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Long ATL file taking much time to save in Eclipse [message #1791306]

Wed, 27 June 2018 22:52

Eclipse User

Not sure if this is a problem of Eclipse but my ATL file with approx 2000 lines of code takes too long to save in Eclipse. I am using Eclipse Oxygen with ATL 3.8 installed.

Re: Long ATL file taking much time to save in Eclipse [message #1791320 is a reply to message #1791306]

Thu, 28 June 2018 02:52

Eclipse User

This should have been fixed in ATL 3.7 already:
https://projects.eclipse.org/projects/modeling.mmt.atl/releases/3.7.0

Can you post the ATL file, so I can reproduce the problem?

Re: Long ATL file taking much time to save in Eclipse [message #1791352 is a reply to message #1791320]

Thu, 28 June 2018 06:07

Eclipse User

Hi Dennis,

Thanks for replying.

I tried ATL 3.7 with Eclipse Neon but the issue still persists. Here is the ATL file.

Best,
Ruchika

Attachment: Test.atl
(Size: 102.87KB, Downloaded 172 times)

Re: Long ATL file taking much time to save in Eclipse [message #1791453 is a reply to message #1791352]

Fri, 29 June 2018 13:20

Eclipse User

I've reproduced your problem: this is indeed not workable. The problem is the ATL parser, which is not efficient in parsing imperative "do" block code, i.e. the large pieces of code in your called rules. I've attached my measurements (you can load the .nps file in jvisualvm for a detailed analysis).

You may log a bug for this in the Eclipse Bugzilla.

Attachment: snapshot-1530213987259.nps
(Size: 195.45KB, Downloaded 156 times)
Attachment: Schermafdruk van 2018-06-28 21-27-23.png
(Size: 148.88KB, Downloaded 165 times)

Re: Long ATL file taking much time to save in Eclipse [message #1791932 is a reply to message #1791453]

Sat, 07 July 2018 19:35

Eclipse User

Thanks for the analysis.

I have now logged a bug (#536787) for it.

Any idea if this will be fixed soon?

[Updated on: Tue, 10 July 2018 21:58] by Moderator

Re: Long ATL file taking much time to save in Eclipse [message #1792020 is a reply to message #1791932]

Tue, 10 July 2018 03:44

Eclipse User

Hello,

There is indeed a performance issue with parsing large action blocks (aka. 'do' blocks) containing many nested if statements.

Most of the time parsing your ATL file is spent parsing rule connectNodes, which contains such an action block.

Here is a first workaround to try:
- put rule connectNodes in a separate ATL file (e.g., connectNodes.atl)
- keep all other rules in the first ATL file,
- superimpose both files for execution.

connectNodes.atl will still require a long parsing time, but you should be able to work on your other rules normally.

A second workaround (that may be combined with the first one) is to divide rule connectNodes into several subrules, avoiding having a single rule with too many nested if statements.

Best regards,

Frédéric

[Updated on: Thu, 12 July 2018 13:49] by Moderator

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