jboner

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

djspiewak

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

1. CPU-bound
2. Blocking IO
3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

Kirens

Prerequisites

We'll use NixOps to deploy, so we need to install it

nix-env -i nixops

And to deploy on DigitalOcean we need to have an account and create an API access token for it.

heathdrobertson

Neovim IDE

Neovim IDE in a NixOS Docker Container

docker run --volumes-from=nix -it \
    -v $(pwd):/home \
    -w /home \
    --name <change-me> \
    -p 9005:9005 \
 -p 3000:3000 \

sinbad

#!/bin/bash

# `gitea dump` doesn't currently back up LFS data as well, only git repos
# It primarily backs up the SQL DB, and also the config / logs
# We'll backup like this:
#   * "gitea dump" to backup the DB and config etc
#   * tar / bzip all the repos since they will be skipped
#     * Not rotated because git data is immutable (normally) so has all data
#   * rsync LFS data directly from /volume/docker/gitea/git/lfs
#     * No need for rotation since all files are immutable

joepie91

No, your cryptocurrency cannot work

Whenever the topic of Bitcoin's energy usage comes up, there's always a flood of hastily-constructed comments by people claiming that their favourite cryptocurrency isn't like Bitcoin, that their favourite cryptocurrency is energy-efficient and scalable and whatnot.

They're wrong, and are quite possibly trying to scam you. Let's look at why.

What is a cryptocurrency anyway?

There are plenty of intricate and complex articles trying to convince you that cryptocurrencies are the future. They usually heavily use jargon and vague terms, make vague promises, and generally give you a sense that there must be something there, but you always come away from them more confused than you were before.

getaaron

• Call 1-800-829-1040
• Press 1 for English (or other language as desired)
• Press 2 for personal tax
• Press 1 for form / tax history
• Press 3 for other
• Press 2 for other
• Ignore 2 SSN prompts till you get secret other menu
• Press 2 for personal tax
• Press 3 for other
• Wait for agent!