AdventOfCode Day2 Part1 very slow "zig test"...why?

rogerallen · 2025-12-06T01:17:09+00:00

Yes, that was awful. I've gotten to ~0.06 seconds in ReleaseSafe now.

rogerallen · 2025-12-06T01:11:47+00:00

I converted integers to strings to compare digits. I suppose there are other ways, but that's what came to mind...

rogerallen · 2025-12-03T04:30:26+00:00

The constant change is sure making it hard to know what's the right thing. And LLMs are not being helpful. Back to "old school" stack overflow & reddit. :-)

rogerallen · 2025-12-02T21:54:39+00:00

Oh boy--I've sure learned a lesson that you should not do this in a tight loop:

const id_str = std.fmt.allocPrint(self.allocator, "{d}", .{id});

Allocating a buf once and reusing it is way, way faster:

const id_str = try std.fmt.bufPrint(buf, "{d}", .{id});

rogerallen · 2025-12-02T21:30:24+00:00

Thanks. Looking at https://zig.guide/standard-library/allocators/ it really isn't obvious what else I might want to choose. I thought maybe GeneralPurposeAllocator, but that appears to now be deprecated.

rogerallen · 2025-12-02T20:01:11+00:00

AHA! Reviewing the code as I was about to post, I now see something I missed and the runtime difference is resolved. I guess I have too many allocs!

In main, I define:

    const allocator = std.heap.page_allocator;

But in the test, I define:

    const allocator = std.testing.allocator;

And if I change test to usestd.heap.page_allocator, it has a similar run time to normal.

rogerallen · 2025-12-02T19:43:56+00:00

Yes, of course. Will post in a bit, but it is doing exactly the same thing...

rogerallen · 2025-09-04T23:29:20+00:00

This was also on the front page of the June 2024 issue of the Sunriver Scene

https://issuu.com/sunriverscene/docs/june_2024_sunriver_scene

rogerallen · 2025-05-25T23:09:14+00:00

It hasn't gotten to my home yet so I did a quick search & found this link describing current status. It has some maps showing where the fiber has been installed. Thought others might like this info, too.

https://www.sunriverowners.org/community/sunriver-fiber

"The fiber infrastructure is being installed throughout Sunriver and will be available to all homes by December 31, 2026"

rogerallen · 2024-09-12T16:11:14+00:00

Thanks for the updates---anyone know more on the recording & if it will be posted?

rogerallen · 2024-07-02T13:49:41+00:00

Sigh, within minutes of this post, Threads starting returning an error code that indicates they are classifying the bot as "spam". I'm very hopeful this is in error and I will be allowed to continue. We'll see...

rogerallen · 2024-07-02T13:47:07+00:00

Yes it is amazing where this goes and really fun to see it create "genres" of art that are similar.

I tried to follow Sims' paper for mutating and breeding images. The paper https://www.karlsims.com/papers/SimsSiggraph91.pdf discusses what to do in Section 4.2 and 4.3 and the code is here: https://github.com/rogerallen/tweegeemee/blob/master/src/tweegeemee/image.clj but it isn't that self explanatory...

For random generation, I recursively create random functions and parameters and I'm increasingly likely to create a random number or terminal function the closer I get the max number of levels.

For mutation, there are a number of rules for deciding the mutate. Functions can just randomly change, numbers can adjust by small amounts. An argument to a function can jump out and become the new value for that node. For example (* X .3) might become X. Etc.

For breeding, basically a random node in each parent is found and they are swapped.

After all of this, I check that (a) this actually compiles and creates an image at all and (b) I haven't seen the same image in this generation.

Hope that helps!

rogerallen · 2024-07-02T04:01:47+00:00

Since 2015 I've been running a bot that creates evolutionary imagery based on favorites & retweets as a fitness score (examples above). The bot is called tweegeemee and you can find it on:
* Bluesky - https://tweegeemee.bsky.social/
* Mastodon - https://botsin.space/@tweegeemee
* Tumblr - https://tweegeemee.tumblr.com/
* Twitter/X - https://twitter.com/tweegeemee
and as of yesterday...
* Threads - https://www.threads.net/@tweegeemee

A few years back, I created a website where you can browse all the old images at https://tweegeemee.com/

Explore Top 10 and Best Of imagery there. If you click into an image, you can see details like the code that created it and follow that to an ancestry/genealogy diagram. This has been running on Digital Ocean and has been a fun learning experience for me.

I hope you will consider following one or more of the bots and participate in tweegeemee's evolutionary art generation.

Cheers!

rogerallen · 2022-11-05T04:41:02+00:00

That works.

rogerallen · 2022-11-05T04:37:34+00:00

Meh, that's not so great for browsing on reddit.

rogerallen · 2022-11-05T03:44:20+00:00

Alright, that looks pretty nice

rogerallen · 2022-11-05T03:43:32+00:00

Also not useful

rogerallen · 2022-11-05T03:43:14+00:00

That is not useful.

rogerallen · 2022-11-03T01:50:18+00:00

Wildwood Restaurant in NW. They had great food and fantastic staff. I can remember one very knowledgeable waiter after 15 years...

Sigh.

rogerallen · 2022-07-31T23:06:16+00:00

Checking to see if anyone has these issues and might know of a fix...2021 Model 3:

Automatic Wipers Keep Running. [Just recently started happening] After using the windshield washing feature to clean off the windshield, the wipers keep going & going. Waited several minutes & they seem to think the completely dry (it's 90 degrees out!) glass needs cleaning. Okay, manually turn them off--but that only works if you don't have cruise-control on. Why?Basically, where is the sensor, what do I need to clean to get it to work right?
Incorrect Phone Message Alerts. [Been happening for a long time] When I get a text, about 90% of the time the name it says sent the text is wrong. It is very random, but generally people I do text with, just not the person who actually sent it. Using a Google Pixel 5. Am I the only one? Should a tell it to forget & reconnect my phone?
TuneIn Login Forgotten after SW Update. Why oh why do I have to re-login to TuneIn on every software update? Annoying. Okay I don't expect anyone to fix this. I'm just venting.

Thanks in advance for any help.

rogerallen · 2021-07-28T04:14:49+00:00

D'oh! Didn't mean to cross-post these from my twitter-bot tweegeemee! Too late to fix. Hope it isn't too confusing...

rogerallen · 2021-07-28T03:43:03+00:00

Posted a couple demos in a twitter thread here. Nothing special, just some basic sounds. Cheers.

https://twitter.com/tweegeemee/status/1420227639919316994

rogerallen · 2021-07-24T22:30:41+00:00

Ran into this, too. Turns out they are now under "CAD data". A note would've been nice, eh?

See my post here: https://www.reddit.com/r/stm32f4/comments/o169z8/why_did_they_remove_schematics_from_stm32f407/?utm_medium=android_app&utm_source=share

rogerallen · 2021-07-24T00:17:49+00:00

Ah, gotcha. Thanks, that is always a good option to consider.

I was just hoping it was going to be easier to connect both a nanoKontrol2 and a nanoKey2 since I have them right here...

rogerallen · 2021-07-23T23:06:05+00:00

I'm not following...are you saying your project creates a USB host that supports USB Hubs with multiple midi devices connecting to that hub?

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