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  • Memcache vs MySQL in memory

    - by TimK
    I have a database that won't grow much in size. It's current size is about 1 GB. Achieving the fastest performance is desired. Question: When should I use Memcache vs simply using MySQL Innodb ability to store all my content within RAM (innodb_buffer_pool_size)?

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  • MySQL - Calculating fields on the fly vs storing calculated data

    - by Christian Varga
    Hi Everyone, I apologise if this has been asked before, but I can't seem to find an answer to a question that I have about calculating on the fly vs storing fields in a database. I read a few articles that suggested it was preferable to calculate when you can, but I would just like to know if that still applies to the following 2 examples. Example 1. Say you are storing data relating to a car. You store the fuel tank size in litres, and how many litres it uses per 100km. You also want to know how many KMs it can travel, which can be calculated from the tank size and economy. I see 2 ways of doing this: When a car is added or updated, calculate the amount of KMs and store this as a static field in the database. Every time a car is accessed, calculate the amount of KMs on the fly. Because the cars economy/tank size doesn't change (although it could be edited), the KMs is a pretty static value. I don't see why we would calculate it every single time the car is accessed. Wouldn't this waste cpu time as opposed to simply storing it in a separate field in the database and calculating only when a car is added or updated? My next example, which is almost an entirely different question (but on the same topic), relates to counting children. Let's say we have a app which has categories and items. We have a view where we display all the categories, and a count of all the items inside each category. Again, I'm wondering what's better. To perform a MySQL query to count all the items in each category every single time the page is accessed? Or store the count in a field in the categories table and update when an item is added / deleted? I know it is redundant to store anything that can be calculated, but I worry that calculating fields or counting records might be slow as opposed to storing the data in a field. If it's not then please let me know, I just want to learn about when to use either method. On a small scale I guess it wouldn't matter either way, but apps like Facebook, would they really count the amount of friends you have every time someone views your profile or would they just store it as a field? I'd appreciate any responses to both of these scenarios, and any resource that might explain the benefits of calculating vs storing. Thanks in advance, Christian

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  • Silverlight 4 missing from VS 2010

    - by iheartso
    Hello, When I start a new Visual C# Silverlight project in the official release version (not the beta or the release candidate--the official release version) of Visual Studio 2010, I get only Silverlight 3 as an option in the Silverlight Version dropdown at the New Silverlight Application dialog box. I have installed SL 4, the SL4 tools for VS 2010, to no avail. I am running Windows XP SP3. Any ideas??? Thank you, Jon

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  • VS 2010 Web.config transformations for debugging

    - by Dirk
    I’m a fan of the new VS 2010 Web.config transformations. I use this feature for deployment purposes and wondered if it is possible to use them for debugging too. I think of using them in the IDE: I want to create different built configuration (with linked transformation configurations); choose one of them; start the web site in the IDE and debug the different configuration this way.

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  • FileInfo.MoveTo() vs File.Move()

    - by Eric
    Is there any difference between these two methods of moving a file? System.IO.FileInfo f = new System.IO.FileInfo(@"c:\foo.txt"); f.MoveTo(@"c:\bar.txt"); //vs System.IO.File.Move(@"c:\foo.txt", @"c:\bar.txt");

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  • VS 2008 Code Snippet Indentation

    - by Daniel
    In VS 2008, there are XML code snippets that seem to be pretty awesome :) However, it seems that the snippets we created do not indent properly. For example if we have the following code: { ... { ... { InsertSnippet here. We get something like: { ... { ... { FirstLineofSnippet SecondLineOfSnippet ThirdLineOfSnippet Is there any way to make it so that all lines keep the same indentation?

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  • Disable VB.NET 10 Features in VS 2010

    - by Keivan
    is there a way to disable visual basic 10 language features in VS 2010. our Dev team has moved to Visual studio 2010, but we still have to keep backwards compatibility with Visual Studio 2008. is there a way to disable the new language features to avoid any issues.

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  • Change font-smoothing in VS 2010

    - by HeavyWave
    Is there any way to make font smoothing more MacOS like in Visual Studio 2010? I used to do that with GDI++ in VS 2008, but obviously that won't work in new Visual Studio. Is it possible to tweak WPF font-smoothing manually?

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  • Python: if key in dict vs. try/except

    - by LeeMobile
    I have a question about idioms and readability, and there seems to be a clash of Python philosophies for this particular case: I want to build dictionary A from dictionary B. If a specific key does not exist in B, then do nothing and continue on. Which way is better? try: A["blah"] = B["blah"] except KeyError: pass or if "blah" in B: A["blah"] = B["blah"] "Do and ask for forgiveness" vs. "simplicity and explicitness". Which is better and why?

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  • Raising events vs direct method calls differences

    - by dotnetdev
    Hi Raising an event, will call its event handler. eg http://msdn.microsoft.com/en-us/library/aa645739%28VS.71%29.aspx What is the difference between using the events mechanism and direct calls to other methods (eg if a condition is met in method A(), call B() )? And what is the difference between consuming and raising events? Thanks

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  • ConcurrenctBag(Of MyType) Vs List(Of MyType)

    - by Ben
    What is the advantage of using a ConcurrentBag(Of MyType) against just using a List(Of MyType)? The MSDN page on the CB (http://msdn.microsoft.com/en-us/library/dd381779(v=VS.100).aspx) states that ConcurrentBag(Of T) is a thread-safe bag implementation, optimized for scenarios where the same thread will be both producing and consuming data stored in the bag So what is the advantage? I can understand the advantage of the other collection types in the Concurrency namespace, but this one puzzled me. Thanks.

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  • vs 2010 colors are darker than i set

    - by Genrih
    I have "Selected Text" color set to a default value in vs 2010 RGB 51,153,253. But really in text editor it is RGB 173,214,255 that is slightly darker. The same things are with some other colors, e.g. Resharper Dead Code. What can it be a problem and how should I solve it?

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  • Using VS Code Snippets with Resharper

    - by devoured elysium
    I am trying to use Code Contract's Code Snippets but since I turned Resharper back on it doesn't recognize them. On the other hand, it is recognizing some snippets I've implemented myself in the past. Any ideia of what might be the problem? I'm specifically trying to use cr and ce, which I think, don't collide with any other snippets (at least from what I see in the intellisense). I'm using R# 5 with VS 2010 Thanks

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  • Two imageViews vs one imageView and a canvas

    - by user3009842
    I have a bitmap and I want to scale it up to fill an ImageView and overlay the unscaled version of the bitmap on top. Which would be cheaper (in terms of memory and processor usage)? Using two ImageViews, one for each version of the bitmap Using a canvas and drawing on the singular bitmap, using one ImageView I saw this question about ImageView vs Canvas, but it doesn't address memory/processor concerns. My intuition says two ImageViews may use more RAM, while using a canvas would use more processing power while the drawing occurs.

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  • WPF inherited UserControl lost VS designer support

    - by PaN1C_Showt1Me
    Hi ! I' written this UserControl: <my:MyUserControl x:Class="MyClass" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:my="clr-namespace:MyNameSpace.MyControls;assembly=MyAssembly"> </my:MyUserControl> public partial class Editor : MyNameSpace.MyControls.MyUserControl {} Everything works, the control is shown in the VS 2008 Designer, but I cannot click directly in the elements and select them as it was with UserControl. Any idea how to solve it?

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