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Programming Leftovers

Submitted by Roy Schestowitz on Monday 5th of July 2021 08:39:57 AM Filed under
Development
  • Things I wish Git had: Commit groups

    You know the “group” facility of vector graphics programs? You draw a couple of shapes, you group them together, and then you can apply transformations to the entire group at once, operating on it as if it were an atomic thing. But when need arises, you can “ungroup” it and look deeper.

    That’s because sometimes there’s a need to have a “high-level” view of things, and sometimes you need to delve deeper. Each of these needs is valid. Each is prompted by different circumstances that we all encounter.

    I’d love to see that same idea applied to Git commits. In Git, a commit group might just be a named and annotated range of commits: feature-a might be the same as 5d64b71..3db02d3. Every Git command that currently accepts commit ranges could accept group names. I envision groups to have descriptions, so that git log, git blame, etc could take --grouped or --ungrouped options and act appropriately.

  • Jussi Pakkanen: Looking at the performance of Refterm

    Recently a known strong-opinion-holder Casey Muratori wrote a reference implementation for a new fast terminal renderer. The goal is (as far as I can tell) to implement the same functionality as existing terminals using a lot less resources.

    [...]

    The app uses 0.5% of CPU and a whopping 14% of GPU just to display a blinking cursor. This could be said to be not particularly resource efficient. This is probably due to the fact that there is no rate limiter (or VSYNC) so the app just spams the system all the time. The true resource usage can't be meaningfully compared until this is fixed.

    What can be measured, though, is memory usage. As can be seen in the image [1] the Refterm application uses 351 MB of memory when idle (the test war run using a 4k monitor). Based on discussions on the Internet, an acceptable amount of memory usage for a terminal is around 10-20 MB. Refterm uses 10x as much. In fact, as you can tell, running two instances of Refterm takes more memory than a fully blown Firefox with tens of open tabs. For comparison I also tested the Spotify app which is implemented in Electron. When playing music it only took ~150 MB, less than half of an idling Refterm.

  • TWC 119: Task #1, Swap Nibbles & Task #2, Sequence without 1-on-1

    Hello everyone, I'm back after a year's absence, good to see everything is going as strong as ever. I have some extra time this weekend, so thought I'd try my hand at an answer again.

    But, oh golly, looking back over my earlier posts on earlier problems was just painful--too many details! Going forward I'll just broad-brush things (and I mean it this time). If anyone has a question about details, then ask about them in the comments.

    The swap nibbles problem is equivalent to a "swap hex-chars problem" and since we have the bigint module then any hex string can be represented by an integer. When a little investigation brought up that every bigint object has an as_hex() method, I found the restriction to positive integers less than 255 too restrictive: I decided to do them all! (Well, not quite all, since there are an infinite number of integers, but you know what I mean.)

  • Monthly Report - June

    As you all know, I have recently started taking part in the weekly challenge again. I have always complained about the lack of time doing things I always wanted to do. But then it doesn't stop me taking up new projects. I have to learn how to prioritize projects. May be one day, I will get there. Right now I am actively working on 2 new projects simultaneously. First is preparing the talk for the upcoming Raku Online Conference. It is going to be my personal journey to Raku. And the second is very close to my heart, working on my first book about Perl in association with Dave Cross.

    [...]

    With regard to my new job at Oleeo, I have finally got to do some Perl coding at last. I must say it made me so happy. Prior to this I got my hand dirty with Ansible for the first time. It was good learning experience. I really enjoyed it, thanks to all the support I got from fellow colleagues. Although my first Perl task is not too complex but it got me to look at the database closely. Thanks to the weekly challenge, I never loose the touch with Perl and all its glory. Also I am never short of ideas when dealing with any task, thanks to Team PWC for all the smartest solutions. Having done the weekly challenge, my confidence level is always high when it comes to Perl. I remember an incident, about 15 odd years ago, team lead would always try to put me down complaining about my Perl knowledge. It did affect my confidence to some extent but luckily I left the company soon after. Ever since, I have been lucky to have very supportive and encouraging colleagues. Oleeo too has bunch of familiar faces that can easily fit into my category of best friends.

»

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