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Mathias Buus mafintosh

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mafintosh / join-the-dht-cult.md
Last active November 25, 2022 23:30

Hyperswarm DHT setup

Checking your network for P2Pness

Running a node

Running a dht node is as simple as installing the DHT cli.

npm i -g @hyperswarm/cli
@mafintosh
mafintosh / corestore-1.js
Created February 5, 2020 13:10
const Corestore = require('corestore')
const SwarmNetworker = require('corestore-swarm-networking')
const store = new Corestore('./path-1')
store.ready(function () {
const swarm = new SwarmNetworker(store)
const feed = store.default()
swarm.listen()
@mafintosh
mafintosh / README.md
Last active August 21, 2022 21:12
Using shared-structs with workers <3

Using shared-structs with Workers <3

This showcases how you can use shared-structs over an SharedArrayBuffer, to share complex data structures between worker_threads in Node.js

The main.js example starts a worker and passes a shared struct to it.

The worker will periodically update the struct with an incrementing tick and a random number

@mafintosh
mafintosh / html-cache.js
Created February 2, 2018 14:30
const stream = require('stream')
const cache = new Map() // you might wanna use an lru here
function createCacheStream (url) {
const buf = []
return stream.Transform({
transform: function (data, enc, cb) {
buffer.push(data)
cb(null, data)
},
@mafintosh
mafintosh / trace-mallocs.c
Last active April 7, 2022 19:25
#include <dlfcn.h>
static int mallocs_active = 0;
void *malloc(size_t size) {
void * (*real_malloc)(size_t);
real_malloc = dlsym(RTLD_NEXT, "malloc");
mallocs_active++;
void *ptr = real_malloc(size);
@mafintosh
mafintosh / promise-unhandled-why.js
Last active March 30, 2022 06:30
promise-unhandled-why.js
start()
async function start () {
const promises = [
new Promise((resolve, reject) => setTimeout(reject, 1000)),
Promise.reject(),
Promise.reject()
]
for (const a of promises) {
@mafintosh
mafintosh / build-tinycore.sh
Created August 27, 2015 22:01
# create a tinycorelinux fs with custom .tcz packages
# prerequisites: apt-get install squashfs-tools, npm i nugget -g
# dl release + packages (add your packages here)
nugget http://tinycorelinux.net/6.x/x86_64/release/CorePure64-6.3.iso http://tinycorelinux.net/6.x/x86_64/tcz/{pkg-config,make,gcc,gcc_base-dev,gcc_libs-dev,gcc_libs,glibc_base-dev,linux-3.16.2_api_headers,fuse}.tcz -c
# to support compiling addons
unsquashfs -f pkg-config.tcz
unsquashfs -f make.tcz
unsquashfs -f gcc.tcz
@mafintosh
mafintosh / index.html
Created July 25, 2020 19:24
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Hello World!</title>
</head>
<body>
<video src="custom://u" controls></video>
<!-- <video src="http://localhost:9999" controls></video> -->
</body>
@mafintosh
mafintosh / sodium-benchmark.txt
Created June 25, 2020 13:20
╔════════════════════════════════════════════════════════╤═════════╤═══════════════════╤═══════════╤═════════════════════════╗
║ Slower tests │ Samples │ Result │ Tolerance │ Difference with slowest ║
╟────────────────────────────────────────────────────────┼─────────┼───────────────────┼───────────┼─────────────────────────╢
║ crypto sha256 (prealloc) │ 10000 │ 370321.25 op/sec │ ± 4.65 % │ ║
║ crypto sha512 (prealloc) │ 1000 │ 382075.76 op/sec │ ± 0.94 % │ + 3.17 % ║
║ crypto blake2b512 (prealloc) │ 1000 │ 401530.47 op/sec │ ± 0.98 % │ + 8.43 % ║
║ crypto sha256 (no prealloc) │ 1000 │ 453419.74 op/sec │ ± 0.80 % │ + 22.44 % ║
║ crypto sha512 (no prealloc) │ 1000 │ 460150.51 op/sec │ ± 0.69 % │ + 24.26 % ║
║ crypto
@mafintosh
mafintosh / gist:996d820ad8fec6f3369ab00251f40358
Created June 25, 2020 12:15
╔═════════════════════════════════════════════╤═════════╤═══════════════════╤═══════════╤═════════════════════════╗
║ Slower tests │ Samples │ Result │ Tolerance │ Difference with slowest ║
╟─────────────────────────────────────────────┼─────────┼───────────────────┼───────────┼─────────────────────────╢
║ crypto sha512 (prealloc) │ 10000 │ 340764.93 op/sec │ ± 6.40 % │ ║
║ crypto sha256 (prealloc) │ 1000 │ 357872.79 op/sec │ ± 0.63 % │ + 5.02 % ║
║ crypto blake2b512 (prealloc) │ 1000 │ 374023.05 op/sec │ ± 0.96 % │ + 9.76 % ║
║ crypto sha256 (no prealloc) │ 10000 │ 416877.14 op/sec │ ± 8.05 % │ + 22.34 % ║
║ crypto blake2b512 (no prealloc) │ 10000 │ 454022.65 op/sec │ ± 8.32 % │ + 33.24 % ║
║ crypto sha512 (no prealloc) │ 1000 │ 468638.04 op/sec │ ± 0.72 % │ + 37.5