August 2011 - Pharo-dev - lists.pharo.org

[Pharo-project] [update 1.4] #14110
by Marcus Denker Aug. 23, 2011

Aug. 23, 2011

14110 ----- Issue 4642: FinderUI>>compileSource: aString notifying: aController http://code.google.com/p/pharo/issues/detail?id=4642 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] [update 1.3] #13300
by Marcus Denker Aug. 23, 2011

Aug. 23, 2011

13300 ----- Issue 4430: When copying a class, do not copy the methods it obtains from Traits http://code.google.com/p/pharo/issues/detail?id=4430 Issue 4642: FinderUI>>compileSource: aString notifying: aController http://code.google.com/p/pharo/issues/detail?id=4642 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] 3 years postdoc position on dynamic language and security
by StÃ©phane Ducasse Aug. 23, 2011

Aug. 23, 2011

We have a 3 year postdoc position on dynamic languages and security: http://rmod.lille.inria.fr/web/pier/blog/2011-08-19-2 Do not hesitate to apply Postdoc Position â¢ Duration: 3 years â¢ Starting date: end 2011 â¢ Where: RMOD team at INRIA Lille Nord Europe http://rmod.lille.inria.fr â¢ Salary: 55 Keuros net (before taxes) Keywords: dynamic languages, security, information flow, Smalltalk, Javascript The position will take place in the context of the Systematic Resilience project. We will focus on the following main tasks: â¢ Identification and understanding of security problems in Javascript and other dynamic languages â¢ Study and analyze existing approaches towards securing Javascript (Caja, isolates...) â¢ Comparison of different approaches to secure dynamic applications (Zope model, ZTK), Ruby â¢ Study of Mirrors/Capabilities as a basis for security in Javascript â¢ Proposition of an safe architecture for Resilience Please contact Stephane Ducasse (Stephane.Ducasse(a)inria.fr) for more information. Stef ------------------------ Dr. StÃ©phane Ducasse -- Directeur de Recherche (Senior Researcher) INRIA - USTL - CNRS UMR 8022 stephane.ducasse(a)inria.fr http://stephane.ducasse.free.fr http://rmod.lille.inria.fr/ **NEW ***Tel 00 33 (0)3 20 43 42 56 - Fax 33 3 59 57 78 50 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France.

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[Pharo-project] [update 1.4] #14109
by Marcus Denker Aug. 23, 2011

Aug. 23, 2011

14109 ----- Issue 4678: AbstractTool modified again :) http://code.google.com/p/pharo/issues/detail?id=4678 Issue 4430: When copying a class, do not copy the methods it obtains from Traits http://code.google.com/p/pharo/issues/detail?id=4430 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] [update 1.4] #14093
by Marcus Denker Aug. 23, 2011

Aug. 23, 2011

14093 ----- Issue 4645: use a bit more {} instead of Array with: http://code.google.com/p/pharo/issues/detail?id=4645 Issue 4644: subclass of ReadStreamTest to test RWBinaryOrTextStreamTest http://code.google.com/p/pharo/issues/detail?id=4644 Issue 4634: Tools menu build by code from Deprecated13 http://code.google.com/p/pharo/issues/detail?id=4634 Issue 4627: Remove deprecated from NullTextStyler http://code.google.com/p/pharo/issues/detail?id=4627 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] Concurrency-Oriented Programming in Pharo
by Andrew P. Black Aug. 23, 2011

Aug. 23, 2011

I was looking at some old slides of Joe Armstrong on Concurrency-orinted programming. He set the following challenge: Put N processes in a ring: Send a simple message round the ring M times. Increase N until the system crashes. How long did it take to start the ring? How long did it take to send a message? When did it crash? He gave graphs comparing Erlang, Java and C#. I decided to compare Pharo. Here is what I got; the creation times are PER PROCESS and the messaging times are PER MESSAGE. first run procs creation/Âµs msg/Âµs 200 0 7.0 500 0 9.7 1000 2 15.4 2000 1 21.6 5000 13 31.5 10000 19.9 40.7 20000 46.5 55.4 50000 130.9 98.0 second run procs creation/Âµs msg/Âµs 200 0.0 7.0 500 0.0 10.12 1000 0.0 16.53 2000 1.5 24.26 5000 12.8 32.15 10000 28.1 39.497 20000 58.15 52.0295 50000 75.1 95.581 third run procs creation/Âµs msg/Âµs 200 0.0 7.0 500 0.0 8.6 1000 2.0 11.0 2000 1.0 16.55 5000 10.2 21.76 10000 12.0 49.57 20000 52.35 65.035 50000 91.76 117.1 Each process is a Pharo object (an instance of ERringElement) that contains a counter, a reference to the next ERringElement, and an "ErlangProcess" that is a Process that contains a reference to an instance of SharedQueue (its "mailbox"). The good news is that up to 50k processes, it didn't crash. But it did run with increasing sloth. I can imagine that the increasing process-creation time is due to beating on the memory manager. But why the increasing message-sending time as the number of processes increases? (Recall that exactly one process is runnable at any given time). I'm wondering if the scheduler is somehow getting overwhelmed by all of the non-runable processes that are blocked on Semaphores in SharedQueue. Any ideas? (My code is on Squeaksource in project Erlang. But be warned that there is a simulation of the Erlang "universal server" in there too. To run this code, look for class ErlangRingTest.)

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[Pharo-project] what are the comments of cull: cull: cull:cull: and friends?
by stephane ducasse Aug. 23, 2011

Aug. 23, 2011

Hi guys I would like to get a better system and I would appreciate some comments for these methods. Stef

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[Pharo-project] SmalltalkImage>>garbageCollectAndReport
by Noury Bouraqadi Aug. 23, 2011

Aug. 23, 2011

Hi, Is this method should be renamed or is the GC call missing? garbageCollectAndReport "Do a garbage collection, and report results to the user." "SmalltalkImage current garbageCollectAndReport" self inform: self bytesLeftString Noury from ESUG @ Edinburgh :-) http://car.mines-douai.fr/noury -- -19Ã¨mes JournÃ©es Francophones sur les SystÃ¨mes Multi-Agents (JFSMAâ11) http://www.univ-valenciennes.fr/congres/jfsma2011/ 17-19 Octobre 2011, Valenciennes, France -5th International Conference on Smalltalk Technologies http://www.fast.org.ar November 3th - 5th, 2011 Universidad Nacional de Quilmes (Argentina)

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[Pharo-project] About squeaksource
by Fabrizio Perin Aug. 23, 2011

Aug. 23, 2011

Hi, As most of you have experienced lately squeaksource have been behaving unreliably, loosing versions and crashing. We discovered that a changed introduced in March, which we were not aware of, was responsible for these inconveniences. We fixed the issue and stabilied squeaksource. We would like to thank Philippe Marschall and Lukas Renggli for their help in fixing this problem. Squeaksource should be as stable and reliable as it has always been. If you find any other problem please do not hesitate to contact us. Fabrizio and Jorge

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Aug. 23, 2011

Hi guys Pharo1.4 migrated its repository to ss3 at ss3.gemstone.com. We migrated the inbox there too, because we want to remove the stress on Squeaksource (related to the automatic build process). We put the SqueakSource/PharoInbox. Dale told us that ss3 is not backup so that we should pay attention. As soon as SmalltalkHub will be usable we will migrate to it. Stef

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