heap-memory

问题 This question already has answers here : Where the 'Type' of a reference value is stored in memory? (3 answers) Do value types have Type objects? (2 answers) Closed 19 days ago . I am reading a book which shows how a class instance is created in heap as the picture below shows: internal class Employee { public Int32 GetYearsEmployed() { ... } public virtual String GetProgressReport() { ... } public static Employee Lookup(String name) { ... } } internal sealed class Manager : Employee { public

问题 I am working on a project which is developing with NextJs and ReactJs. Suddenly this project showing Allocation failed - JavaScript heap out of memory problem. I have tried all the resources online but, those are not working for me. I think, maybe something error occurred in next.config.js or webpack but, I am not sure about it. package.json { "name": "personal-blog", "version": "0.1.0", "private": true, "scripts": { "dev": "next dev", "build": "next build", "start": "next start" },

问题 I read many post about Java Heap. I saw if we get java.lang.OutOfMemoryError we should increase -Xmx to address this issue. for e.g java -Xmx2048m -Xms256m This will increase heap memory used by Java to 2048MB. Now comes to the question that is knocking on my head. Question with reference to above settings : Does Java waits till its HEAP space reach to 256MB before calling garbage collector ? Is this the reason for production we want to have same value for -XMx and -Xms so that Java does not

问题 I read many post about Java Heap. I saw if we get java.lang.OutOfMemoryError we should increase -Xmx to address this issue. for e.g java -Xmx2048m -Xms256m This will increase heap memory used by Java to 2048MB. Now comes to the question that is knocking on my head. Question with reference to above settings : Does Java waits till its HEAP space reach to 256MB before calling garbage collector ? Is this the reason for production we want to have same value for -XMx and -Xms so that Java does not

问题 I read many post about Java Heap. I saw if we get java.lang.OutOfMemoryError we should increase -Xmx to address this issue. for e.g java -Xmx2048m -Xms256m This will increase heap memory used by Java to 2048MB. Now comes to the question that is knocking on my head. Question with reference to above settings : Does Java waits till its HEAP space reach to 256MB before calling garbage collector ? Is this the reason for production we want to have same value for -XMx and -Xms so that Java does not

问题 This is an empirical assumption (that allocating is faster then de-allocating). This is also one of the reason, i guess, why heap based storages (like STL containers or else) choose to not return currently unused memory to the system (that is why shrink-to-fit idiom was born). And we shouldn't confuse, of course, ' heap ' memory with the ' heap '-like data structures. So why de-allocation is slower ? Is it Windows -specific (i see it on Win 8.1 ) or OS independent? Is there some C++ specific

问题 This is an empirical assumption (that allocating is faster then de-allocating). This is also one of the reason, i guess, why heap based storages (like STL containers or else) choose to not return currently unused memory to the system (that is why shrink-to-fit idiom was born). And we shouldn't confuse, of course, ' heap ' memory with the ' heap '-like data structures. So why de-allocation is slower ? Is it Windows -specific (i see it on Win 8.1 ) or OS independent? Is there some C++ specific

问题 below is a code example from a book to show when a value type will be boxed: internal struct Point { private readonly Int32 m_x, m_y; public Point(Int32 x, Int32 y) { m_x = x; m_y = y; } //Override ToString method inherited from System.ValueType public override string ToString() { return String.Format("({0}, {1})", m_x.ToString(), m_y.ToString()); } } class Program { static void Main(string[] args) { Point p1 = new Point(10, 10); p1.ToString(); } } and the author says: In the call to ToString

问题 below is a code example from a book to show when a value type will be boxed: internal struct Point { private readonly Int32 m_x, m_y; public Point(Int32 x, Int32 y) { m_x = x; m_y = y; } //Override ToString method inherited from System.ValueType public override string ToString() { return String.Format("({0}, {1})", m_x.ToString(), m_y.ToString()); } } class Program { static void Main(string[] args) { Point p1 = new Point(10, 10); p1.ToString(); } } and the author says: In the call to ToString

问题 below is a code example from a book to show when a value type will be boxed: internal struct Point { private readonly Int32 m_x, m_y; public Point(Int32 x, Int32 y) { m_x = x; m_y = y; } //Override ToString method inherited from System.ValueType public override string ToString() { return String.Format("({0}, {1})", m_x.ToString(), m_y.ToString()); } } class Program { static void Main(string[] args) { Point p1 = new Point(10, 10); p1.ToString(); } } and the author says: In the call to ToString