miguelff

                     user       system     total        real
Iterative (10)       0.000000   0.000000   0.000000  (  0.000006)
Formula   (10)       0.010000   0.000000   0.010000  (  0.010514)
Recursive (10)       0.000000   0.000000   0.000000  (  0.000004)
Iterative (20)       0.000000   0.000000   0.000000  (  0.000004)
Formula   (20)       0.040000   0.000000   0.040000  (  0.043513)
Recursive (20)       0.000000   0.000000   0.000000  (  0.000010)
Iterative (100)      0.010000   0.000000   0.010000  (  0.000048)
Formula   (100)      1.130000   0.010000   1.140000  (  1.141393)
Recursive (100)      0.000000   0.000000   0.000000  (  0.000034)

miguelff

## Platform-data tooling

This document describes the set of tools and processes used by @github/platform-data to satisfy their operational needs, and accomplish their [goals](https://github.com/github/platform-data#our-goals-and-values) in an effective and efficient way.

#### Operational needs (goals alignment)

What we do defines our needs. Our main goal is to make sure GitHub is resilient and keeps being fast even if there is "a million of them", to do it, we carry on the following activities:

* **Modelling**: Given a new feature, design and implement data models and access patterns that are both fast and scalable.
* **Reviewing:** Given a proposed PR, advise and provide alternatives on maintainability or performance improvements.

miguelff

🦁

miguelff

Tips about drawing digitally

I asked on https://www.facebook.com/groups/1014974001864957/permalink/1252338398128515/ and these were the main points:

• Set the tablet settings, on the driver and on the software used for drawing. For example, pressure sensitivity.
• Check the projection: what screen you're using to project the table and ensure the "constrain proportions" setting is checked.
• Consider line stabilizing software like Lazy Nezumi Pro (only Windows so far). Sketchbook Pro has this sort of line as well.
• Use Mischief rather than Photoshop for line drawing. It's simpler and produces more natural line drawing, which can be later exported for rendering in Photoshop.
• Get comfortable with using undo constantly.
• Use hard felt nibs for the tablet, the have increased friction and feel more like a pen on paper.

miguelff

Assuming you llvm installed (comes as standard on Mac OS Mavrick xtools)

Create a helloworld.c file:

  #include<stdio.h>
  
  int main()
  {
 int x=3;

miguelff

require "set"
@mantras = Set.new

trap "SIGINT" do
  puts "YOU HAVEN'T FINISHED YET!"
end

def learn(&instructions)
  instance_eval &instructions

miguelff

# use the latest ubuntu environment (18.04) available on travis
dist: xenial

language: go

# Force-enable Go modules. Also force go to use the code in vendor/
# These will both be unnecessary when Go 1.13 lands.
env:
  - GO111MODULE=on
  - GOFLAGS='-mod vendor'

miguelff

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

miguelff

Keybase proof

I hereby claim:

• I am miguelff on github.
• I am miguelff (https://keybase.io/miguelff) on keybase.
• I have a public key ASBI6T5HfJcq531pX597-0OiXujhozFobuX58IqS8qHR8go

To claim this, I am signing this object:

miguelff

WITH fulfillment_method_classification AS (
    SELECT
      f._shop_key,
      f."order id",
      f."shop shipping country",
      f."fulfillment id",
      CASE
      WHEN ofsd."is shopify shipping fulfillment" = 'Fulfilled via Shopify Shipping'
        THEN 'Shopify Shipping'
      WHEN _api_client_key = -2