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Favourite performance tuning tricks [closed]
...uild incrementally or teardown / rebuild
See what the query plan is with SET SHOWPLAN ON
See what’s actually happenning with SET STATS IO ON
Force an index using the pragma: (index: myindex)
Force the table order using SET FORCEPLAN ON
Parameter Sniffing:
Break Stored Procedure into 2
call...
Multiple Inheritance in C#
... properties, eg:
public interface ISteerable { SteeringWheel wheel { get; set; } }
public interface IBrakable { BrakePedal brake { get; set; } }
public class Vehicle : ISteerable, IBrakable
{
public SteeringWheel wheel { get; set; }
public BrakePedal brake { get; set; }
public Vehic...
What is the maximum size of a web browser's cookie's key?
...he cookie (at least in JavaScript). A cookie is deleted by updating it and setting it to expire. If the name is too big, say 4090 bytes, I found that I could not set an expiry date. I only looked into this out of interest, not that I plan to have a name that big.
To read more about it, here are the...
How can I get System variable value in Java?
...bles are the same as environment variables. User environment variables are set per user and are different whenever a different user logs in. System wide environment variables are the same no matter what user logs on.
To access either the current value of a system wide variable or a user variable in...
How do you create a toggle button?
... with this answer, you can also use this kind of style that is like mobile settings toggler.
HTML
<a href="#" class="toggler">&nbsp;</a>
<a href="#" class="toggler off">&nbsp;</a>
<a href="#" class="toggler">&nbsp;</a>
CSS
a.toggler {
backgr...
Fastest way to get the first object from a queryset in django?
Often I find myself wanting to get the first object from a queryset in Django, or return None if there aren't any. There are lots of ways to do this which all work. But I'm wondering which is the most performant.
...
Passing arguments to C# generic new() of templated type
...ions of C#. I would like to make my classes immutable: Having just private setters would make the class impossible to be in an invalid state by side effects. I also like to use that Func and lambda, but I know it still is a problem in bussiness world as generally programmers don't know lambdas yet a...
iPhone Simulator - Simulate a slow connection?
...
Yosemite: failed to set speed limit
– Injectios
Jan 15 '15 at 13:30
2
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Better way to shuffle two numpy arrays in unison
..., and these are the only "random" elements in the shuffle algorithm. By resetting the state, you ensure that the calls to the random number generator will give the same results in the second call to shuffle(), so the whole algorithm will generate the same permutation.
If you don't like this, a dif...
Specifying a custom DateTime format when serializing with Json.Net
...
You are on the right track. Since you said you can't modify the global settings, then the next best thing is to apply the JsonConverter attribute on an as-needed basis, as you suggested. It turns out Json.Net already has a built-in IsoDateTimeConverter that lets you specify the date format. Un...