gmcabrita

Notes

• Fast data algorithms
• Postgres
• Ruby jemalloc
• Ruby exception inheritance

gmcabrita

Postgres

Best practices

• https://wiki.postgresql.org/wiki/Lock_Monitoring
• https://wiki.postgresql.org/wiki/Don't_Do_This
• Checks for potentially unsafe migrations
• https://www.crunchydata.com/postgres-tips
• Avoid avoid using nested transactions and SELECT FOR SHARE
• Notes on some PostgreSQL implementation details

gmcabrita

Fast data algorithms

From: https://jolynch.github.io/posts/use_fast_data_algorithms/

Application	Common Bad Performance Choices	Better Performance Choices	Expected Performance Gain
Trusted data hashing	md5, sha2, crc32	xxhash	~10x
Untrusted data hashing	md5, sha2, sha1	blake3	~10x
Fast compression	snappy, gzip (zlib)	lz4	10x over gzip~2x over snappy
Good compression	gzip (zlib)	zstd	~2-10x

gmcabrita

{
    "name": "Minimal",
    "author": "Gonçalo Cabrita",
    "variables":
    {
        "black": "#000000",
        "white": "#ffffff",
        "green": "#009300",
        "red": "#ff0000",
        "yellow": "#cccc00"

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DetectHiddenWindows True

EXCEPT:="Progman WorkerW Shell_TrayWnd"

#!LButton::
{
  moveActiveWindow
  Return
}

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gem_name = "ruby-progressbar"
`gem install #{gem_name}`
gem_folder_path = `gem which #{gem_name}`.strip.toutf8.gsub("#{gem_name}.rb", "")
$: << gem_folder_path

gmcabrita

#F3F3F4,#121016,#DEDFE1,#060607,#DEDFE1,#313335,#558A66,#B16364,#E4E5E7,#313335

gmcabrita

package main
import (
	"context"
	"fmt"
	"sync" 

	"cloud.google.com/go/firestore"
	firebase "firebase.google.com/go"
)
var (

gmcabrita

// This file was initially generated by Windows Terminal 1.0.1811.0
// It should still be usable in newer versions, but newer versions might have additional
// settings, help text, or changes that you will not see unless you clear this file
// and let us generate a new one for you.

// To view the default settings, hold "alt" while clicking on the "Settings" button.
// For documentation on these settings, see: https://aka.ms/terminal-documentation
{
    "$schema": "https://aka.ms/terminal-profiles-schema",

gmcabrita

function $e(tag='div', props={}, children=[]){
  let element = document.createElement(tag);
  Object.assign(element, props);
  element.append(...children);
  return element;
}

// With `elem.append(...children)` - with the added benefit that plain strings passed to .append() get turned into text nodes automatically, so you probably don't need $t any more.
var $t=document.createTextNode.bind(document);