lukeed

// https://crontab.guru/
// https://www.typescriptlang.org/play?ts=4.9.5#code/C4TwDgpgBAwgSgeQHJQLxQAYBIDe9kB0AogB5gBOEAzlQJYD2AdgL5S75LFmU0Mtt5EnUhWp0mrdkK6jeEgRxk9xLDAG4AUAHotUPVAB6Afg0bQkKABVqwAIxpY0gBIBXALYBDRgB4ARAGYABigATigAKgiI3wA+TR19QxMzcGhrKmAAJgdFV08fX0iwyJLY+N19Y1NzNJt-HOd3Lz9wrXriqPCy7Qq9KpSLdOAAFgbCPObCtoitUZLouJ7E-pqrGwBWMc4Jgtb6+dLFhMrk1aGANi2CHZaZ-c7u477T1LWMgHYrm99bTdbsg6PXpJaqvIYADi+TV2UXuXSOwJWYJsYXQuWhtxK00O5WWL0GNlswTRjXymKg+y0AKBeNBBIytnsJPGGMKsJm2WGNJOdNqDOyzO2rOCmUpAOxs25z15bzs9UF11ZYVFHLuUC5CNpAz5dlGCu+rV+M0ukX2UpB2tlRv1rIOFIWuJ5SwAtK6AMYuYCu52mAAmEDdABsPJQoIwPG5qGAPG7oBwoDgNHoIGR6ORgFBViJlHwHABycJ5qAAHzD7gARhByCXMK1cIwK1XmOpTMnU+nM68bpYoCngBBGL6qI5kDEHEnElZeyR+4Ph9gcLRGAAzKtQACykkXK7XTi3S9X1YAIpuBAe1+vT7hz8eAOrNieTqBGKy0SPeJwAGnXY77A6HmDXju1Y9n+c5QBk5BLgA5g+T6JC+R4eCA3iXp+UAnuhR63r+M7-vOQGHhh06zgBkEwXB8EIcRYEAb4vhQI+VH6C+lhMcxUAAFyATglisEwAhHpRHHcYwEAAG5Vuxk6iRJUlUbJknkJoE4JN6jETmcb4QB+9AuOQ6HrkunoQGO6BMUZDb9iR+FQAWRbSS+Th6dWtHDvZegvnmcnkCAUBuMZ-ZFgk8wAPpQOFoXSdxzn6TZ4ELjeUBOPFAENm4

swalkinshaw

Moved to Shopify/graphql-design-tutorial

nadavrot

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

rygorous

why doesn't radfft support AVX on PC?

So there's two separate issues here: using instructions added in AVX and using 256-bit wide vectors. The former turns out to be much easier than the latter for our use case.

Problem number 1 was that you positively need to put AVX code in a separate file with different compiler settings (/arch:AVX for VC++, -mavx for GCC/Clang) that make all SSE code emitted also use VEX encoding, and at the time radfft was written there was no way in CDep to set compiler flags for just one file, just for the overall build.

[There's the GCC "target" annotations on individual funcs, which in principle fix this, but I ran into nasty problems with this for several compiler versions, and VC++ has no equivalent, so we're not currently using that and just sticking with different compilation units.]

The other issue is to do with CPU power management.

StevenACoffman

Fluent-bit rocks

A short survey of log collection options and why you picked the wrong one. 😜

Who am I? Where am I from?

I'm Steve Coffman and I work at Ithaka. We do JStor (academic journals) and other stuff. How big is it?

Number	what it means
101,332,633	unique visitors in 2017

jpswade

Find the original here article here: Devops Best Practices

DevOps started out as "Agile Systems Administration". In 2008, at the Agile Conference in Toronto, Andrew Shafer posted an offer to moderate an ad hoc "Birds of a Feather" meeting to discuss the topic of "Agile Infrastructure". Only one person showed up to discuss the topic: Patrick Debois. Their discussions and sharing of ideas with others advanced the concept of "agile systems administration". Debois and Shafer formed an Agile Systems Administrator group on Google, with limited success. Patrick Debois did a presentation called "Infrastructure and Operations" addressing

herenow

# app/models/concerns/object_id.rb
module ObjectId
  class ObjectIdReservedErr < StandardError; end
  class ObjectIdPersistedErr < StandardError; end

  def self.included(base)
    base.extend ClassMethods
    base.send :include, InstanceMethods
  end

marianogappa

/*
This snippet is an example of backpressure implementation in Go.
It doesn't run in Go Playground, because it starts an HTTP Server.

The example starts an HTTP server and sends multiple requests to it. The server starts denying
requests by replying an "X" (i.e. a 502) when its buffered channel reaches capacity.

This is not the same as rate-limiting; you might be interested in https://github.com/juju/ratelimit
or https://godoc.org/golang.org/x/time/rate.

pixeltrix

When should you use DateTime and when should you use Time?

It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:

>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000

chrismdp

# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
# This is how I upload my new Sol Trader builds (http://soltrader.net)
# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash

S3KEY="my aws key"
S3SECRET="my aws secret" # pass these in

function putS3
{
  path=$1