Questions tagged [memory]
Memory refers to the physical devices used to store programs or data on a temporary or permanent basis for use in a computer or other digital electronic device.
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Design Question - Storing timeseries in a key-value store
I'm looking for a sanity check my thinking around the memory layout of a key-value store.
We have a system that periodically polls and monitors on host-level jobs. On every poll, a given job emit can ...
- 147
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What is a suitable format for writing large amounts of data within few milliseconds
I have a c++ code that needs to store some data whenever an event is triggered. The data contains about 3000 floating point values. So each of these values needs to be written in a file when the event ...
- 133
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Refactoring a codebase from manual memory management to RAII
Edit: @Ben Cottrell's comment said this was similar to a question about spaghetti code. While both questions involve large codebases, mine addresses a specific technical pattern: manual memory ...
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Are contiguous objects contiguous in virtual memory or physical?
More or less what the title says.
Suppose we have a sequential container like vector in c++ that will store data contiguously.
When we say that the data is stored contiguously do we mean that it's ...
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C# List vs Dictionary cost vs benefit with complex keys
I am designing a program and I am looking to decide over a Dictionary vs a List.
Since I know I have unique values per item I imagined a Dictionary/List that looks like:
Dictionary<(int k1, string ...
- 141
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Protecting garbage collection data structure with reader-writer lock might not be appropriate?
I'm thinking about implementing garbage collection efficiently by protecting the structure that tracks allocations using reader-writer lock. However, I'm worried memory semantic may invalidate the ...
- 374
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Does Java keep stream objects in memory after mapping them?
Say I have the following stream:
List<Other> list = Stream
.of(
new MyObject(),
new MyObject()
)
.map(this::mapToOther)
.collect(toList())
;
So after this is ...
- 133
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Load and process (compressed) data from filesystem in the blink of an eye
We have a huge amount of queries hitting our API that request a minor or major extract of some huge files lying around on our mounted hard drives. The data needs to be extracted from the files and ...
- 493
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How to store an encrypted filesystem in a single file on disk on multiple platforms (maybe not portably), or alternatives
I'm in the very conceptual phase of designing an open source password manager that provides distributed Vaults that can be simultaneously accessed and managed from multiple devices with the promise of ...
- 111
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Sandboxing interpreted code
I have a little pet compiler project that generates bytecode interpreted by a virtual machine. The language is kind of low-level, as it allows the user to manually allocate memory and dereference any ...
- 127
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Optimizing Flash Memory Writes in Embedded Systems with Unpredictable Power Loss
I'm working on an embedded C++ project that involves logging certain types of statistical data (like successful accesses, failed attempts, and other events) to the flash memory (just incrementing ...
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Is the maximum number of outstanding load instructions limited by the CPU architecture or the program?
I'm reviewing some lecture slides and had a question on the following slide :
Assumptions (8 clocks to transfer data) Up to 3 outstanding load requests.
The slide is illustrating that the number of ...
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What is the best way to retain a local object which is performing an asynchronous task?
My problem is the following: inside a method I'm creating an object like this:
MyObject* myObject = [MyObject new];
Then I want it to perform an asynchronous task like this:
[myObject ...
- 109
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C++ wrapper around raw array - memory management
I have simple wrapper class around C-style array. I don't want to use std::vector since I want to have only one array even if I do copy of the struct. With std::vector the vector is also copied.
...
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what algorithm does the malloc function in the c language standard library use? And why it so fast?
Based on the data structure of the AVL tree, I implemented a memory manager that does the best matching according to the size. I originally thought that the speed would be fast and the length of the ...
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