March 2017 - Pharo-dev - lists.pharo.org

Code Completion in Pharo
by komarlu2＠fit.cvut.cz March 4, 2017

March 4, 2017

Hello to all, I am a student at the Faculty of Information Technology of the Czech Technical University in Prague and I decided to make Code Completion in Pharo the topic ofÂ my Bachelor's degree and try to improve it. If you have suggestions on what should change / how to change it so you would be satisfied with it, I will appreciate any input on this topic. It would mean a lot to me if you could find two minutes and take this survey (there are only like 7 questions, so it won't take longer than those 2 minutes): https://docs.google.com/forms/d/e/1FAIpQLSd7lx6gIN079-vMvMwRsnA_AX_e_7sZEz2 XJQ4059nk_-LV6w/viewform Regards Lukas

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[ANN] XML Metadata Interchange (XMI) for Pharo
by Torsten Bergmann March 4, 2017

March 4, 2017

Hi, if you work with UML, modeling tools or model data exchange often you might know XMI - the XML Metadata Interchange format. I wrote a little package that makes it easier to work and browse data based on this format within Pharo. For instance you can open an XMI object either from a given stream or URL: (XMIFile fromURL: 'http://www.omg.org/spec/UML/20131001/UML.xmi') inspect You can also open a file XMIFile importFile Code is available on https://github.com/astares/Pharo-XMI The package includes a small GT extension allowing you to walk and dive through the XMI structure (see attached screenshot) and as the XMI nodes are unified it is easy to code some code generators or transformers in Pharo afterwards. For instance I used this package for a simple Pharo code generator based on Eclipse EMF models/diagrams. Within the code you will find some examples to browse through prominent XMI models like: - UML Spec => (XMIFile fromURL: 'http://www.omg.org/spec/UML/20131001/UML.xmi') inspect - VISUAL PARADIGM => (XMIFile fromURL: 'https://raw.githubusercontent.com/staruml/XMI/master/unittest-files/VP_XMI2…') inspect - ENTERPRISE ARCHITECT => (XMIFile fromURL: 'https://raw.githubusercontent.com/staruml/XMI/master/unittest-files/EA_XMI2…') inspect - ARCHIMATE => (XMIFile fromURL: 'https://www.reflektis.com/repos/archimate-3.0.xmi) inspect Once the inspector opens you have to select the "rootNode" and then the "Hierarchy" tab. In Pharo 6 you can load "XMI" right from catalog. Hope the package is useful for others too. Bye T.

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[ANN] Regex Tester Tool for Pharo
by Torsten Bergmann March 4, 2017

March 4, 2017

Hi, I wrote a little tool to test regular expressions and verify that given samples match it. It also helps to divide an expression into subexpressions to retrieve parts of a matched string. Screenshot is attached. Code, load instructions and full tutorial on how to use it is on https://github.com/astares/Pharo-Regex-Tools Hope it is useful for others too. Have fun! Bye T.

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Seamless integration with GTInspector
by Andrei Chis March 4, 2017

March 4, 2017

Hi Denis, Can you try Seamless with GTInspector in the latest version of Pharo or Moose and let me know if you see any slowness. Not sure how Seamless uses GTInspector to inspect proxy objects but now as the inspector uses FastTable by default there is no cache whatsoever. What this means is that the string representation shown in a FastTable presentation is recomputed every time fast table needs to display an element in a row or column. For example, this is the case when you scroll or when you resize the window (all visible elements are recomputed). In a local context the inspector is still very fast as it is. Just we should double check that it's also the case for Seamless. If not there are some caches that could be put into place relatively easy, either at the level of the inspector or fast table. Just before doing this I'd like to know if this is actually a problem. Cheers, Andrei

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[Pharo6] [Issue Tracker] Current Status
by Marcus Denker March 4, 2017

March 4, 2017

Hi, The current status is: Issues Tagged Pharo6: 52 Overall: 598 In the sprint *TODAY* we will remove all the Pharo6 tags from Priority âWould be niceâ and âFix if Timeâ. Please check the issues and change the priority of needed: https://pharo.fogbugz.com/f/filters/1192/6-0-All

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Really amazing bug (or feature) with compiling some ifTrue expressions
by Denis Kudriashov March 3, 2017

March 3, 2017

Hi. try these expressions in playground: 10 ifTrue: [ #falseResult ]. "=>DNU #ifFalse". 10 ifTrue: [ #falseResult. ]. #unexpectedResult. "=> #unexpectedResult" 10 ifTrue: [ #falseResult asString]. #unexpectedResult. "=> DNU #ifTrue:" Same happen with ifFalse: and ifTrue:ifFalse couples. If you look at bytecode you will not see any jumps in not failing cases. Probably such code is redundant because it not produce any behaviour. It start to work properly as soon as there is any assignment or message send around. But it is really strange from first look. Also it means that special boolean objects with own ifTrue:ifFalse implementation will not receive messages in such cases. I am not sure if it is a bug

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Call for action: Describe your catalog entries
by Torsten Bergmann March 3, 2017

March 3, 2017

The following snippet allows you to use the HelpBrowser to go through the descriptions of all currently listed catalog projects: |topic sub st| topic := HelpTopic named: 'CATALOG CONTENTS'. st := STON fromString: (ZnEasy get: 'http://catalog.pharo.org/catalog/json') contents. st collect: [:each | sub := HelpTopic title: (each at: #name) contents: (each at: #description) asString. topic addSubtopic: sub. ]. HelpBrowser openOn: topic Many of them have a simple descriptions missing. So if you are the author of a project please add a good description to your ConfigurationOf... Also update your configurations for Pharo 6.0 and put it into http://smalltalkhub.com/#!/~Pharo/MetaRepoForPharo60 If you have an interesting project that is not yet in the catalog then take a few minutes to build a ConfigurationOf... package and class. Using Tools -> Versionner for that is really easy. Also not that Versionner has a context menu allowing you to generate the methods necessary for the catalog. Thx T.

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Re: [Pharo-dev] Growing large images: the case of Moose models
by philippe.back＠highoctane.be March 3, 2017

March 3, 2017

Le 3 mars 2017 13:56, "ClÃ©ment Bera" <bera.clement(a)gmail.com> a Ã©crit : On Fri, Mar 3, 2017 at 12:12 PM, Cyril Ferlicot D. <cyril.ferlicot(a)gmail.com > wrote: > On 03/03/2017 11:56, ClÃ©ment Bera wrote: > > Hello everyone, > > > > This morning I investigated with Vincent Blondeau a problem reported by > > the Moose community a while ago: loading Moose model is slower in Spur > > (Pharo 5+) than in pre-Spur (Pharo 4 and older). In general, this > > problem was present for anyone growing images to a significant size. > > > > To investigate the problem, we loaded a 200Mb[3] Moose model on a 250Mb > > image, growing the image to 450Mb. Loading such a model takes 2 minutes > > in Spur and 1m30s in pre-Spur VMs. > > > > Using the stable Pharo VM, the analysis results were the following: > > - total time spent to load the Model: 2 minutes > > - time spent in full GC: 1 minute (4 fullGCs) > > - time spent in scavenges[1]: 15 seconds > > On the 2 minutes spent, we have 50% of the time spent in full GCs, 12.5% > > in scavenges, 37.5% executing code. > > > > We then used the latest VM that features the new compactor (VM from > > beginning of March 2017 and over). The full GC execution time went down > > from 1 minute to 2 seconds. > > > > In addition, we increased the size of Eden[2] from 4Mb to 12Mb. Time > > spent in scavenges decreased from 15 seconds to 5 seconds. > > > > Overall, loading the model is now taking ~50 seconds instead of 2 > minutes. > > > > To increase Eden size, one needs to run a script similar to: > > > > | currentEdenSize desiredEdenSize | > > currentEdenSize := Smalltalk vm parameterAt: 44. > > desiredEdenSize := currentEdenSize * 4. > > Smalltalk vm parameterAt: 45 put: desiredEdenSize. > > > > _*And then restart the image.*_ > > > > I hope this report can be useful for some of you. I will try to make a > > blog post out of it, detailing other GC settings one can change from the > > image to improve performance. > > _* > > *_ > > Best, > > > > Clement > > > > [1] A scavenge is basically the garbage collection of only young objects > > [2] Eden is basically the space where objects are initially allocated. > > [3] All numbers in the report are order of magnitudes and not precise > > numbers > > > > > > > > Hi, > > This is great! We will probably try it soon on our models. > > Guillaume had a question also, what is the counterparty if we let the > EdenSize at this size when we are not loading/exporting a MSE? > There are 2 main counterparts: - You waste a bit of memory. If you increase from 4Mb to 12Mb, you waste 8Mb. - The user-pauses for scavenges may be more significant. There are customers using 64Mb Eden in production. It improves their performance, they do not care about wasting 60Mb on machine with 16Gb RAM and their application does heavy computation and does not need to be that responsive. However for UI applications (typically the IDE), the scavenge pauses may become significant enough to be noticed by the programmer. Maybe not at 12Mb, but certainly at 64Mb. For your case: - Do you care that your application use some more Mb of RAM ? - Do you care if your application takes a couple extra ms to answer a request ? (In any case, the full GC takes much more time and also delays the answer right now) If you don't care, you can use larger Eden. In any case, an Eden of 12 or 16 Mb should be safe. There are other settings that can be useful in your case. I will try to write a post about it. > Because in our case we deploy a server that might need to read some MSE. > We cannot restart it with our current solution. In that case it would be > good to have more info to select the best EdenSize for the server. > > Thank you! > I have images that do not shrink with the new compactor and as there are no leaks I am wondering if there is a way for me to diagnose why this happens. I am routinely loading 100MB XML in the image but these are only transient. Shrinking works with a Pharo6 image but not with a 5.0 based. Strange. Anyone willing to pair over the internet to have a look? It is annoying because I am providing those images to customers and an ever growing thing is not really great especially with a non standard tech I am trying to push forward there. Phil > -- > Cyril Ferlicot > > http://www.synectique.eu > > 2 rue Jacques PrÃ©vert 01, > 59650 Villeneuve d'ascq France > >

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[pharo-project/pharo-core]
by GitHub March 3, 2017

March 3, 2017

Branch: refs/tags/60427 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] 4389a1: 60427
by GitHub March 3, 2017

March 3, 2017

Branch: refs/heads/6.0 Home: https://github.com/pharo-project/pharo-core Commit: 4389a1ae3caf1381f4d33eb97d9849a5a8ead0a0 https://github.com/pharo-project/pharo-core/commit/4389a1ae3caf1381f4d33eb9… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2017-03-03 (Fri, 03 Mar 2017) Changed paths: M Monticello.package/MCClassDefinition.class/instance/installing/createClass.st M Morphic-Widgets-FastTable.package/FTTableContainerMorph.class/instance/private/calculateStartIndexWhenShowing_.st M Morphic-Widgets-FastTable.package/FTTableMorph.class/instance/initialization/initialize.st M Morphic-Widgets-FastTable.package/FTTableMorph.class/instance/private/resizeAllSubviews.st M Morphic-Widgets-FastTable.package/FTTableMorph.class/instance/private/rowIndexToVerticalScrollBarValue_.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/README.md A Reflectivity-Tools-Tests.package/BreakpointTest.class/definition.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/instance/initialization/setUp.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/instance/initialization/tearDown.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/instance/tests/testRemoveClassWithBreakpoint.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/instance/tests/testRemoveMethodWithBreakpoint.st A Reflectivity-Tools-Tests.package/BreakpointTest.class/instance/utils/newDummyClass.st A Reflectivity-Tools-Tests.package/extension/Breakpoint/class/all.st R Reflectivity-Tools.package/Breakpoint.class/class/class initialization/initialize.st A Reflectivity-Tools.package/Breakpoint.class/class/class initialization/registerInsterestToSystemAnnouncement.st A Reflectivity-Tools.package/Breakpoint.class/class/initialization/initialize.st A Reflectivity-Tools.package/Breakpoint.class/class/removing/removeBreakpointsFromMethod_.st A Reflectivity-Tools.package/Breakpoint.class/class/system announcements/handleClassRemoved_.st A Reflectivity-Tools.package/Breakpoint.class/class/system announcements/handleMethodRemoved_.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60426.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60427.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60426.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60427.st M ScriptLoader60.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 60427 18207 Breakpoints still held after a method/class with breakpoints is removed https://pharo.fogbugz.com/f/cases/18207 19669 FastTable jumps to the selected element when its resized https://pharo.fogbugz.com/f/cases/19669 19775 Bootstrapped image does not contain class comment of the Context class https://pharo.fogbugz.com/f/cases/19775 http://files.pharo.org/image/60/60427.zip

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