lewurm (u/lewurm) - Readit News

lewurm commented on Quake 3 Source Code Review: Network Model (2012) fabiensanglard.net/quake3... · Posted by u/mmh0000

Eh. While not great given bandwidth availability at the time, most Quake hosted servers has excellent ping and latency for most people domestically. The main issues were honestly people hosting from their local machines across the world, which obviously had very poor results.

I am a former Quake 3 champion, have a lot of experience dealing with Quake 3 servers :)

lewurm · 9 months ago

What is a former q3 champion doing these days? I'm genuinely curious. Since you are on hacker news I assume you do something with software. Any skills that you picked up back then that are useful today?

lewurm commented on AMD's Turin: 5th Gen EPYC Launched chipsandcheese.com/p/amds... · Posted by u/zdw

hedora · a year ago

I wonder if you can boot it without populating any DRAM sockets.

lewurm · a year ago

Firmware is using cache as RAM (e.g. https://www.coreboot.org/images/6/6c/LBCar.pdf) to do early init, like DRAM training. I guess later things in the boot chain rely on DRAM being set up probably though.

lewurm commented on Arm64EC – Build and port apps for native performance on Arm learn.microsoft.com/en-us... · Posted by u/heinrich5991

jart · a year ago

Wow! This might actually make it possible for Actually Portable Executable to support running on Windows ARM. I'm already putting the ARM code inside all my binaries. There's just never been a way to encode that in the PE headers. But if my emulated WinMain() function for x86-64 could detect that it's being emulated and then simply ask a WIN32 API to jump to the ARM entrypoint instead, it'd be the perfect solution to my problems. I actually think I'm going to rush out and buy a Windows ARM computer right now.

lewurm · a year ago

> I actually think I'm going to rush out and buy a Windows ARM computer right now.

If you have an Apple Silicon machine you can run a Windows Insider build via UTM in a VM.

lewurm commented on Show HN: I Built a Java IDE for iPad · Posted by u/_38ua

robrtsql · a year ago

The app is monetized by limiting the number of “runs” you can do per month. Based on iOS limitations I think we can assume this means the compilation is done on a remote server.

EDIT: nevermind! I tried running a program with airplane mode on and it still worked. Now I’m really interested to hear how this was accomplished.

lewurm · a year ago

Probably a OpenJDK Zero VM build. That's a configuration without JIT or template interpreter, but a "plain" C++ switch dispatch interpreter that requires no runtime code generation.

lewurm commented on Notes on debugging HotSpot's JIT compilation (2023) jornvernee.github.io/hots... · Posted by u/lichtenberger

comonoid · a year ago

Well, inlining is not necessary, good old interprocedure analysis would resolve it too.

lewurm · a year ago

Sure, but neither javac (the Java to bytecode compiler) or HotSpot are doing that. The former tries to preserve as much as possible, and for the latter interprocedure analysis is too costly at run-time.

lewurm commented on Cortex X2: ARM aims high chipsandcheese.com/2023/1... · Posted by u/chmaynard

geek_at · 2 years ago

Are there any viable ARM Servers available in a homelab price range? Every time I look I only see the 2000$ enterprise 2U servers. I have outgrown the Raspberry Pis but still love the idea of moving my homelab to ARM

lewurm · 2 years ago

Mac Mini running Asahi Linux might be an option

lewurm commented on Zig is now self–hosted by default github.com/ziglang/zig/wi... · Posted by u/BratishkaErik

AndyKelley · 3 years ago

To clarify what this means, since things can get confusing with subtle differences in wordings:

* stage1 is when zig is built from C++ code[1] (the "bootstrap" compiler) using system C/C++ compiler toolchain.

* stage2 is when zig is built from Zig code[2] using stage1.

* stage3 is when zig is rebuilt from the same Zig code[2] using stage2.

Before today, zig would give you stage1 by default, and you could opt in to stage2 using `-fno-stage1`. After today, zig gives you stage3 by default, and you can opt in to stage1 using `-fstage1`.

In all three cases, LLVM is being used. Although Zig has started to fully self-host by providing backends that have no dependency on LLVM, none of these fully self-hosted backends are complete.

Why bother self-hosting? Because:

* Zig produces smaller, faster binaries than C++ that use less memory[4]. Case in point: the new self-hosted compiler is 1.5x faster than the C++ implementation and uses 3x less peak RAM.

* Development velocity in Zig is much faster than C++, and debugging is a breeze in comparison due to Zig being much safer than C++ and having better debug tooling. Similarly, comptime features let us add more assertions and debug checks that are not possible in C++.

* Zig compiles much faster than C++.

* Zig cross compiles better than C++ making it easier to create builds of the compiler for every target.

* The self-hosted compiler does not need a softfloat library dependency to support f16 or f128 operations.

* Zig's std lib data structures are incredibly useful, especially compared to the C++ STL.

There are still many known bugs; not every project will be able to upgrade immediately. See the full upgrade guide [3] for help deciding when and how to upgrade.

[1]: https://github.com/ziglang/zig/tree/master/src/stage1

[2]: https://github.com/ziglang/zig/tree/master/src

[3]: https://github.com/ziglang/zig/wiki/Self-Hosted-Compiler-Upg...

[4]: https://media.handmade-seattle.com/practical-data-oriented-d...

lewurm · 3 years ago

Thanks for the context!

What's the difference between the stage2 and stage3 binary? Does stage1 produce different binaries for the same input compared to stage2/stage3?

lewurm commented on Clojure and Doom Emacs on a brand new M1 computer arthurbrrs.me/clojure-doo... · Posted by u/tosh

lewurm · 3 years ago

GraalVM will have a stable release that includes Apple Silicon support next week. Glad to see the snapshot did the job for you though :-)

lewurm commented on OpenSSH 9.0 openssh.com/releasenotes.... · Posted by u/rurban

Reitet00 · 3 years ago

> there have been situations where I needed to prove my identity to people who only had my ssh public key

Just wondering what kind of situation can this be where someone has only your ssh public key? Usually people know each other via say, github user names or irc handles but ssh public keys? (genuinely curious)

lewurm · 3 years ago

For github: https://github.com/$user.keys