Mark's Blog : The Case of the Slooooow System
http://blogs.technet.com/markrussinovich/archive/2008/09/24/3126858.aspx

The Case of the Slooooow System

Python logging console for Firebug

FirePython is a sexy Python logger console integrated into Firebug.

Parasite is a debugging and development tool that runs inside your GTK+ application's process. It can inspect your application, giving you detailed information on your UI, such as the hierarchy, X window IDs, widget properties, and more. You can modify properties on the fly in order to experiment with the look of your UI.

Something that looks like it will make GUI development 30% less painful.

We called it the Rubber Duck method of debugging. It goes like this:

We called it the Rubber Duck method of debugging. It goes like this: 1) Beg, borrow, steal, buy, fabricate or otherwise obtain a rubber duck (bathtub variety) 2) Place rubber duck on desk and inform it you are just going to go over some code with it, if that's all right. 3) Explain to the duck what you code is supposed to do, and then go into detail and explain things line by line 4) At some point you will tell the duck what you are doing next and then realise that that is not in fact what you are actually doing. The duck will sit there serenely, happy in the knowledge that it has helped you on your way.

"We called it the Rubber Duck method of debugging. It goes like this:"

rubber duck method of debugging

we call it the rubber duck method of debugging

My favorite.

The rubber duck debugging method

I have to get a rubber duck.

> There is an entire development methodology (whose name escapes me at the moment) that makes use of that very phenomenon. We called it the Rubber Duck method of debugging. It goes like this:

Mistä saisin sopivan ankan?

Fix Memory

great bookmarks

How to Fix Memory Leaks in Java

Integrating FirePHP for Ajax Development

Tutorial für den Einsatz von FirePHP (Extension für Firebug)

There are many integrated development environments and tools available to aid in building Web 2.0 AJAX applications with PHP, but nothing comes close to the ease of use and tight Firebug integration that FirePHP provides.

Blackbird offers a dead-simple way to log messages in JavaScript and an attractive console to view and filter them. You might never use alert() again.

javascript logging utility

Great looking js logging console for all browsers

JavaScript Debugging

Microsoft's Internet Explorer 6 is almost universally hated by web developers. Fortunately, with the help of Visual Studio and by changing a few IE settings, we can make it much easier on ourselves.

An article about named function expressions in Javascript

different ways of defining functions

Theoretical and practical aspects of Javascript's named function construct

Surprisingly, a topic of named function expressions doesn’t seem to be covered well enough on the web. This is probably why there are so many misconceptions floating around. In this article, I’ll try to summarize both - theoretical and practical aspects of these wonderful Javascript constructs; the good, bad and ugly parts of them.

FireQuery is a collection of Firebug enhancements for jQuery

jquery extension for firefox

If you want to make a personal decision that only you can make like whether or not you should start a business, try putting into writing a list of arguments for and against the idea. If that fails, consider divination. Suppose you have studied the idea from all angles, have done all your homework, and worked out all the consequences and pros and cons in your mind, and yet still remain indecisive. You now must follow your heart and tell your brain to shut up. The multitude of available divination techniques are very useful for determining your own semi-conscious desires, as they each present a complete ambiguous and random pattern that your own subconscious will assign meaning to.

Typically, there are two main ways of debugging server-side code: you can utilize an Integrated Development Environment (IDE) with a built-in debugger or log and perform your debugging processes in a web browser.

On how to trace Bash script execution.

Hirb::View.formatter_config

Irb is a great place for interacting with Ruby. Unfortunately, even with the colorful help of wirble, it's not so great for visualizing the output of those interactions. Hirb aims to change that.

View mini framework for irb.

code.interact(), Python debugger and logging

und the current line. Let's give it a try:

"WSGI middleware which displays sparklines of Python object counts and allows you to introspect them, using the gc module under the hood"

Finding and fixing memory leaks can be a real challenge, but luckily Python has some pretty good tools for spotting these things. I have already written about this issue and this post will go into more details on how to spot and debug a memory leak in MySQLdb, which is the standard Python wrapper for MySQL.

Great look at Debugging PHP - Useful for anyone really

sounds super useful, wish there was something like this for flash.

PHP debug info for the client side

Include-olsz egy php fájl a forrásodban, plusz egy plugint felresz, és máris van egy php debuggered a böngésződben a Firebug-ba beépülve.

Output PHP debug info to client side.

awesome looking in-browser PHP debugger - nearly as nice as the werkzeug ine is for Python. "I develop PHP async interactions via ActionScript and LoadVars, Ajax, or Remote Scripting before, since year 2000 but for some reason I have never thought about a portable, scalable, simple, and complete debugger file as Formaldehyde is. I hope you'll appreciate its simplicity, its basic and useful features, and I am waiting for your feedback in WebReflection"

Pretty useful when working with API's. I like it...

"Hurl makes HTTP requests. Enter a URL, set some headers, view the response, then share it with others. Perfect for demoing and debugging APIs."

Hurl makes HTTP requests. Enter a URL, set some headers, view the response, then share it with others. Perfect for demoing and debugging APIs.

Hurl makes HTTP requests. Enter a URL, set some headers, view the response, then share it with others. Perfect for demoing and debugging APIs.

HTTP request debugging in the web, perfect for demoing and debugging APIs.

Hurl make HTTP requests like 'cURL' but a web interface.

Hurl makes HTTP requests. Enter a URL, set some headers, view the response, then share it with others. Perfect for demoing and debugging APIs.

Sun now integrates a profiler in the jdk

Java VisualVM – Developer`s Nightmare is Over

VisualVM is an open source tool for monitoring and profiling your Java applications. VisualVM is now integrated with JDK 6 update 7 release and also available as a stand-alone setup. Java 7 plans to integrate next version 1.2.

Alguma coisa relacionada à eventos controlados pelo firebug, ainda não li

Plugin for firefox to show event handlers, and more

This extension brings a new Events panel that lists all of the event handlers on the page grouped by event type. The panel also nicely integrates with other Firebug panels and allows to quickly find out, which HTML element is associated with specific event listener or see the Javascript source code.

A dead sexy theme to help you debug your WordPress install.

-remote-shell-port=9222

chrome用デバッグツール　eclipse前提

Despite what a lot of people believe, it's easy to introduce memory and resources leaks in .NET applications. The Garbage Collector, or GC for close friends, is not a magician who would completely relieve you from taking care of your memory and resources consumption. I'll explain in this article why memory leaks exist in .NET and how to avoid them. Don't worry, I won't focus here on the inner workings of the garbage collector and other advanced characteristics of memory and resources management in .NET. It's important to understand leaks and how to avoid them, especially since they are not the kind of things that is easy to detect automatically. Unit tests won't help here. And when your application crashes in production, you'll be in a rush looking for solutions. So, relax and take the time to learn more about this subject before it's too late. Table of Content * Introduction * Leaks? Resources? What do you mean? * How to detect leaks and find the leaking resources *

.NETでリークする要因。「Events, or the "lapsed listener" issue」は良く目にする。

PDB Overview

via http://blogs.microsoft.co.il/blogs/sasha/archive/2009/09/06/exploitable-crash-analyzer.aspx

Only requires that gdb be available on the box. No requiring libraries or listening on sockets to get the console. Rad.

Whoah, hot-swapping IRB prompt for running Ruby process.

This is the third post in the article series about Unix and Linux utilities that you should know about. In ...

Speed Tracer is a Google Chrome extension that enables developers to identify performance problems in their web apps using a "Sluggishness Graph," in combination with many other metrics.

12/08/2009 07:14:00 PM Do you ever wonder what's going on inside the browser when a webpage doesn't load or respond as quickly as it should? Many developers do, especially when trying to build powerful web applications for their users. But up until now, it's been difficult for developers to identify problems in a slow-to-respond application. So, tonight at Google Campfire One, we're happy to announce that we're adding a new tool to Google Web Toolkit called Speed Tracer. Speed Tracer is a Google Chrome extension that enables developers to identify performance problems in their web apps using a "Sluggishness Graph," in combination with many other metrics. In the spirit of clean, simple design, developers need only look at the Y-Axis of their application's Sluggishness Graph to see how they're doing: * If the y-axis is close to zero, then the app is fast * If the y-axis registers around 100%, then the app is, well, sluggish And in either case, Speed Tracer provides lots of ad

It works over the top of jQuery and diligently reports errors and any incorrect usage of jQuery. It will also, to some extent, offer guidance on best practices and performance concerns. Handy with firebug's console.

"jQuery Lint is a simple script you can download and use with jQuery. It works over the top of jQuery and diligently reports errors and any incorrect usage of jQuery. It will also, to some extent, offer guidance on best practices and performance concerns."

IE6 CSS Debugging

border: 1px solid red !important;

Worth taking for a spin

To put it simply, Krumo is a replacement for print_r(); and var_dump();. By definition Krumo is a debugging tool (initially for PHP4/PHP5, now for PHP5 only), which displays structured information about any PHP variable.

You don't need to debug Java applications on just your local desktop. Learn how to spread around your debugging using different connection types that make up remote debugging. This article outlines the features and examples that show how to set up remote application debugging.

Remote Debugging of JAVA Applications

Simple, easy method to visually inspect a JSON-encoded string.

post bem interessante com links para programas bacanas (inclusive pacotes das versões do ie) sobre debug nos ie

It’s somewhat usual to leave the testing with Internet Explorer until the end of the project. This is quite acceptable when you’re dealing mainly with layout issues. But when you’re building a web application with loads of features, there are several issues to struggle with: constant debugging, client-side performance, proprietary bugs and so on. However, getting your hands dirty with IE doesn’t always feel as comfortable as with other browsers. In this article, I’m going to list and review different set of tools, which will help you and make your debugging and testing process in Internet Explorer much more enjoyable.

ブラウザデフォルトスタイル。IE8で見出しとか大きく変わってたんだな。

sudo dtrace -n 'syscall::write*:entry /execname == "Spotify" && arg0 == 2/ { trace(copyinstr(arg1)); ustack(); }'

"Spotify for Windows contains code so awesome that [Windows debugger] OllyDbg can't look at it without crashing."

Spotify for Windows contains code so awesome that OllyDbg can't look at it without crashing.

"This results in an increase from 500 requests/sec to 7000 requests/sec when using Sinatra+Thin+Epoll+Threads. That is pretty ill." -- Joe Damato

On top of all that, this patch helps with Ruby’s green threads, too. If the epoll_wait causes a Ruby event to fire and that event creates a Ruby thread, that Ruby thread gets an entire copy of the existing stack. Each time that thread is switched into and out of, that thread stack has to be memcpy’d into and out of place. Reducing those memcpys by ~800,000 bytes is a HUGE performance win. Want to learn more about threading implementations? Check out my threading models post: here. Fixing this turned out to be pretty simple. A six (6!!) line patch: * Speeds up GC by 2-3x because of the huge decrease in stack frame size. * Fixes an open bug in EventMachine where using threads with Epoll causes lots of slowness. The reason is that each thread will inherit an ~800,000 byte stack that gets copied in and out every context switch. * This results in an increase from 500 requests/sec to 7000 requests/sec when using Sinatra+Thin+Epoll+Threads. That is pretty ill.

l in all, a productive debugging session lasting about an hour. The result was a simple patch, with 2 big performance improvements.

showing .net webservice errors asp.net webservices

Watch live mysql sql statements with dtrace

helpful

Debug JQuery

jQueryのコードを Firebugを使ってデバッグする方法のレクチャー記事です。

Different tools and techniques for improving jQuery code

แก้โค้ดในบราวเซอร์

a really nice article on debugging

Amazing forensic methods to compare system cache in memory with image on disk.