MCHPRS

What I also find amazing is the server software used to run it ( https://github.com/MCHPR/MCHPRS ): - Re-implements parts of Minecraft - Runs 512x512 plots in different threads - Compiles Redstone applying different kind of optimization passes https://github.com/MCHPR/MCHPRS/blob/master/docs/Redpiler.md - It had Jit backends before, but seems they have been removed

A minecraft server isn't exactly a small side project. There are some in works for 3-5 years and they are not yet complete, some have very specific features (like https://github.com/MCHPR/MCHPRS which is meant for redstone showcases). This COBOL server doesn't yet implement lighting and that's one of the hardest parts since mob generation also depends on it. It also didn't fully implement some blocks. You need years to finish a minecraft server so getting something done fast isn't the best path along the way.

> - Runs at 1 million ticks per second thanks to MCHPRS server - which is 5.8 kHz clock speed I had to go look into this, because that's shockingly fast. The latest Intel CPUs have a 6.2 GHz clock rate when TVBing, so each Minecraft tick runs in ~1,000 CPU cycles. Each thread handles 65k surface blocks (256x256 plot), so that means each cycle is processing upwards of 10 surface cycles in the most lenient circumstances I can think of. I went to go look into how on Earth they're doing that with all this Redstone around; there are some docs at [1] if anyone else is curious. It looks like they have some kind of Redstone "compiler" that converts the Redstone blocks into a graph, and execution happens on that graph. That's crazy impressive. It does make using Minecraft feel a little silly, to me and perhaps only me. They have an input step

The state of the art these days is https://github.com/MCHPR/MCHPRS It's an implementation of the minecraft server that compiles redstone into a graph representation, and then does optimisations like constant folding, tree shaking, etc. Very cool project. If you ever see timelapses of minecraft computers running game of life, mandelbrot, etc it's most likely with this project.

Pretty cool. The program itself was written in an existing intermediate language called URCL, which was then compiled to CHUNGUS2 assembly. CHUNGUS2 is the processor made with Minecraft's redstone mechanics. The processor was emulated for development, but the demo is running on MCHPRS, a Minecraft server that uses Wasmtime's Cranelift to JIT the redstone operations, which are represented as a weighted directed graph. Before MCHPRS, optimizing redstone performance using compiler techniques was not thought to be possible. With MCHPRS the demo takes 9 hours to run, it would take decades using Minecraft. https://github.com/sammyuri/minecraft https://github.com/MCHPR/MCHPRS As for CHUNGUS2 itself, it's a proper RISC processor, it has a 4-stage instruction pipeline, 64 byte 8-way associative data cache, even branch prediction. https://www.youtu

It's mind blowing how much effort they put into this, the MCHPRS server even JIT compiles redstone into native code using Cranelift: https://github.com/MCHPR/MCHPRS/blob/master/docs/Redpiler.md It really saddens me that their post was removed from r/Minecraft, for crediting a server by including its IP address for literally one second in the video.

As explained in the description of the video, this is not running on a vanilla Minecraft server, but on their own implementation optimized to run redstone circuits. The code displayed at the beginning seems to come from that: https://github.com/MCHPR/MCHPRS/blob/master/crates/core/src/...