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xbase expression performance issue with nested feature calls [message #1753914]

Sun, 12 February 2017 11:29

paul lu

Messages: 41
Registered: April 2013

Member

Hi,

We are upgrading an xbase based dsl project from 2.3.1 to 2.10 and met a performance issue. It seems that when an xbase expression is deeply nested with feature calls, the performance is poor.
The following xbase expression in op will always block the IDE:

//file: test.dmodel
package t{
entity M{
op t(){
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
(1..10).forEach[
]]]]]]]]]]

}
}
}

This can be reproduced using the example dmodel project.

We are using a xbase based language for GWT development and need html alike deeply nested structure to express screen layout.

Thanks

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Re: xbase expression performance issue with nested feature calls [message #1753916 is a reply to message #1753914]

Sun, 12 February 2017 13:18

Jan Koehnlein

Messages: 757
Registered: July 2009
Location: Hamburg

Senior Member

Was that faster with prior versions?

---
Get professional support from the Xtext committers at www.typefox.io

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Re: xbase expression performance issue with nested feature calls [message #1753917 is a reply to message #1753916]

Sun, 12 February 2017 13:29

paul lu

Messages: 41
Registered: April 2013

Member

Yes, version 2.3.1 was much faster and I was able to edit the same code smoothly.

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Re: xbase expression performance issue with nested feature calls [message #1753918 is a reply to message #1753917]

Sun, 12 February 2017 13:45

Akos Kitta

Messages: 25
Registered: November 2015

Junior Member

Paul,

Could you run a profiler on it? If so, it would be useful if you could share your results.

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Re: xbase expression performance issue with nested feature calls [message #1753946 is a reply to message #1753914]

Mon, 13 February 2017 09:20

Karsten Thoms

Messages: 596
Registered: July 2009
Location: Dortmund, Germany

Senior Member

Hi Paul, I can confirm that your expression takes significant time. Could you please be so kind to raise an issue here: https://github.com/eclipse/xtext-extras/issues. I would create the profile data then.

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