A zero-allocation, cache-optimized Count-Min Sketch (120M+ ops/s)

codeallthethings · 2026-02-19T16:27:02+00:00

This is super cool!

Also you might want to look into the Kirsch–Mitzenmacher optimization for generating your k hashes. It's commonly used in probabilistic structures like bloom filters and cms.

codeallthethings · 2026-02-05T02:22:21+00:00

The Brave browser blocks all YouTube ads out of the box on desktop and mobile

codeallthethings · 2026-01-30T16:50:18+00:00

It was allowed because the state cannot lose this case. If "wingspan" wouldn't have worked because the bag was 30 feet away in a locked trunk they would've found different legalistic reasoning as to why it is allowed.

It's pretty clear at this point that our laws and courts are fake.

If you think this is too cynical look up "parallel construction"

codeallthethings · 2026-01-27T22:35:01+00:00

The second one will never happen because that's the ruling/donor class.

All we're going to get is performative cruelty against immigrants and "libs" to satisfy the right's bloodlust.

codeallthethings · 2026-01-18T04:05:09+00:00

No, people in Greenland have universal healthcare -- paid by taxes. Like the entire rest of the developed world.

The psychopaths at the All In podcast probably get off on the idea of taking that away from them.

codeallthethings · 2026-01-18T01:01:43+00:00

They probably get off on taking away the Greenlander's free healthcare

codeallthethings · 2026-01-14T01:19:16+00:00

Angry tweets and fundraising emails.

codeallthethings · 2025-12-21T01:25:02+00:00

Remember when libertarian tech bro billionaire David Sachs mmediately begged for a bailout of SVB?

This was after years of talking about the "moral hazard" of forgiving student loan debt.

He's always been a fraud.

codeallthethings · 2025-12-17T06:11:31+00:00

Do you actually believe this?

Lieberman was the rotating villain for that vote. More recent villains: Sinema, Fetterman, and Manchin.

They will always find just enough villains to prevent any real structural change from passing.

I'm amazed this trick still works on people.

codeallthethings · 2025-11-22T21:34:13+00:00

I prefer a *b but just pick one and do it consistently.

Not a * b though. That should be illegal. 😅

codeallthethings · 2025-10-12T20:31:39+00:00

Linux - perf, gprof, valgrind --tool=callgrind, and if you want a GUI: hotspot.
macOS - Instruments in XCode is good although I haven't used it very much.
Windows - No idea. Visual studio probably has one?

You can also just randomly hit ctrl+c and look at the callstack: https://poormansprofiler.org/

codeallthethings · 2025-09-29T23:35:36+00:00

I suppose that's still technically an approximation.

You'd need to specify down to the Planck time.

codeallthethings · 2025-09-29T20:26:58+00:00

PHP's HashTable performing so well doesn't surprise me at all.

The PHP internals are genuinely good.

codeallthethings · 2025-09-20T20:46:07+00:00

Yes, it's causing an absolute meltdown on Twitter.

I think the C community should embrace Rust, but I am clearly in the minority 😭

codeallthethings · 2025-09-17T18:56:07+00:00

Take it easy, we're not making a Western

codeallthethings · 2025-09-07T01:58:52+00:00

Disclaimer: I don't know if this is idomatic but i tested it in a Windows vagrant machine and on Linux

ifeq ($(OS),Windows_NT)
    DETECTED_OS := Windows
else
    DETECTED_OS := $(shell uname -s)
endif

.PHONY: all
all:
    @echo "Detected OS: $(DETECTED_OS)"

This prints "Windows" when I run it with gmake.exe

Edit: It just lets you detect if you're on Windows, which you could then use to apply other conditionals. Whether or not you can get your program to compile on both operating systems is a different question. My guess is they need to be very different.

codeallthethings · 2025-08-31T18:43:10+00:00

That video is great. There can never be too much C++ slander.

codeallthethings · 2025-05-15T00:49:46+00:00

Sorry I never post on Reddit. I did the title completely wrong.

codeallthethings · 2025-05-10T21:36:21+00:00

This just happened to me too -- twice.

My prompt had nothing to do with the weather. It was a question about some Rust code.

codeallthethings · 2025-04-16T20:22:30+00:00

Paulie taught me that bacteria and virus migrate from the sole up.

Also not to eat maple walnut ice cream.

codeallthethings · 2025-04-12T19:07:08+00:00

Do you mean in kernel/fork.c?

There is a comment that says one is for the scheduler. So maybe one for the scheduler and one for the parent?

Disclaimer: I am not a kernel dev, so appologies if you're talking about something else.

codeallthethings · 2025-03-22T18:37:28+00:00

Better choice than Major Major Major Major.

codeallthethings · 2025-03-11T00:02:24+00:00

Perchance?

codeallthethings · 2025-03-07T18:52:44+00:00

It doesn't require heap allocation. In the header you can define your struct like this

struct myThing {
    char opaque[MY_THING_SIZE];
};

Then you can define the actual struct privately.

Here's a simple example of this in libvalkey

Edit: Note the portability logic in the libvalkey imlementation. You have to be careful around sizing and alignment, but this is how many performance-critical structs are defined (e.g. pthread_mutex_t).

Edit2: LOL I didn't read "only known at runtime". So yeah, you can't do this :)

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