January 2017 - Pharo-users - lists.pharo.org

Re: [Pharo-users] [Pharo-dev] Call of projects of open-dev lectures
by stepharong Jan. 5, 2017

Jan. 5, 2017

On Thu, 05 Jan 2017 10:50:58 +0100, Hilaire <hilaire(a)drgeo.eu> wrote: > Hi, > > You desscribed a bit the students, I have few more questions : > > What is the background of the students regarding computer science? L3 student (third year) > > How many hours are they supposed to dedicate to the project? 12 * 4 hours. > > Phratch will be a nice project to get student interested by. Thanks I will add it to the list. > > > Hilaire -- Using Opera's mail client: http://www.opera.com/mail/

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Re: [Pharo-users] [Seaside] TTFB, Apache, Seaside Performance Problem
by Sven Van Caekenberghe Jan. 5, 2017

Jan. 5, 2017

I think this has to do with your particular server setup (Windows, Apache on Windows ?), there normally should not be any real difference (caching of DNS results). I am using localhost as upstream server reference everywhere (Linux mostly Nginx). Anyway, it does again show that general system admin and networking knowledge is always crucial and independent of specific application technologies used. BTW, thanks for this conversation, this way we can all learn some more. > On 5 Jan 2017, at 13:10, Sabine Manaa <manaa.sabine(a)gmail.com> wrote: > > http://stackoverflow.com/questions/25199405/localhost-vs-127-0-0-1-performa… > > 2017-01-05 13:24 GMT+01:00 Sabine Manaa <[hidden email]>: > Mariano, no, there is no difference in the response time between localhost and 127.0.0.1 > I entered now the ip of the server there. > > Don't you think that this should be written in the book? > http://book.seaside.st/book/advanced/deployment/deployment-apache/configure… > > > > 2017-01-05 12:58 GMT+01:00 Mariano Martinez Peck [via Smalltalk] <[hidden email]>: > Wow, that's what I call to nail it! hahahaha. > > Norbert, do you have some explanation we could all learn from it? It's something concrete about Apache or is it something as general as resolving localhost could take longer than 127.0.0.1? > > Sabine, do you see a difference in the response time when ping to localhost and 127.0.0.1 ? > > Thanks in advance, > > On Thu, Jan 5, 2017 at 8:47 AM, Sabine Manaa <[hidden email]> wrote: > The problem is solved: I had to replace localhost by 127.0.0.1 > Thanks a lot Norbert Hartl for your advice! > > 2017-01-05 12:25 GMT+01:00 Sabine Manaa [via Smalltalk] <[hidden email]>: > Hi, > > I need the help of the community. > > I am not succeding in making our app faster. > The problem is the Time to first Byte (TTFB). It is always more than one second which is much to much. > We reduced the problem to a problem between apache and pharo/seaside. > > For this, I have a test application which only renders "hello World". So I am sure it is not my code, my database, my css, my js, my ssl.... :-) > > I optimized and learned a lot for my app, but it did not solve the TTFB problem, which costs 1 additional sec for each click of the user which is inaceptable. > > Please follow this tests to see the problem: > > ===>>> Test 1: test.html without Pharo/seaside > https://tools.keycdn.com/performance?url=http://app.spesenfuchs.de/test.html > TTFB in Frankfurt below 10 ms -> this proves that the server and configuration is fast. > > ===>>> Test 2: hello world, simple seaside page > https://tools.keycdn.com/performance?url=app.spesenfuchs.de/hello > TTFB in Frankfurt more than 1 second! -> this proves that it is not my application :-) it is only a hello world seaside page... > > ===>>> Test 3: my login page > https://tools.keycdn.com/performance?url=app.spesenfuchs.de/rka > TTFB in Frankfurt more than 1 second! > > (alternative: enter the urls into https://gtmetrix.com/) > > In Apache, we enabled tracing of the rewrite and this tells me (i assume), that apache makes the rewrite very fast, within the same millisecond :-) > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] init rewrite engine with requested uri /hello > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern '^/rka(.*)$' to uri '/hello' > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern '^/hello(.*)$' to uri '/hello' > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] rewrite '/hello' -> 'http://localhost:8085/HelloWorld/' > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] forcing proxy-throughput with http://localhost:8085/HelloWorld/ > [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace1] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] go-ahead with proxy request proxy:http://localhost:8085/HelloWorld/ [OK] > > So, I assume that there is problem between Apache and Seaside.... > > My questiond are: > what can I do to find the bottleneck? > what is the reason that is so slow? > your help is very appreciated because I have run out of ideas what it could be and I was investigating it several days now. > > Concerning the system: > The server is at Amazon ec2 windows Server 2009 R2 SP1 > The Apache version is 2.4.23 > The configuration of the apache is like this (as described in the seaside book http://book.seaside.st/book/advanced/deployment/deployment-apache/configure…) > > <VirtualHost *:80> > ProxyPreserveHost On > ServerName app.spesenfuchs.de > RewriteEngine On > <Directory "C:\xampp\htdocs"> > Require all granted > </Directory> > DocumentRoot "C:\xampp\htdocs" > RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f > > RewriteRule ^/rka(.*)$ http://localhost:8085/RKA/$1 [proxy,last] > RewriteRule ^/hello(.*)$ http://localhost:8085/HelloWorld/$1 [proxy,last] > </VirtualHost> > > If you reply to this email, your message will be added to the discussion below: > http://forum.world.st/TTFB-Apache-Seaside-Performance-Problem-tp4928842.html > To start a new topic under Seaside General, email [hidden email] > To unsubscribe from Seaside, click here. > NAML > > > View this message in context: Re: TTFB, Apache, Seaside Performance Problem > Sent from the Seaside General mailing list archive at Nabble.com. > > _______________________________________________ > seaside mailing list > [hidden email] > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside > > > > > -- > Mariano > http://marianopeck.wordpress.com > > _______________________________________________ > seaside mailing list > [hidden email] > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside > > > If you reply to this email, your message will be added to the discussion below: > http://forum.world.st/TTFB-Apache-Seaside-Performance-Problem-tp4928842p492… > To start a new topic under Seaside General, email [hidden email] > To unsubscribe from TTFB, Apache, Seaside Performance Problem, click here. > NAML > > > > View this message in context: Re: TTFB, Apache, Seaside Performance Problem > Sent from the Seaside General mailing list archive at Nabble.com. > _______________________________________________ > seaside mailing list > seaside(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

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Mouse events in FastTableModel subclass [Spec]
by Matteo Jan. 5, 2017

Jan. 5, 2017

Hi, I've created a PictureListModel class to manage a list of pictures. It's a subclass FastTableModel and its adapter (MorphicPictureListAdapter) is a subclass of MorphicFastTableAdapter. The widget works correctly: it shows a scrollable list of pictures. The problem is that it cannot handle âclickâ and âdouble clicksâ events, i.e. double clicking on a list item does nothing, even setting "handlesDoubleClick:" to true. I've tried to figure out the mechanism, looking into the FastTableModel, its Morphic adapter and reading the "BuildingUIWithSpec" doc, but I didn't get it. Where could I find some hint to manage "click" and "double click" events in FastTableModel? Thanks, Matteo

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TTFB, Apache, Seaside Performance Problem
by Sabine Manaa Jan. 5, 2017

Jan. 5, 2017

Hi, I need the help of the community. I am not succeding in making our app faster. The problem is the Time to first Byte (TTFB). It is always more than one second which is much to much. We reduced the problem to a *problem between apache and pharo/seaside*. For this, I have a test application which only renders "hello World". So I am sure it is not my code, my database, my css, my js, my ssl.... :-) I optimized and learned a lot for my app, but it did not solve the TTFB problem, which costs 1 additional sec for each click of the user which is inaceptable. Please follow this tests to see the problem: ===>>> Test 1: test.html without Pharo/seaside https://tools.keycdn.com/performance?url=http://app.spesenfuchs.de/test.html TTFB in Frankfurt below 10 ms -> this proves that the server and configuration is fast. ===>>> Test 2: hello world, simple seaside page https://tools.keycdn.com/performance?url=app.spesenfuchs.de/hello TTFB in Frankfurt more than 1 second! -> this proves that it is not my application :-) it is only a hello world seaside page... ===>>> Test 3: my login page https://tools.keycdn.com/performance?url=app.spesenfuchs.de/rka TTFB in Frankfurt more than 1 second! (alternative: enter the urls into https://gtmetrix.com/) In Apache, we enabled tracing of the rewrite and this tells me (i assume), that apache makes the rewrite very fast, within the same millisecond :-) [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] init rewrite engine with requested uri /hello [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern '^/rka(.*)$' to uri '/hello' [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace3] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] applying pattern '^/hello(.*)$' to uri '/hello' [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] rewrite '/hello' -> 'http://localhost:8085/HelloWorld/' [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace2] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] forcing proxy-throughput with http://localhost:8085/HelloWorld/ [Thu Jan 05 12:14:35.243400 2017] [rewrite:trace1] [pid 1288:tid 1692] mod_rewrite.c(477): [client 91.89.219.232:52272] 91.89.219.232 - - [app.spesenfuchs.de/sid#66c848][rid#20bc4c8/initial] go-ahead with proxy request proxy:http://localhost:8085/HelloWorld/ [OK] So, I assume that there is problem between Apache and Seaside.... My questiond are: what can I do to find the bottleneck? what is the reason that is so slow? your help is very appreciated because I have run out of ideas what it could be and I was investigating it several days now. Concerning the system: The server is at Amazon ec2 windows Server 2009 R2 SP1 The Apache version is 2.4.23 The configuration of the apache is like this (as described in the seaside book http://book.seaside.st/book/advanced/deployment/deployment-apache/configure…) <VirtualHost *:80> ProxyPreserveHost On ServerName app.spesenfuchs.de RewriteEngine On <Directory "C:\xampp\htdocs"> Require all granted </Directory> DocumentRoot "C:\xampp\htdocs" RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f RewriteRule ^/rka(.*)$ http://localhost:8085/RKA/$1 [proxy,last] RewriteRule ^/hello(.*)$ http://localhost:8085/HelloWorld/$1 [proxy,last] </VirtualHost> -- View this message in context: http://forum.world.st/TTFB-Apache-Seaside-Performance-Problem-tp4928839.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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improving add parameter refactoring
by Stephane Ducasse Jan. 5, 2017

Jan. 5, 2017

Hi john I'm facing the following situation and I was wondering if a simple heuristic could not improve the situation (where edge cases will always be a problem). I got a hierarchy of expressions implementing evaluate and I wanted to add a parameter (the binding). So Add Parameter worked but broke evaluate recursive methods. Here is a part of the book I'm writing [[[ EConstant >> testEvaluate self assert:(EConstant new value: 5) evaluate equals: 5 ]]] is transformed as follows: [[[ EConstant >> testEvaluate self assert: ((EConstant new value: 5) evaluateWith: Dictionary new) equals: 5 ]]] Your tests should nearly all pass except the ones on variables. Why do they fail? Because the refactoring transformed message sends ==evaluate== but ==evaluateWith: Dictionary new== and this even in methods ==evaluate==. [[[ EAddition >> evaluateWith: anObject ^ (right evaluateWith: Dictionary new) + (left evaluateWith: Dictionary new) ]]] [[[ EAddition >> evaluateWith: anObject ^ (right evaluateWith: anObject) + (left evaluateWith: anObject) ]]] And I was wondering if a good heuristic would be to change the parameter. Now I have the impression that the refactoring is done it two passes. So this is more tricky than it looks. Stef

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Call of projects of open-dev lectures
by stepharong Jan. 4, 2017

Jan. 4, 2017

Hi We are organising a lecture where students should - learn pharo - learn how to communicate with open source community - learn how to reverse engineer, fix bugs.... They should work by 3/4. We are looking for projects that would like to accept - propose some bugs to be fixed - to communicate with newbies and from time to time I was thinking about - MDL - Roassal - Moose ? - Pillar ? but nobody beside me and I do not have the time - DRGeoII - Telescope - Artefact - Scale - Ecstatic So if you have a project and you want to participate. We would like to have - web page? - mailing-list - bug trackers/todo? Stef -- Using Opera's mail client: http://www.opera.com/mail/

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Creating a zip file without storing relative paths of file folders
by Offray Vladimir Luna CÃ¡rdenas Jan. 4, 2017

Jan. 4, 2017

Hi :-), I'm creating a Grafoscopio interactive notebook for learning Lua and making a small video game with the LÃVE 2D game engine, following the excellent SheepPollution video series[1]. My first video game is now working (the old classic Pong) and the notebook contains actionable web links, text notes and code playgrounds for making clerical work (creating the initial empty .lua files, downloading the libraries, packaging all as zip files). [1] https://www.youtube.com/watch?v=TUPbSJ5wF0k&list=PLM5EvDHhpyTcThnWfeP1459Ke… Precisely, while trying to package the game as a zip file I'm having the problem that files are archived with their relative path, and so, they're in a zip with a lot of nested folders (like in my hard disk) instead of being just zipped in the root of the zip file. The script I'm using for that is at [2]. There is any way to tell ZipArchive or ZipNewFileMember that members are not stored with their full path? [2] http://ws.stfx.eu/OOW0539JDHH2 Thanks, Offray Ps: Learning Lua has been a pleasant experience now that I have the Pharo/Smalltalk foundation and interactive notebooks, powered by it, and the Lua language is pretty neat also.

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Re: [Pharo-users] selectAllSortBy: usage
by Norbert Hartl Jan. 4, 2017

Jan. 4, 2017

Try selectAllSortBy: { 'date' -> 1 . 'time' -> 1 } asDictionary where 1 means ascending and -1 means descending Norbert > Am 03.01.2017 um 19:56 schrieb Asbath Sama biyalou <asamabiyalou(a)yahoo.com>: > > Hi everybody. I have an object and I want to select all of them sorting > them by date (Date) and hour(Time). But I don't know to tell that > condition to selectAllSortBy: I tried some things but no result. I am > using Voyage with mongoDB. > > Thanks > > Asbath > >

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Slashdot Submission
by horrido Jan. 3, 2017

Jan. 3, 2017

Slashdot submission <https://slashdot.org/submission/6609431/techbeacon-article-is-making-a-brea…> I'm trying to get my TechBeacon article on Slashdot. If I'm successful, this could be the BIGGEST win in my Smalltalk campaign, my Battle of Austerlitz <https://www.britannica.com/event/Battle-of-Austerlitz> . Please, please, please, upvote the submission. Slashdot has to be convinced to publish my story and *they look at the number of upvotes*. Thanks, Richard -- View this message in context: http://forum.world.st/Slashdot-Submission-tp4928235.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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selectAllSortBy: usage
by Asbath Sama biyalou Jan. 3, 2017

Jan. 3, 2017

Hi everybody. I have an object and I want to select all of them sorting them by date (Date) and hour(Time). But I don't know to tell that condition to selectAllSortBy: I tried some things but no result. I am using Voyage with mongoDB. Thanks Asbath

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