Re: [racket-users] looking for advice on a web background process manager
On 2021-12-30 21:33, 'Wayne Harris' via Racket Users wrote: I'm considering writing a manager for background processes --- such as send a batch of e-mail or other process that takes a while to finish --- for a web system. I see the challenge here as just writing something that will look like a very basic UNIX shell --- so I'll call it ``web-api-shell'' from now on. (``Web'' because it will be used by a web system through some HTTP API.) This thing has to be flawless. I'm looking for design principles and advice. [...] Have you looked at existing task queues and message brokers? I guess they can already give you a part of the robustness you're looking for. It would be a pity to reinvent the wheel, especially since it will probably be quite difficult and time-consuming to implement this robustness yourself. But it might as well be that I misunderstand your requirements. :-) Stefan -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/ddeb9170-6273-34be-ec6d-7edc8b3a4146%40sschwarzer.net.
[racket-users] Here's a makefile to build Racket binaries for different platforms
With the cross compilation now working under Racket 8.2, I can offer a Makefile to build binaries for different platforms in a Linux build environment on Sourcehut. Being able to cross-compile is important in this case because Sourcehut doesn't have Windows or Mac OS X build environments. https://git.sr.ht/~sschwarzer/sudoku-solver/tree/main/item/Makefile Raw download: https://git.sr.ht/~sschwarzer/sudoku-solver/blob/main/Makefile Build log example: https://builds.sr.ht/~sschwarzer/job/547472 The build instructions in the makefile are kind of straightforward, but maybe it saves someone a bit head-scratching to get some of the details right. :-) What might also be interesting is the use of `sed` to patch the version in the `info.rkt` file and to work around the requirement of static artifact paths in `.build.yml` files. I patch the version part in the artifact paths before `git push`, so I can create build files which contain the version number. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/695dcf19-52b8-8349-f611-3b0c1ad46879%40sschwarzer.net.
Re: [racket-users] Speeding up the conversion of flvectors to string
On 2021-06-28 21:18, Alessandro Motta wrote:> One thing that is still puzzling / worrying me: I completely failed to > identify the actual bottleneck when profiling the code. > > Did I simply misinterpret the profiling output / flame graph? Or is the > problem rather that memory allocations and garbage collection are not > tracked by the profiler? Some things that might help (at least they helped me :-) ) ... - Use the `profile-thunk` function described at https://docs.racket-lang.org/profile/ (most likely that's how you got your profile data to begin with). - Use the `errortrace` option, i. e. run the instrumented program with `racket -l errortrace -t program.rkt`. The errortrace functionality is described as: When using Errortrace, profiles are more precise and more fine-grained (expression-level instead of function-level) but profiling has higher overhead and recompilation may be necessary. - Note the remark about recompilation. It took me a bit to realize that I had to delete the `.zo` files. :-) In practice, I remove the `compiled` folders for the program I want to run. If you don't remove the compiled code, the old code - without errortrace information - will be used, but as far as I remember you'll get no error message or warning. - There's also an option for the sample interval, so you can lower it to get finer-grained measurements. I don't find this now. Maybe someone else can point to more information. - Learn to read the text output of the profiler as described under https://docs.racket-lang.org/profile/#%28part._.Textual_.Rendering%29 Especially the distinction between the times with and without calls to nested functions is helpful. The profiler output may seem a bit overwhelming first, but with some time and experimentation it becomes better (like with so many things regarding Racket ;-) ). Stefan -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/08b4bcb1-145f-0824-55c0-05bf6641bf06%40sschwarzer.net.
Re: [racket-users] Trying to specify resize-border for instance of dialog
On 2021-06-26 01:56, Don Green wrote: > When I specify as follows: > > (define dialog2 (new dialog% > (label "Get-Prototype-dialog") > (style resize-border) > )) > > Returned error: > resize-border: unbound identifier in: resize-border I guess you want 'resize-border (as a symbol). :-) -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/7c800f58-054c-5711-0308-b6d77e526fb3%40sschwarzer.net.
