TheMode

jart / blc.S

Last active June 10, 2023 06:58

Binary Lambda Calculus Virtual Machine for x64 Linux in 400 bytes

	/-- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
	│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
	╞══════════════════════════════════════════════════════════════════════════════╡
	│ Copyright 2022 Justine Alexandra Roberts Tunney │
	│ │
	│ Permission to use, copy, modify, and/or distribute this software for │
	│ any purpose with or without fee is hereby granted, provided that the │
	│ above copyright notice and this permission notice appear in all copies. │
	│ │
	│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │

Glavo / PanamaJIT.java

Last active November 23, 2021 10:43

PanamaJIT Demo

	import jdk.incubator.foreign.*;
	import java.lang.invoke.*;

	// Original code (C++): https://stackoverflow.com/a/40937610/7659948
	public class PanamaJIT {

	public static final int MEM_COMMIT = 0x00001000;

	public static final int PAGE_READWRITE = 0x04;
	public static final int PAGE_EXECUTE_READ = 0x20;

jboner / latency.txt

Last active December 14, 2025 16:19

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD