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memory management - C Array Instantiation - Stack or Heap Allocation?
    I guarantee that this question has been asked before, but I haven't been able to find it via search; sorry ... Thanks in advance for your help. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - How to base64-decode large files in PHP
    My PHP web application has an API that can recieve reasonably large files (up to 32 MB) which are base64 ... some external command? Any thought? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - Clear UIWebView content upon dismissal of modal view (iPhone OS 3.0)
    I currently have a UIWebView that is displayed within a modal view. It is basically a detail view that ... thoughts from the wizened masses? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - Why do logicals (booleans) in R require 4 bytes?
    For a vector of logical values, why does R allocate 4 bytes, when a bit vector would consume 1 bit per ... thorough set of answers and insights. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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580 views
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memory management - How to declare and use huge arrays of 1 billion integers in C?
    I'm implementing a sequential program for sorting like quicksort. I would like to test the performance of my ... . Thanks for your replies. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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769 views
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memory - What do square brackets mean in x86 assembly?
    I'm very new to assembly, and have some very basic questions. What is the difference between these four commands ... the point of the brackets? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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614 views
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memory - How important is it to unset variables in PHP?
    I am somewhat new to PHP, and I am wondering: How important is it to unset variables in PHP? I know in ... using unset and not using unset? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - Why does a 32-bit OS support 4 GB of RAM?
    Just reading some notes in a purdue lecture about OSs, and it says: A program sees memory as an array of bytes that ... to 4GB-1) Why 4 GB? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory management - Prevent Fragment recovery in Android
    We are using Fragments and we don't need them to be automatically recovered when the Activity is recreated. ... of automatic memory cleaning? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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546 views
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memory management - Swift delegation - when to use weak pointer on delegate
    Can someone explain when and when not to use a 'weak' assignment to a delegate pointer in Swift, and ... delegates aren't weakly referenced. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory management - storing android application data on SD Card
    Is there a way to store android application data on the SD card instead of in the internal memory? I know ... ? How does everyone handle this? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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734 views
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memory - python- how to display size of all variables
    I want to print the memory size of all variables in my scope simultaneously. Something similar to: for obj in ... or split into batches. Ideas? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - Why does my garbage collection log show 3.8GB as the max available heap size while I have allocated 4GB as the max heap size?
    I have a 64-bit hotspot JDK version 1.7.0 installed on a 64-bit RHEL 6 machine. I use the following JVM ... allocated to the JVM. Why is that? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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887 views
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memory - windbg crash dump analysis, high cpu usage -
    My application(web api) is suffering with high cpu, while analyzing dump, I see my most of the threads have this ... cause of high cpu usage ? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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483 views
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memory - maximum size of a matrix in R
    I am using igraph to do some network analysis. As part of that, I have to create a matrix with 2 columns ... was using to create that matrix. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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549 views
1 answer
memory - How to get largest possible precision? (Python - Decimal)
    I'm using the Decimal class for operations that requires precision. I would like to use 'largest possible ... .maxsize) >> 9223372036854775807 See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory - How to destroy java objects?
    Well, I have developed a java application using several objects relationships that make the memory usage too ... references to each others? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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460 views
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memory management - Difference between local allocatable and automatic arrays
    I am interested in the difference between alloc_array and automatic_array in the following extract: subroutine mysub(n) ... do mention them. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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585 views
1 answer
memory management - java.lang.ClassCastException: android.view.AbsSavedState$1 cannot be cast to android.support.v7.widget.Toolbar$SavedState
    My app gets crashed frequently when it goes from background to foreground. Scenerio: Suppose iam playing any games ... issue?Thanks in advance. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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memory leaks - java.lang.OutOfMemoryError: unable to create new native thread
    i saw comment like this one place i have seen this problem is if you keep creating threads, and instead ... -Xmx1024m -XX:MaxPermSize=450m See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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560 views
1 answer
memory - No garbage collection while PowerShell pipeline is executing
    UPDATE: The following bug seems to be resolved with PowerShell 5. The bug remains in 3 and 4. So don't ... Out-Null produces the same problem. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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640 views
1 answer
memory management - What does 'corrupted double-linked list' mean
    I've recently gotten the following error from my PHP: WARNING: [pool www] child 42475 said into stderr: "*** ... when I compile and execute it? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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611 views
1 answer
memory management - bss segment in C
    In one of the answers to the question "Regarding the bss segment and data segment in Unix", I see ... anyone justify the mentioned statement? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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537 views
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memory - Android: Cursor Window is full
    W/CursorWindow(15677): Window is full: requested allocation 2195889 bytes, free space 2096720 bytes, window size ... limited to 2097152 bytes. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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378 views
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memory - Why does java wait so long to run the garbage collector?
    I am building a Java web app, using the Play! Framework. I'm hosting it on playapps.net. I have been ... which for now is working fine. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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573 views
1 answer
memory management - C++ is it necessary to delete dynamically allocated objects at the end of the main scope?
    When using dynamically allocated objects in C++ eg: TGraph* A = new TGraph(...); One should always delete ... need to worry about memory leaks. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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408 views
1 answer
memory management - Is it true, that modern OS may skip copy when realloc is called
    While reading the https://stackoverflow.com/a/3190489/196561 I have a question. What the Qt authors says in ... some tests of mremap vs memcpy See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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685 views
1 answer
memory management - C++ stack vs heap allocation
    I was wondering when should I allocate a class on the stack in C++? I have a strong background in ... kind of optimisation in embedded systems? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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