Search Results

Search found 13227 results on 530 pages for 'memory efficiency'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 327/530 | < Previous Page | 323 324 325 326 327 328 329 330 331 332 333 334  | Next Page >

  • Why is the Objective-C Boolean data type defined as a signed char?

    - by EddieCatflap
    Something that has piqued my interest is Objective-C's BOOL type definition. Why is it defined as a signed char (which could cause unexpected behaviour if a value greater than 1 byte in length is assigned to it) rather than as an int, as C does (much less margin for error: a zero value is false, a non-zero value is true)? The only reason I can think of is the Objective-C designers micro-optimising storage because the char will use less memory than the int. Please can someone enlighten me?

    Read the article

  • Saving objects in servlet session and java.io.NotSerializableException

    - by EugeneP
    SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writi ng aborted; java.io.NotSerializableException: That means this object cannot be persisted on hard disk. Does it imply that it's not safe to keep in Session objects that do not implement "Serializable"? I haven't heard that there are limitations on saving non-serializable objects in Session object. It simply means that Tomcat will always keep them in memory, right?

    Read the article

  • Saving objects in servlet session and java.io.NotSerializableException

    - by EugeneP
    SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writi ng aborted; java.io.NotSerializableException: That means this object cannot be persisted on hard disk. Does it imply that it's not safe to keep in Session objects that do not implement "Serializable"? I haven't heard that there are limitations on saving non-serializable objects in Session object. It simply means that Tomcat will always keep them in memory, right?

    Read the article

  • Google Contacts and Phone Contacts : difference

    - by Rahul
    hiiiiiiiiiiiii i got Htc Hero. There are 2 kind of Contacts marked as Google and Phone. Both are stored in phone memory. If i want to access only Phone Tagged Contact info what should i do? And if i want to convert Google Tagged Contacts to Phone Tagged Contacts what should i do? thanks

    Read the article

  • Most suitable collection for multithreading requests?

    - by Raj Aththanayake
    I have ~10,000 records would like to keep in a collection in memory and execute LINQ queries against it. This collection should be available for all the users in the application domain and can access concurrently. I’m looking for a .NET collection that supports multithreading can query asynchronously and efficiently without any threading issues. Any suggestions on deciding a collection for this?

    Read the article

  • Dynamic Dispatch without Virtual Functions

    - by Kristopher Johnson
    I've got some legacy code that, instead of virtual functions, uses a kind field to do dynamic dispatch. It looks something like this: // Base struct shared by all subtypes // Plain-old data; can't use virtual functions struct POD { int kind; int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); }; enum Kind { Kind_Derived1, Kind_Derived2, Kind_Derived3 }; struct Derived1: POD { Derived1(): kind(Kind_Derived1) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; struct Derived2: POD { Derived2(): kind(Kind_Derived2) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; struct Derived3: POD { Derived3(): kind(Kind_Derived3) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; and then the POD class's function members are implemented like this: int POD::GetFoo() { // Call kind-specific function switch (kind) { case Kind_Derived1: { Derived1 *pDerived1 = static_cast<Derived1*>(this); return pDerived1->GetFoo(); } case Kind_Derived2: { Derived2 *pDerived2 = static_cast<Derived2*>(this); return pDerived2->GetFoo(); } case Kind_Derived3: { Derived3 *pDerived3 = static_cast<Derived3*>(this); return pDerived3->GetFoo(); } default: throw UnknownKindException(kind, "GetFoo"); } } POD::GetBar(), POD::GetBaz(), POD::GetXyzzy(), and other members are implemented similarly. This example is simplified. The actual code has about a dozen different subtypes of POD, and a couple dozen methods. New subtypes of POD and new methods are added pretty frequently, and so every time we do that, we have to update all these switch statements. The typical way to handle this would be to declare the function members virtual in the POD class, but we can't do that because the objects reside in shared memory. There is a lot of code that depends on these structs being plain-old-data, so even if I could figure out some way to have virtual functions in shared-memory objects, I wouldn't want to do that. So, I'm looking for suggestions as to the best way to clean this up so that all the knowledge of how to call the subtype methods is centralized in one place, rather than scattered among a couple dozen switch statements in a couple dozen functions. What occurs to me is that I can create some sort of adapter class that wraps a POD and uses templates to minimize the redundancy. But before I start down that path, I'd like to know how others have dealt with this.

    Read the article

  • Encrypt file using M2Crypto

    - by Bear
    It is known that I can read the whole file content in memory and encrypt it using the following code. contents = fin.read() cipher = M2Crypto.EVP.Cipher(alg="aes_128_cbc", key = aes_key, iv = aes_iv, op = 1) encryptedContents = cipher.update(contents) encryptedContents += cipher.final() But what if the file size is large, is there a way for me to pass the input stream to M2Crypto instead of reading the whole file first?

    Read the article

  • Visual Studio Solution: static or shared projects?

    - by goodrone
    When a whole project (solution) consists of multiple subprojects (.vcproj), what is a preferable way to tie them: as static libraries or as shared libraries? Assuming that those subprojects are not used elsewhere, the shared libraries approach shouldn't decrease memory usage or load time.

    Read the article

  • How to automatically monitor and limit resource of process on Windows

    - by Nat
    On Linux, normally I use ptrace function to trace all syscall, and kill the process if the it tries to do anything harmful to my machine, such as system("shutdown -s -t 00") or so. Is there a way for me to do this on Windows? EDIT: I want to write Sandbox program to limit time and memory usage of its child that can work on both Windows and Linux, and now it can only run on Linux via ptrace

    Read the article

  • How to create newline in a rebol block ?

    - by Rebol Tutorial
    let's say I have a config.txt which contains: "param11" "param12" "param21" "param22" I'll load it in memory with config: load %config.txt I can save it back with save %config.txt config So far so good. Now the problem occurs for me when I want to add "param31" "param32" I have tried append config reduce [newline "param31" "param32"] save %config.txt config But that doesn't give the expected result "param11" "param12" "param21" "param22" "param31" "param32" but this instead "param11" "param12" "param21" "param22" #"^/" "param31" "param32" So how to ?

    Read the article

  • fetchBatchSize to be same as fetchLimit

    - by user1730622
    What does it mean to have fetchBatchSize to be the same as fetchLimit, say both are set to be 5. My understanding is that, with the fetchLimit, then only 5 records will be in the fetch result set; and additionally with the fetchBatchSize, only the ids/identities of the records will be read to the memory, and then the full records won't be retrieved until they are accessed. Is that a correct understanding?

    Read the article

  • What is the meaning of this C++ Error std::length_error

    - by Janusz
    While running my program I get this Error: terminate called after throwing an instance of 'std::length_error' what(): basic_string::_S_create Abort trap I know that you can't do much without the code but I think that error is to deep in the code to copy all of it. Maybe I can figure it out if I understand what this error means. Is this a sign for an issue with reading or writing at the wrong memory address? Is there something I can do to get more information about the problem from my program?

    Read the article

  • How to load MS Word document in C# (.NET)?

    - by Skuta
    Hi, How do I load MS Word document (.doc and .docx) to memory (variable) without doing this?: wordApp.Documents.Open I don't want to open MS Word, I just want that text inside. You gave me answer for DOCX, but what about DOC? I want free and high performance solution - not to open 12.000 instances of Word to process all of them. :( Aspose is commercial product, and 900$ is a way too much for what I do.

    Read the article

  • If you stick to standard coding in .NET, is there reason to manually invoke the GC or run finalizers

    - by Matt
    If you stick to managed code and standard coding (nothing that does unconventional things withe CLR) in .NET, is there any reason to manually invoke the GC or request to run finalizers on unreferenced objects? The reason I ask is thaty I have an app that grows huge in Working Memory set. I'm wondering if calling System.GC.Collect(); and System.GC.RunFinalizers(); would help, and if it would force anything that wouldn't be done by the CLR normally anyways.

    Read the article

  • How to use length indicator in a C++ program

    - by cj
    I want to make a program in C++ that reads a file where each field will have a number before it that indicates how long it is. The problem is I read every record in object of a class; how do I make the attributes of the class dynamic? For example if the field is "john" it will read it in a 4 char array. I don't want to make an array of 1000 elements as minimum memory usage is very important.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 323 324 325 326 327 328 329 330 331 332 333 334  | Next Page >