7 Nov
'16
12:16 p.m.
Hi Moose users,
as you may know, at Synectique we experiment lots of issues about memory
usage.
That's why i had a look at the number of unused instance variables in one
of our system loaded with a big model from one of our main customer.
Total instance variables: 26.852.653
Used instance variables: 17.393.938
Empty collections: 5.023.508
Recoverable instance variables: 14.482.223
The recoverable instance variables are those with nil or an empty
collection (or MultiValueLink)
As you can see, we can save a lot of memory :-)
Here is my (dirty) code to get that:
countUsedInstanceVariableInForSubInstances: aClass
| usedInstNbr instNbr emptyCollNbr |
usedInstNbr := 0.
instNbr := 0.
emptyCollNbr := 0.
aClass
allSubInstancesDo: [ :anEntity |
instNbr := instNbr + anEntity class allInstVarNames size.
anEntity class allInstVarNames
doWithIndex: [ :e :i |
(anEntity instVarAt: i)
ifNotNil: [ :content |
([
content isEmpty.
emptyCollNbr := emptyCollNbr + 1.
false ]
on: MessageNotUnderstood
do: [ false ])
ifFalse: [ usedInstNbr := usedInstNbr + 1 ] ] ] ].
^ {('Used instance variables' -> usedInstNbr).
('empty collections' -> emptyCollNbr).
('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
*Guillaume Larcheveque*
7 Nov
7 Nov
1:11 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Thanks Guillaume for sharing your code.
Alexandre
On Nov 7, 2016, at 8:16 AM, Guillaume Larcheveque
<guillaume.larcheveque(a)gmail.com> wrote:
Hi Moose users,
as you may know, at Synectique we experiment lots of issues about memory usage.
That's why i had a look at the number of unused instance variables in one of our
system loaded with a big model from one of our main customer.
Total instance variables: 26.852.653
Used instance variables: 17.393.938
Empty collections: 5.023.508
Recoverable instance variables: 14.482.223
The recoverable instance variables are those with nil or an empty collection (or
MultiValueLink)
As you can see, we can save a lot of memory :-)
Here is my (dirty) code to get that:
countUsedInstanceVariableInForSubInstances: aClass
| usedInstNbr instNbr emptyCollNbr |
usedInstNbr := 0.
instNbr := 0.
emptyCollNbr := 0.
aClass
allSubInstancesDo: [ :anEntity |
instNbr := instNbr + anEntity class allInstVarNames size.
anEntity class allInstVarNames
doWithIndex: [ :e :i |
(anEntity instVarAt: i)
ifNotNil: [ :content |
([
content isEmpty.
emptyCollNbr := emptyCollNbr + 1.
false ]
on: MessageNotUnderstood
do: [ false ])
ifFalse: [ usedInstNbr :=
usedInstNbr + 1 ] ] ] ].
^ {('Used instance variables' -> usedInstNbr).
('empty collections' -> emptyCollNbr).
('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
Guillaume Larcheveque
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
4:53 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Well yes, there was a reason we introduced FMNullMultivalueLink. The state handling of
MooseEntity and the deep inheritance with lots of unused instVars of Famix are the other
main memory users
Stephan
10 Nov
10 Nov
8:49 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Thanks
A task of Pavel will be to see how slots usage can reduce that space lost.
For the empty collection having a kind of
- sharing an #() in a classVar
- creating a new collection on use could be a solution.
Le 7/11/16 à 12:16, Guillaume Larcheveque a écrit :
Hi Moose users,
as you may know, at Synectique we experiment lots of issues about
memory usage.
That's why i had a look at the number of unused instance variables in
one of our system loaded with a big model from one of our main customer.
Total instance variables: 26.852.653
Used instance variables: 17.393.938
Empty collections: 5.023.508
Recoverable instance variables: 14.482.223
The recoverable instance variables are those with nil or an empty
collection (or MultiValueLink)
As you can see, we can save a lot of memory :-)
Here is my (dirty) code to get that:
countUsedInstanceVariableInForSubInstances: aClass
| usedInstNbr instNbr emptyCollNbr |
usedInstNbr := 0.
instNbr := 0.
emptyCollNbr := 0.
aClass
allSubInstancesDo: [ :anEntity |
instNbr := instNbr + anEntity class allInstVarNames size.
anEntity class allInstVarNames
doWithIndex: [ :e :i |
(anEntity instVarAt: i)
ifNotNil: [ :content |
([
content isEmpty.
emptyCollNbr := emptyCollNbr + 1.
false ]
on: MessageNotUnderstood
do: [ false ])
ifFalse: [ usedInstNbr := usedInstNbr + 1 ] ] ] ].
^ {('Used instance variables' -> usedInstNbr).
('empty collections' -> emptyCollNbr).
('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
*Guillaume Larcheveque*
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
13 Mar
13 Mar
1:53 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Reviving this old mail from Guillaume.
I did an analysis on a huge model (>2M entities) we have:
- .mse file: 372.5 MB
- .image file without the model: 86.9 MB
- image with model: 692.8 MB (thus apparently 605,9 MB used by the model)
Then I did a small experiment: I removed the four instance variables of
FAMIXSourcedEntity (sourceAnchor, sourceLanguage, comments,
declaredSourceLanguage) and replaced them by variables in the privateState
for example:
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite: #container>
<multivalued> <derived>
<MSEComment: 'list of comments defined in the entity'>
^comments
becomes
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite: #container>
<multivalued> <derived>
<MSEComment: 'list of comments defined in the entity'>
"^ comments"
^ self privateState cacheAt: #comments ifAbsentPut: nil
As a result, the .image file is 673.3 MB (thus apparently 586,4 MB used
by the model)
Not huge, but almost 20 MB saved, 3% of the initial memory
nicolas
On 10/11/2016 20:49, stepharo wrote:
Thanks
A task of Pavel will be to see how slots usage can reduce that space lost.
For the empty collection having a kind of
- sharing an #() in a classVar
- creating a new collection on use could be a solution.
Le 7/11/16 à 12:16, Guillaume Larcheveque a écrit :
--
Nicolas Anquetil -- MCF (HDR)
Project-Team RMod
Hi Moose users,
as you may know, at Synectique we experiment lots of issues about
memory usage.
That's why i had a look at the number of unused instance variables in
one of our system loaded with a big model from one of our main customer.
Total instance variables: 26.852.653
Used instance variables: 17.393.938
Empty collections: 5.023.508
Recoverable instance variables: 14.482.223
The recoverable instance variables are those with nil or an empty
collection (or MultiValueLink)
As you can see, we can save a lot of memory :-)
Here is my (dirty) code to get that:
countUsedInstanceVariableInForSubInstances: aClass
| usedInstNbr instNbr emptyCollNbr |
usedInstNbr := 0.
instNbr := 0.
emptyCollNbr := 0.
aClass
allSubInstancesDo: [ :anEntity |
instNbr := instNbr + anEntity class allInstVarNames size.
anEntity class allInstVarNames
doWithIndex: [ :e :i |
(anEntity instVarAt: i)
ifNotNil: [ :content |
([
content isEmpty.
emptyCollNbr := emptyCollNbr + 1.
false ]
on: MessageNotUnderstood
do: [ false ])
ifFalse: [ usedInstNbr := usedInstNbr + 1 ] ] ] ].
^ {('Used instance variables' -> usedInstNbr).
('empty collections' -> emptyCollNbr).
('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
*Guillaume Larcheveque*
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
11:07 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Wow!
Alexandre
On Mar 13, 2017, at 9:53 AM, Nicolas Anquetil
<Nicolas.Anquetil(a)inria.fr> wrote:
Reviving this old mail from Guillaume.
I did an analysis on a huge model (>2M entities) we have:
- .mse file: 372.5 MB
- .image file without the model: 86.9 MB
- image with model: 692.8 MB (thus apparently 605,9 MB used by the model)
Then I did a small experiment: I removed the four instance variables of
FAMIXSourcedEntity (sourceAnchor, sourceLanguage, comments, declaredSourceLanguage) and
replaced them by variables in the privateState
for example:
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite: #container>
<multivalued> <derived>
<MSEComment: 'list of comments defined in the entity'>
^comments
becomes
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite: #container>
<multivalued> <derived>
<MSEComment: 'list of comments defined in the entity'>
"^ comments"
^ self privateState cacheAt: #comments ifAbsentPut: nil
As a result, the .image file is 673.3 MB (thus apparently 586,4 MB used by the model)
Not huge, but almost 20 MB saved, 3% of the initial memory
nicolas
On 10/11/2016 20:49, stepharo wrote:
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
Thanks
A task of Pavel will be to see how slots usage can reduce that space lost.
For the empty collection having a kind of
- sharing an #() in a classVar
- creating a new collection on use could be a solution.
Le 7/11/16 à 12:16, Guillaume Larcheveque a écrit :
--
Nicolas Anquetil -- MCF (HDR)
Project-Team RMod
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev Hi Moose users,
as you may know, at Synectique we experiment lots of issues about memory usage.
That's why i had a look at the number of unused instance variables in one of our
system loaded with a big model from one of our main customer.
Total instance variables: 26.852.653
Used instance variables: 17.393.938
Empty collections: 5.023.508
Recoverable instance variables: 14.482.223
The recoverable instance variables are those with nil or an empty collection (or
MultiValueLink)
As you can see, we can save a lot of memory :-)
Here is my (dirty) code to get that:
countUsedInstanceVariableInForSubInstances: aClass
| usedInstNbr instNbr emptyCollNbr |
usedInstNbr := 0.
instNbr := 0.
emptyCollNbr := 0.
aClass
allSubInstancesDo: [ :anEntity |
instNbr := instNbr + anEntity class allInstVarNames size.
anEntity class allInstVarNames
doWithIndex: [ :e :i |
(anEntity instVarAt: i)
ifNotNil: [ :content |
([
content isEmpty.
emptyCollNbr := emptyCollNbr + 1.
false ]
on: MessageNotUnderstood
do: [ false ])
ifFalse: [ usedInstNbr :=
usedInstNbr + 1 ] ] ] ].
^ {('Used instance variables' -> usedInstNbr).
('empty collections' -> emptyCollNbr).
('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
Guillaume Larcheveque
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev 
14 Mar
14 Mar
11:02 a.m.
New subject: A quick analyzis of the usage of instance variables in Moose
Hi,
Nice!
But here we are saving memory. What about the performances for access the variables?
Because, when we try to minimize one, we are always changing the other.
Cheers,
Vincent
-----Message d'origine-----
De : Moose-dev [mailto:moose-dev-bounces@list.inf.unibe.ch] De la part de
Alexandre Bergel
Envoyé : lundi 13 mars 2017 23:08
À : Moose-related development
Cc : Philippe Valenza; christophe.allegrini(a)synectique.eu
Objet : [Moose-dev] Re: A quick analyzis of the usage of instance variables in
Moose
Wow!
Alexandre
--
Nicolas Anquetil -- MCF (HDR)
Project-Team RMod
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
!!!*************************************************************************************
"Ce message et les pièces jointes sont confidentiels et réservés à l'usage
exclusif de ses destinataires. Il peut également être protégé par le secret professionnel.
Si vous recevez ce message par erreur, merci d'en avertir immédiatement
l'expéditeur et de le détruire. L'intégrité du message ne pouvant être assurée sur
Internet, la responsabilité de Worldline ne pourra être recherchée quant au contenu de ce
message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission
exempte de tout virus, l'expéditeur ne donne aucune garantie à cet égard et sa
responsabilité ne saurait être recherchée pour tout dommage résultant d'un virus
transmis.
This e-mail and the documents attached are confidential and intended solely for the
addressee; it may also be privileged. If you receive this e-mail in error, please notify
the sender immediately and destroy it. As its integrity cannot be secured on the Internet,
the Worldline liability cannot be triggered for the message content. Although the sender
endeavours to maintain a computer virus-free network, the sender does not warrant that
this transmission is virus-free and will not be liable for any damages resulting from any
virus transmitted.!!!"
On Mar 13, 2017, at 9:53 AM, Nicolas Anquetil
<Nicolas.Anquetil(a)inria.fr>
wrote:
Reviving this old mail from Guillaume.
I did an analysis on a huge model (>2M entities) we have:
- .mse file: 372.5 MB
- .image file without the model: 86.9 MB
- image with model: 692.8 MB (thus apparently 605,9 MB used by the
model) Then I did a small experiment: I removed the four instance
variables of FAMIXSourcedEntity (sourceAnchor, sourceLanguage,
comments, declaredSourceLanguage) and replaced them by variables in
the privateState
for example:
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite:
#container> <multivalued> <derived>
<MSEComment: 'list of comments defined
in the entity'>
^comments
becomes
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite:
#container> <multivalued> <derived>
<MSEComment: 'list of comments defined
in the entity'>
"^ comments"
^ self privateState cacheAt: #comments ifAbsentPut: nil
As a result, the .image file is 673.3 MB (thus apparently 586,4 MB
used by the model) Not huge, but almost 20 MB saved, 3% of the initial
memory
nicolas
On 10/11/2016 20:49, stepharo wrote:
> Thanks
>
> A task of Pavel will be to see how slots usage can reduce that space lost.
> For the empty collection having a kind of
> - sharing an #() in a classVar
> - creating a new collection on use could be a solution.
>
> Le 7/11/16 à 12:16, Guillaume Larcheveque a écrit :
>> Hi Moose users,
>>
>> as you may know, at Synectique we experiment lots of issues about
memory usage.
>> That's why i had a look at the number
of unused instance variables in
one of our system loaded with a big model from one of our main customer.
>>
>> Total instance variables: 26.852.653 Used instance variables:
>> 17.393.938 Empty collections: 5.023.508 Recoverable instance
>> variables: 14.482.223
>>
>> The recoverable instance variables are those with nil or an empty
>> collection (or MultiValueLink)
>>
>> As you can see, we can save a lot of memory :-)
>>
>> Here is my (dirty) code to get that:
>>
>> countUsedInstanceVariableInForSubInstances: aClass
>> | usedInstNbr instNbr emptyCollNbr |
>> usedInstNbr := 0.
>> instNbr := 0.
>> emptyCollNbr := 0.
>> aClass
>> allSubInstancesDo: [ :anEntity |
>> instNbr := instNbr + anEntity class allInstVarNames
size.
>> anEntity class
allInstVarNames
>> doWithIndex: [ :e :i |
>> (anEntity instVarAt: i)
>> ifNotNil: [ :content |
>> ([
>> content isEmpty.
>> emptyCollNbr :=
emptyCollNbr + 1.
>>
false ]
>> on:
MessageNotUnderstood
>>
do: [ false ])
>> ifFalse: [
usedInstNbr := usedInstNbr + 1 ] ] ] ].
>> ^ {('Used instance variables'
-> usedInstNbr).
>> ('empty collections' -> emptyCollNbr).
>> ('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
('Total instance variables' -> instNbr)}
--
Guillaume Larcheveque
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
2:03 p.m.
New subject: A quick analyzis of the usage of instance variables in Moose
1st, no idea about time performances.
It would involve more sophisticated experiment that I cannot perform for now
2nd, I did a bit more experiments on the same line.
Each experiment builds on the previous one, so the last one touched 6
classes
- initial Famix MetaModel [692.8M]
- FAMIXSourcedEntity: sourceAnchor, sourceLanguage, comments,
declaredSourceLanguage [673.3M]
- FAMIXAssociation: next previous [665.7M]
- FAMIXNamedEntity:
isStub/modifiers/parentPackage/annotationInstances/receivingInvocations [?]
- FAMIXAccess: isWrite [?]
- FAMIXInvocation: receiver/receiverSourceCode/signature [652.9M]
- FAMIXContainerEntity:
outgoingReferences/types/incomingReferences/functions [644.2M]
Substracting 87M to all numbers for the actual model size, we get 605.8M
initially and 557.2M for the last one, which is about 50M save ( 8%)
Of course as we go deeper in the inheritance hierarchy, the memory save
will be smaller, but I believe there is still room for improvement
nicolas
On 14/03/2017 11:02, Blondeau Vincent wrote:
Hi,
Nice!
But here we are saving memory. What about the performances for access the variables?
Because, when we try to minimize one, we are always changing the other.
Cheers,
Vincent
--
Nicolas Anquetil -- MCF (HDR)
Project-Team RMod
-----Message d'origine-----
De : Moose-dev [mailto:moose-dev-bounces@list.inf.unibe.ch] De la part de
Alexandre Bergel
Envoyé : lundi 13 mars 2017 23:08
À : Moose-related development
Cc : Philippe Valenza; christophe.allegrini(a)synectique.eu
Objet : [Moose-dev] Re: A quick analyzis of the usage of instance variables in
Moose
Wow!
Alexandre
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
_______________________________________________
Moose-dev mailing list
Moose-dev(a)list.inf.unibe.ch
https://www.list.inf.unibe.ch/listinfo/moose-dev
!!!*************************************************************************************
"Ce message et les pièces jointes sont confidentiels et réservés à l'usage
exclusif de ses destinataires. Il peut également être protégé par le secret professionnel.
Si vous recevez ce message par erreur, merci d'en avertir immédiatement
l'expéditeur et de le détruire. L'intégrité du message ne pouvant être assurée sur
Internet, la responsabilité de Worldline ne pourra être recherchée quant au contenu de ce
message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission
exempte de tout virus, l'expéditeur ne donne aucune garantie à cet égard et sa
responsabilité ne saurait être recherchée pour tout dommage résultant d'un virus
transmis.
This e-mail and the documents attached are confidential and intended solely for the
addressee; it may also be privileged. If you receive this e-mail in error, please notify
the sender immediately and destroy it. As its integrity cannot be secured on the Internet,
the Worldline liability cannot be triggered for the message content. Although the sender
endeavours to maintain a computer virus-free network, the sender does not warrant that
this transmission is virus-free and will not be liable for any damages resulting from any
virus transmitted.!!!"
_______________________________________________
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https://www.list.inf.unibe.ch/listinfo/moose-dev On Mar 13, 2017, at 9:53 AM, Nicolas Anquetil
<Nicolas.Anquetil(a)inria.fr>
wrote:
Reviving this old mail from Guillaume.
I did an analysis on a huge model (>2M entities) we have:
- .mse file: 372.5 MB
- .image file without the model: 86.9 MB
- image with model: 692.8 MB (thus apparently 605,9 MB used by the
model) Then I did a small experiment: I removed the four instance
variables of FAMIXSourcedEntity (sourceAnchor, sourceLanguage,
comments, declaredSourceLanguage) and replaced them by variables in
the privateState
for example:
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite:
#container>
<multivalued> <derived>
<MSEComment: 'list of comments
defined in the entity'>
^comments
becomes
FAMIXSourcedEntity>>comments
"Returns the list of comments defined for the entity."
<MSEProperty: #comments type: #FAMIXComment opposite:
#container>
<multivalued> <derived>
<MSEComment: 'list of comments
defined in the entity'>
"^ comments"
^ self privateState cacheAt: #comments ifAbsentPut: nil
As a result, the .image file is 673.3 MB (thus apparently 586,4 MB
used by the model) Not huge, but almost 20 MB saved, 3% of the initial
memory
nicolas
On 10/11/2016 20:49, stepharo wrote:
> Thanks
>
> A task of Pavel will be to see how slots usage can reduce that space lost.
> For the empty collection having a kind of
> - sharing an #() in a classVar
> - creating a new collection on use could be a solution.
>
> Le 7/11/16 à 12:16, Guillaume Larcheveque a écrit :
>> Hi Moose users,
>>
>> as you may know, at Synectique we experiment lots of issues about
memory
usage.
>> That's why i had a look at the number
of unused instance variables in
one of our system loaded with a big model from one
of our main customer.
>> Total instance variables: 26.852.653 Used
instance variables:
>> 17.393.938 Empty collections: 5.023.508 Recoverable instance
>> variables: 14.482.223
>>
>> The recoverable instance variables are those with nil or an empty
>> collection (or MultiValueLink)
>>
>> As you can see, we can save a lot of memory :-)
>>
>> Here is my (dirty) code to get that:
>>
>> countUsedInstanceVariableInForSubInstances: aClass
>> | usedInstNbr instNbr emptyCollNbr |
>> usedInstNbr := 0.
>> instNbr := 0.
>> emptyCollNbr := 0.
>> aClass
>> allSubInstancesDo: [ :anEntity |
>> instNbr := instNbr + anEntity class allInstVarNames
size.
>> anEntity class
allInstVarNames
>> doWithIndex: [ :e :i |
>> (anEntity instVarAt: i)
>> ifNotNil: [ :content |
>> ([
>> content isEmpty.
>> emptyCollNbr :=
emptyCollNbr + 1.
>>
false ]
>> on:
MessageNotUnderstood
>>
do: [ false ])
>> ifFalse: [
usedInstNbr := usedInstNbr + 1 ] ] ] ].
>> ^ {('Used instance variables'
-> usedInstNbr).
>> ('empty collections' -> emptyCollNbr).
>> ('Recoverable instance variables' -> (instNbr - (usedInstNbr -
emptyCollNbr))).
>
('Total instance variables' -> instNbr)}
>
> --
> Guillaume Larcheveque
>
>
>
> _______________________________________________
> Moose-dev mailing list
>
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Nicolas Anquetil -- MCF (HDR)
Project-Team RMod
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participants (6)
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Alexandre Bergel -
Blondeau Vincent -
Guillaume Larcheveque -
Nicolas Anquetil -
Stephan Eggermont -
stepharo