jboner

Latency Comparison Numbers (~2012)
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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

roachhd

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BrainFuck Programming Tutorial by: Katie

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INTRODUCTION

mrw34

#!/bin/bash

set -euo pipefail

openssl req -new -text -passout pass:abcd -subj /CN=localhost -out server.req -keyout privkey.pem
openssl rsa -in privkey.pem -passin pass:abcd -out server.key
openssl req -x509 -in server.req -text -key server.key -out server.crt
chmod 600 server.key
test $(uname -s) = Linux && chown 70 server.key
docker run -d --name postgres -e POSTGRES_HOST_AUTH_METHOD=trust -v "$(pwd)/server.crt:/var/lib/postgresql/server.crt:ro" -v "$(pwd)/server.key:/var/lib/postgresql/server.key:ro" postgres:12-alpine -c ssl=on -c ssl_cert_file=/var/lib/postgresql/server.crt -c ssl_key_file=/var/lib/postgresql/server.key

proteye

import 'dart:convert';
import 'dart:math';
import 'dart:typed_data';
import "package:pointycastle/export.dart";
import "package:asn1lib/asn1lib.dart";

List<int> decodePEM(String pem) {
  var startsWith = [
    "-----BEGIN PUBLIC KEY-----",
    "-----BEGIN PRIVATE KEY-----",

slightfoot

import 'package:flutter/gestures.dart' show DragStartBehavior;
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

void main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primaryColor: Colors.indigo,

MattPD

Program Analysis Resources

(draft; work in progress)

See also:

• Compilers
  • correctness
• Program analysis:
• Dynamic analysis - instrumentation, translation, sanitizers

rodydavis

name: CI
on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master
jobs:
  build_web:

dnfield

import 'dart:typed_data';
import 'package:meta/meta.dart';

/// Image formats supported by Flutter.
enum ImageFormat {
  /// A Portable Network Graphics format image.
  png,

  /// A JPEG format image.
  ///

lukepighetti

import 'package:logger/logger.dart';

void main() async {
  /// Setup logging service
  final remoteUrl = Uri.parse('http://localhost:8080');
  final logger = LoggingService(
    loggers: {
      ConsoleLogger(),
      RemoteLogger(baseUrl: remoteUrl),
    },

lesnitsky

import 'package:flutter/material.dart';

class Service {
  final String authToken;
  Service({this.authToken});

  getData() async {
    if (authToken == null) {
      fetchAnonymous();
    } else {