#garbage-collection

Resolved: How JavaScript closures are garbage collected #fix #it #programming

How JavaScript closures are garbage collected

I’ve logged the following Chrome bug, which has led to many serious and non-obvious memory leaks in my code:

(These results use Chrome Dev Tools’ memory profiler, which runs the GC, and then takes a heap snapshot of everything not garbaged collected.)

In the code below, the someClass instance is garbage collected (good):

var someClass = function()…

How to: Do you need to dispose of objects and set them to null? #computers #it #fix

Do you need to dispose of objects and set them to null?

Do you need to dispose of objects and set them to null, or will the garbage collector clean them up when they go out of scope?

Answer [by Andre]: Do you need to dispose of objects and set them to null?

If they implement the IDisposable interface then you should dispose them. The garbage collector will take care of the rest.

EDIT: best is…

How to: How do you prevent IDisposable from spreading to all your classes?

How do you prevent IDisposable from spreading to all your classes? Start with these simple classes…

Let’s say I have a simple set of classes like this:

class Bus { Driver busDriver = new Driver(); } class Driver { Shoe[] shoes = { new Shoe(), new Shoe() }; } class Shoe { Shoelace lace = new Shoelace(); } class Shoelace { bool tied = false; }

A Bus has a Driver, the Driver has two Shoes, each Shoe

How to: Do event handlers stop garbage collection from occuring?

Do event handlers stop garbage collection from occuring?

If I have the following code:

MyClass pClass = new MyClass(); pClass.MyEvent += MyFunction; pClass = null;

Will pClass be garbage collected? Or will it hang around still firing its events whenever they occur? Will I need to do the following in order to allow garbage collection?

MyClass pClass = new MyClass(); pClass.MyEvent += MyFunction;…

How to: How does a garbage collector avoid an infinite loop here?

How does a garbage collector avoid an infinite loop here?

Consider the following C# program, I submitted it on codegolf as an answer to create a loop without looping:

class P{ static int x=0; ~P(){ System.Console.WriteLine(++x); new P(); } static void Main(){ new P(); } }

This program looks like an infinite loop in my inspection, but it seems to run for several thousand iterations, and then the…

When should I use GC.SuppressFinalize()?

In .NET, under which circumstances should I use GC.SuppressFinalize()?

What advantage(s) does using this method give me?

Answer: When should I use GC.SuppressFinalize()?

That method must be called on the Dispose method of objects that implements the IDisposable, in this way the GC wouldn’t call the finalizer another time if someones calls the Dispose…

Fixed Deleting Objects in JavaScript #dev #it #asnwer

Deleting Objects in JavaScript

I’m a bit confused with JavaScript’s delete operator. Take the following piece of code:

var obj = { helloText: "Hello World!" }; var foo = obj; delete obj;

After this piece of code has been executed, obj is null, but foo still refers to an object exactly like obj. I’m guessing this object is the same object that foo pointed to.

This confuses me, because I expected…

Fixed Error java.lang.OutOfMemoryError: GC overhead limit exceeded #dev #it #asnwer

Error java.lang.OutOfMemoryError: GC overhead limit exceeded

I get this error message as I execute my JUnit tests:

java.lang.OutOfMemoryError: GC overhead limit exceeded

I know what an OutOfMemoryError is, but what does GC overhead limit mean? How can I solve this?

Answer: Error java.lang.OutOfMemoryError: GC overhead limit exceeded

If you are sure there are no memory leaksin your program, try…