hellerbarde

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

steipete

This was nice and fast... but it takes up WAY TOO MUCH space. And it's annoying to write.
(I like the way I can just step into the function that calls the delegate for debugging)

What's a better way to not make me call respondsToSelector in the middle of my code? Some proxy?

    struct {
        unsigned int delegateWillDisplayDocument:1;
        unsigned int delegateDidDisplayDocument:1;
        unsigned int delegateDidShowPageView:1;
        unsigned int delegateDidRenderPageView:1;

steipete

// Copyright (c) 2012-2013 Peter Steinberger (http://petersteinberger.com)
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in

0xced

//
// Copyright (c) 2012-2015 Cédric Luthi / @0xced. All rights reserved.
//

#import <Foundation/Foundation.h>

#if TARGET_OS_SIMULATOR

static const char *fakeCarrier;
static const char *fakeTime;

jimweirich

require './interface'
puts to_strings(->(limit) {
  ->(lst) {
    ->(f) {
      ->(f) {
        ->(g) {
          ->(n) {
            f.(g.(g)).(n)
          }
        }.(->(g) {

mikeash

// clang -framework Foundation -fobjc-arc -O3 test.m

#import <Foundation/Foundation.h>


@interface Slice : NSObject
@property NSInteger start;
@property NSInteger length;
@end
@implementation Slice

steipete

// Add support for subscripting to the iOS 5 SDK.
#if __IPHONE_OS_VERSION_MAX_ALLOWED < 60000
@interface NSObject (PSPDFSubscriptingSupport)

- (id)objectAtIndexedSubscript:(NSUInteger)idx;
- (void)setObject:(id)obj atIndexedSubscript:(NSUInteger)idx;
- (void)setObject:(id)obj forKeyedSubscript:(id <NSCopying>)key;
- (id)objectForKeyedSubscript:(id)key;

@end

santisaez

STUN implementations

• stund
• Content: server daemon and test client for STUN, RFC-3489 only
• URL does not load, the project seems abandoned
• The code is also available on SourceForge, last update was on January 2012
• TCP and TLS modes not supported
• The server needs two IPs, it’s mandatory and can not be configured
• C++, no extra libraries required, Windows port available
• Version = 0.97 (0.96 package available on Debian, 5 years without updates)

swannodette

;; based on core.logic 0.8-alpha2 or core.logic master branch

(ns sudoku
  (:refer-clojure :exclude [==])
  (:use clojure.core.logic))

(defn get-square [rows x y]
  (for [x (range x (+ x 3))
        y (range y (+ y 3))]
    (get-in rows [x y])))

judofyr

a=b=c=(1..100).each do |num|
  print num, ?\r,
    ("Fizz" unless (a = !a) .. (a = !a)),
    ("Buzz" unless (b = !b) ... !((c = !c) .. (c = !c))),
    ?\n
end