Squeak-dev May 2005

squeak-dev@lists.squeakfoundation.org

153 participants
243 discussions

Reality speed check. isNil vs. == nil is half fast.
by Peace Jerome 02 May '05

02 May '05

Some comments andreas made got me curious as to how much speed was given up for correctness. So I did a little test. foo isNil vs. foo == nil . My result seem to show that former is half as fast as the latter. After I realized I had to do a control to eliminate the time spent looping from the comparison. And I repeated the test ten times in each loop so the looping time didn't swamp the out come. 1000000 timesRepeat: [. . . . . . . . . ]] For a G3 imac running under OS9.1 my results were control: 900 isNil 3000 == nil 2000 Once the control was subtracted out the time factor was about 2::1 regardless of the value of foo. If you want to try this on your system the text of the test was: [ { nil . true . false . Morph new } collect: [ :foo | { [1000000 timesRepeat: [. . . . . . . . . ]] . [1000000 timesRepeat: [foo isNil . foo isNil . foo isNil . foo isNil . foo isNil . foo isNil . foo isNil . foo isNil . foo isNil . foo isNil]] . [1000000 timesRepeat: [ foo == nil . foo == nil . foo == nil . foo == nil . foo == nil . foo == nil . foo == nil . foo == nil . foo == nil]] } collect: [ :testBlock | testBlock timeToRun ] ] ] value collect: [ :results | results second - results first / (results third - results first ) asFloat ] and my results for this example were: #(2.03679245283019 2.051643192488263 2.058878504672897 2.06578947368421) This is not a conclusive indication of why squeak is now slower. It is an indication that more examination will be useful. A lot of inner loop stuff was changed without regard for the speed impact. Yours in service, Jerome Peace __________________________________ Do you Yahoo!? Make Yahoo! your home page http://www.yahoo.com/r/hs

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[Fwd: asked for ISP donations?]
by Ken Causey 02 May '05

02 May '05

Lex suggested I forward this to 'whoever is considering these issues' and that seems to be any member of the community who cares to do so and so I'm forwarding it to the main list. There are multiple issues here and I'm currently of the opinion that a commercial box, as we have been discussing, is probably preferable. One issue in particular that occurs to me is whether or not any university or other such institution is likely to be comfortable with users that have no affiliation with the organization having super user access to a box on their network. Another thought is that with the commercial server funded by voluntary donations we are more easily able to share the responsibility for maintaining the server. In the voluntary hosting model a lot of the responsibility ends up on the hosting volunteer(s) and is very difficult to shift if needed. I have some other thoughts but how about we first see whether or not anyone even can offer such hosting. Ken -------- Forwarded Message -------- From: Lex Spoon <lex(a)cc.gatech.edu> To: Ken Causey <ken(a)kencausey.com> Subject: asked for ISP donations? Date: Mon, 2 May 2005 09:11:35 -0400 Ken, and whoever is working on this, has anyone asked whether a notable Squeaker can donate ISP support? Have you contacted the Collaborative Software Lab that hosts the swiki, or anyone at HP where Ian Piumarta hosts his Squeak/Unix page? Maybe someone at Berne? Maybe even a post to squeak-dev politely asking if anyone can help out? If there is no existing way to host Squeak's servers, then your plan sounds good and well considered, but I am wondering if all bases have been covered? Feel free to forward this message to whoever is considering these issues. -Lex

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primitiveFileSize on mac/unix
by Avi Bryant 02 May '05

02 May '05

I think this may have come up before, but: on the Unix or Mac (Carbon) VMs, a FileStream will always return the #size it had when it was opened, or the last time that FileStream instance was written to - it doesn't notice if some other process or even some other FileStream instance appends to the file. It will happily read those bytes, however, which means that it's possible for "file position > file size and: [file next notNil]" to be true, which seems rather inconsistent. Right now the only way to find out the true size of a file is to open a new FileStream on it, which is a pretty expensive way to do it. Is there any reason it has to be this way? Is there any chance we can fix it? Avi

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truncate fails on unix squeak (on mac)
by Avi Bryant 02 May '05

02 May '05

While I'm asking about file primitives: why does #truncate: always give a prim failure on the unix VM (at least on Mac OS X)? I've tested this with both 3.6-3 and 3.7b-5. Avi

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implementation of a IFFT in Squak for a vocoder
by Cornelius Huber 02 May '05

02 May '05

Hi, I am currently working on squeak's audio capabilities. I have tried out some of the recording, playback and synthesis capabilities. Right now, I would like to build a vocoder using the FFT. The first step is to decode both input signals using the FFT and analyzing it's frequency bands. I found that this is somewhat already implemented in the class PhonemeRecognizerMorph. Now I need to modulate the second signal with the frequencies from the first signal, using an IFFT. I am not quite sure how to implement that. Can anybody help me implementing the code for a IFFT or possibly point to somewhere, where it already might be implemented? Thanks! Corny

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Squeak People posting summary
by cg＠cdegroot.com 02 May '05

02 May '05

Below are the most recent 5 articles that were posted on Squeak People (http://people.squeakfoundation.org/). Apart from the articles, you will find people's diary entries there, and an overview of the Squeak community: who is doing what, people's "standing", etcetera. If you don't have an account, please join - we're interested in getting to know you better! This message is posted automatically every week by a dirty shell script. _________________________________________________________________ Date: 2005-04-10 15:53:45 Author: lexspoon Title: Debian's Constitution How can a thousand developers, without being paid, each pursuing their own interests, funnel their energy into creating a system that is coherent, that stays malleable, and that provides useful compute power to tens of thousands of users? How can we assemble Squeak images that Just Work for our users? How can we provide a library of packages which load and work the first time, no matter the version of Squeak? It's a tough question with no simple answer. Our first try won't be perfect, and instead we should expect to grow the organization over time. But it's never too soon to start. This article kicks off the discussion by looking at a famous existing bazaar, [1]the Debian project. As a timely coincidence, they are just wrapping up their [2]2005 election for project leader. _________________________________________________________________ Date: 2005-02-20 21:46:55 Author: lexspoon Title: Squeak as a Commons Before we can organize Squeak, we must answer: "What is Squeak?" This article defines Squeak as a commons where many individual projects collaborate. The article sketches some of the subgroups using Squeak, and proposes an organizational structure based around giving representation to all of these subgroups. _________________________________________________________________ Date: 2005-01-27 15:49:25 Author: gokr Title: Taming the translation beast! Now - I have just started figuring out how to translate my [3]Homepage Builder application to english and of course ended up digging into the translation stuff. This is a short (well, kinda) report on what I found, how to use what we have, and what I think we need to fix. _________________________________________________________________ Date: 2005-01-10 04:23:15 Author: elvislives Title: squeak logo lookalike Hi, _________________________________________________________________ Date: 2004-12-30 16:37:02 Author: jj Title: Boosting Squeak: RockSolid images I have read the "rant" and "unrant" subject with a mix of uneasiness (embarrassment) and fear. The "Rant" thread began on the 15th of december 2004, and produced a lot of discussion. I will not summarize the thread, because a lot of people read it. Instead, I will go forward and try to find a pragmatic and constructive of helping the community (and yes, I am also very bold and handosome :) << ironic comment). References 1. http://www.debian.org/ 2. http://www.nl.debian.org/vote/2005/vote_001 3. http://www.bluefish.se/english/hemsidebyggaren.html --- (end of posting. Thank you for your patience)

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OrderedCollection>before:ifAbsent:
by Jim Menard 02 May '05

02 May '05

The comment for OrderedCollection>before:ifAbsent: states, in part, "Answer the result of evaluating the exceptionBlock if ... there are no elements before it." The code, however, performs self errorFirstObject: target if the object is the first element of the collection. Which should be changed: the code or the comment? Jim -- Jim Menard, jimm(a)io.com, http://www.io.com/~jimm "Brought to you again by the Department of Redundancy Department." -- Firesign Theatre

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Re: [ENH] icsMimeTypeAddition ([closed] on Mantis ID 0001134)
by Steven Elkins 02 May '05

02 May '05

Thank you for your report. I have transferred your report to Squeak's Mantis Database and you can followup on the issue if desired by going to http://bugs.impara.de/view.php?id=1134 . In the future please report new issues on Squeak's Mantis Database at http://bugs.impara.de/ . Thanks! On 4/30/05, franco2(a)uiuc.edu <franco2(a)uiuc.edu> wrote: > from preamble: > > "Change Set: icsMimeTypeAddition > Date: 30 April 2005 > Author: Adam Franco > > Added MimeType entry for iCal *.ics files, text/calendar."! > > > > > > > -- How wonderful it is that nobody need wait a single moment before starting to improve the world. -- Anne Frank Paradise is exactly where you are right now...only much, much better. -- Laurie Anderson

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Re: [FIX] MimeTypeFix ([closed] on Mantis ID 0001133)
by Steven Elkins 02 May '05

02 May '05

Thank you for your report. I have transfered your report to Squeak's Mantis Database and you can followup on the issue if desired by going to http://bugs.impara.de/view.php?id=1133 . In the future please report new issues on Squeak's Mantis Database at http://bugs.impara.de/ . Thanks! On 4/30/05, franco2(a)uiuc.edu <franco2(a)uiuc.edu> wrote: > from preamble: > > "Change Set: MimeTypeFix > Date: 30 April 2005 > Author: Adam Franco > > FileUrl was not getting the MimeType set when querying MimeDocument to > guess the type. This was due to the type temp-variable not being set > with the result of MIMEDocument guessTypeFromName:"! > > > > > > > -- How wonderful it is that nobody need wait a single moment before starting to improve the world. -- Anne Frank Paradise is exactly where you are right now...only much, much better. -- Laurie Anderson

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[FIX] ScamperFix
by karl.ramberg＠chello.se 01 May '05

01 May '05

from preamble: "Change Set: ScamperFix Date: 25 April 2005 Author: Karl Ramberg Scrollbars popped up in some fields and messed up the layout. Fixed"!

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