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  Optimization Tricks used by the Lockless Memory Allocator

With the releasing of the Lockless Memory Allocator under the GPL version 3.0 license, we can now discuss more of the optimization tricks used inside it. Many of these are things you wouldn't want to use in normal code. However, when speed is the ultimate goal, sometimes we need to break a few rules and use code that is a little sneaky.The SlabA slab is a well-known technique for allocating fixed size objects. For a given object size, a chunk of memory is divided up into smaller regions of that ...

   Optimization,Memory allocation     2011-11-16 08:02:16

  SQL Injection through HTTP Headers

During vulnerability assessment or penetration testing, identifying the input vectors of the target application is a primordial step. Sometimes, when dealing with Web application testing, verification routines related to SQL injection flaws discovery are restricted to the GET and POST variables as the unique inputs vectors ever. What about other HTTP header parameters? Aren’t they potential input vectors for SQL injection attacks? How can one test all these HTTP parameters and whic...

   Code security,SQL injection,HTTP header     2012-04-05 11:42:04

  Why Emacs?

PreludeIf you are a professional writer – i.e., if someone else is getting paid to worry about how your words are formatted and printed – Emacs outshines all other editing software in approximately the same way that the noonday sun does the stars. It is not just bigger and brighter; it simply makes everything else vanish.Neal StephensonIn the Beginning … Was the Command LineI’m an Emacs user and I’m proud of the fact. I know my reasons for using it (and loving i...

   Emacs,Linux,IDE,Editor,Usage     2011-11-21 10:22:05

  Coding tricks of game developers

If you've got any real world programming experience then no doubt at some point you've had to resort to some quick and dirty fix to get a problem solved or a feature implemented while a deadline loomed large. Game developers often experience a horrific "crunch" (also known as a "death march"), which happens in the last few months of a project leading up to the game's release date. Failing to meet the deadline can often mean the project gets cancelled or even worse, you lose your job. So w...

   Tricks,Advice,Gamedesign,Plan     2012-02-12 04:50:30

  Cache them if you can

“The fastest HTTP request is the one not made.” I always smile when I hear a web performance speaker say this. I forget who said it first, but I’ve heard it numerous times at conferences and meetups over the past few years. It’s true! Caching is critical for making web pages faster. I’ve written extensively about caching: Call to improve browser caching(lack of) Caching for iPhone Home Screen AppsRedirect caching deep diveMobile cache file sizesImproving app ...

   Cache,HTTP request,Websiite     2012-03-27 12:54:02

  Developing Game Audio with the Web Audio API

Caution: This article discusses APIs that are not yet fully standardized and still in flux. Be cautious when using experimental APIs in your own projects. Introduction Audio is a huge part of what makes multimedia experiences so compelling. If you've ever tried watching a movie with the sound off, you've probably noticed this. Games are no exception! My fondest video game memories are of the music and sound effects. Now, in many cases nearly two decades after playing my favorites, I still c...

   Web Audio,HTML5,Game audio     2012-04-15 01:25:23

  A Python Optimization Anecdote

Hi! I’m Pavel and I interned at Dropbox over the past summer. One of my biggest projects during this internship was optimizing Python for dynamic page generation on the website. By the end of the summer, I optimized many of dropbox.com’s pages to render 5 times faster. This came with a fair share of challenges though, which I’d like to write about today:The ProblemDropbox is a large website with lots of dynamically generated pages. The more pages that are dynamically generat...

   Python,Anecodate,Optimization,Efficiency     2011-10-25 10:33:20

  Top 9 Most Popular Programming Languages In IT Companies

1.) C LanguageC  Language is a general-purpose computer programming language developed between 1969 and 1973by Dennis Ritchie at the Bell Telephone Laboratoriesfor use with the Unix operating system.Although C was designed for implementing system software. it is also widely used for developing portable application software.?0102030405060708091011#include <stdio.h> int main(void) { printf("hello, world!\n");&nbs...

   C,Java,C#,C++,Ruby,Popular programming l     2011-04-27 09:21:52

  How VR technologies take over the world

Virtual Reality (VR) literally may get it beneficial to experience anything, anywhere, anytime. It is normally the several immersive type of legitimate fact technology and can convince the real real human human brain that it is usually normally someplace it can get absolutely critically not really seriously. Brain installed displays happen to be used with earphones and hands controllers to offer a entirely immersive arrive across. With the major technology businesses on whole world community (Fa...

       2019-05-20 05:30:39

  4 deployment modes of Redis

As a high-performance in-memory database, Redis is widely used in current mainstream distributed architecture systems. To improve system fault tolerance, using multiple instances of Redis is also inevitable, but the complexity is much higher than that of a single instance. This article mainly introduces the four deployment modes of Redis and their advantages and disadvantages. Standalone Standalone mode is to install a Redis, start it, and business connects to it and that's all. The specific ...

   REDIS,STANDALONE,MASTER-SLAVE,SENTINEL,CLUSTER     2023-03-03 21:35:09

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