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| The Latest from Handwaving | MORE | | High Performance Counters Of course this isn’t a global counter, but it sets a baseline for performance. There doesn’t appear to be a high performance concurrent counter available in the.NET framework. timed various simple implementations on my Core 2 Duo laptop: A single thread can increment a static field 1.5 billion times in 4 seconds. Two threads that update a static field runs slightly slower than 4 seconds probably due to the locking overhead. Two threads that use Interlocked.Increment to update a shared field takes 52 seconds!! Why is it so slow? Two threads that update a ThreadStatic field takes 2.5 DevelopMentor Courses - Wednesday, November 23, 2011 Confessions of a reddit addict Of course I can turn this off anytime I want. Reddit is addictive in much the same was as slot machines: the rewards are random. Though most of the comment threads on reddit are painfully stupid, there are enough stupendously hilarious threads to keep me buzzing on a dopamine rush. But it’s time to regain control of my life. To do so, I set my router to use OpenDNS , where you can block any site you want. run DD-WRT on my router, which is set to use DNSMasq as my local DNS proxy. However, you need to configure DNSMasq to use their dns servers, which I’ve added below. Technology Handwaving - Thursday, August 25, 2011 Computer Language Benchmarks Of course, this calculation is extremely crude, but the goal is to get a sense of the difference in scale. The Computer Language Benchmarks Game explains the limits of comparing the performance of different programming languages (PL) using simplistic benchmarks. The issue is how to map the performance of real programs to a new language using data from simple benchmarks. How would my Java program perform if written in Haskell? People seem to have given up on this sort of comparison, but I think it’s possible to generate a decent approximation. Handwaving - Wednesday, May 26, 2010 | | The Best from Handwaving | MORE | | High Performance Counters Of course this isn’t a global counter, but it sets a baseline for performance. There doesn’t appear to be a high performance concurrent counter available in the.NET framework. timed various simple implementations on my Core 2 Duo laptop: A single thread can increment a static field 1.5 billion times in 4 seconds. Two threads that update a static field runs slightly slower than 4 seconds probably due to the locking overhead. Two threads that use Interlocked.Increment to update a shared field takes 52 seconds!! Why is it so slow? Two threads that update a ThreadStatic field takes 2.5 DevelopMentor Courses - Wednesday, November 23, 2011 Confessions of a reddit addict Of course I can turn this off anytime I want. Reddit is addictive in much the same was as slot machines: the rewards are random. Though most of the comment threads on reddit are painfully stupid, there are enough stupendously hilarious threads to keep me buzzing on a dopamine rush. But it’s time to regain control of my life. To do so, I set my router to use OpenDNS , where you can block any site you want. run DD-WRT on my router, which is set to use DNSMasq as my local DNS proxy. However, you need to configure DNSMasq to use their dns servers, which I’ve added below. Technology Handwaving - Thursday, August 25, 2011 Computer Language Benchmarks Of course, this calculation is extremely crude, but the goal is to get a sense of the difference in scale. The Computer Language Benchmarks Game explains the limits of comparing the performance of different programming languages (PL) using simplistic benchmarks. The issue is how to map the performance of real programs to a new language using data from simple benchmarks. How would my Java program perform if written in Haskell? People seem to have given up on this sort of comparison, but I think it’s possible to generate a decent approximation. Handwaving - Wednesday, May 26, 2010 | - Programming Succinctly
Of course, the central question remains, what does “power” mean for a language? Paul Graham wrote an essay a while back arguing that succinct programs (i.e. short) are more powerful, whatever that means. There seems to be correlation between languages we believe are more powerful (e.g. Lisp, Haskell) and shorter programs compared to mainstream languages (Java, C#, C++). Why is this so? Certainly, there is more messy boilerplate required by popular languages. In procedural and OO languages, you spend a lot of time defining and using variables in your code, which makes your code verbose. Handwaving - Friday, November 13, 2009 - Concurrent Skip List issues
Of course, my test case is probably extreme. A commenter on my code sample for a concurrent skiplist correctly pointed out two errors in the program. attempted to fix both, but further testing revealed another problem in Release mode (optimized, no debug). One of the thread would suddenly stop. After much screwing around, I discovered that the program was stuck in a spin wait: “while (!goAhead) goAhead) ;&#. added a volatile declaration to that variable and then the program worked. I’ve put the code in Launchpad and removed it from the other post. Handwaving - Wednesday, August 26, 2009 - All-you-can-read subscription for news
Of course, people want their news electronically. Newspapers are dying. Walter Isaacson says newspapers must charge for content , but Michael Kinsley says it will not work. In particular, Isaacson likes micropayments, but almost everyone else hates the idea. This blog explains the problem with newspapers better than most. The New York Times had a subscription for some stuff, took it down, but are now rethinking the issue. The problem is that no one wants to pay for several independent subscriptions, and there’s a usability issue with micropayments. Handwaving - Thursday, February 12, 2009 %>
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| The Latest from DevelopMentor | MORE | | Unit testing code depending on the ASP.NET #WebApi HttpClient Of course we still need tests for updating existing resources as well as deleting them but with these examples those should be easy enough :-). 'In a previous post I showed how to unit test an ASP.NET WebAPI Controller. But with a REST service there is both a client and a service component. Assuming for a moment the client part is also written in C# we should test that as well. In this case the client application contains the following class to load books from the REST WebAPI controller: 1: public class BooksClient. 7: _httpClient = httpClient; 8: BaseUrl = new Uri( "[link] ); 9: }. The Problem Solver - Monday, May 20, 2013 Dialogue Sheets - update & new planning sheet When I do training course I always give teams one or two retrospective dialogue sheets for them to use for their first retrospectives. 'Last month InfoQ carried an update on the use of retrospective dialogue sheets. The use of these sheets continues to grow and I continue to receive good feedback. If you’ve tried the sheets and haven’t sent me some feedback than please e-mail me and let me know about your experiences. And for those of you who’ve not tried a dialogue sheet retrospective, whats stopping you? The Dialogue Sheet PDFs are free to download. Allan Kelly's Blog - Tuesday, May 7, 2013 Reblogged: What should I learn to get started in.NET and web development? Here’s my advice along with a bunch of courses you can use to accomplish this efficiently and affordably. Here are the related LearningLine courses from DevelopMentor which will walk you through this path. Because you can preview the first lesson of each course, you have about 7 hours free and the rest are all included in an affordable $29 subscription. If a lesson (task) happens to be shared across courses, you’ll see it already marked as completed for you and you can just skip to the next. Hope you all find it useful here as well]. How do I do that?” Michael C. Kennedy's Weblog - Monday, May 6, 2013 | -
| The Best from DevelopMentor | MORE | - Why Choose NoSQL and Document Databases over RDBMS
This is an excerpt from my upcoming online MongoDB course for DevelopMentor. Filed under: NoSQL Tagged: DevelopMentor , LearningLine , NoSQL , Online courses , Online learning , Screencasts. NoSQL DevelopMentor LearningLine Online courses Online learning Screencasts 'Do you want to know the biggest single reason you should choose document databases over SQL Server, Oracle, or MySQL? Hint: It’s not performance or scalability. You can take the first 1 1/2 hours for free here: Early access: MongoDB and NoSQL for.NET developers. Cheers, @mkennedy. - Take the first hour of any online developer course for free at LearningLine
We are announcing the ability to preview any of our online courses, for free without entering any payment information. You can now study approximately the first hour of any one of our courses. To get started, just head over to our schedule page , click on any course title you’d like and choose “ Preview course for free “: . At the time of this writing, there are 27 courses which run between 4 and 15 days in length. So head on over to the schedule page and find a course that is right for you: https://learninglineapp.com/schedule. - ELINQ with EF 4.0 Course Update
I’ve been working feverishly the last couple of months to update my DevelopMentor course: Essential LINQ with Entity Framework 4.0. Here is a breakdown of the course content: Day 1: 1. Here’s when and where we’re offering the course: Boston: February 9-12, 2010 London: February 23-26, 2010 Los Angeles: March 30-April 2, 2010 Boston: April 20-23, 2010 London: May 4-7, 2010 Los Angeles: June 8-11, 2010 Boston: June 29-July 2, 2010. Functional Programming in C# 2. LINQ to Objects 3. LINQ to XML. Day 2: 4. LINQ to SQL 5. EF: Architecture 6. EF: LINQ to Entities. Day 3: 7. Tony and Zuzana's World - Tuesday, December 29, 2009 - Richard Blewett: Devweek 2013–WCF Crash Course
Thanks to everyone who attended my Devweek 2013 pre-conference session on WCF. You can get the slides and demos here DevelopMentor Courses - Tuesday, March 5, 2013 - Flowcharts in Workflow 4 and the Switch activity
Of course the FlowSwitch should just to a ToString() on the expression result , anything else would be pointless as any comparison fails. Flowcharts are a nice addition to Windows Workflow Foundation 4. They allow for a lot of pretty complex behavior that is hard to do in a sequential workflow. In WF 3 we used to model these complex behaviors as state machine workflows. That worked but they weren't really state machines or event driven and things could get a bit tricky. No it is just another activity to drop in a workflow. guess you get the picture. So far so good. Next (5). Enjoy! The Problem Solver - Tuesday, October 27, 2009 %>
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