All Questions
Tagged with performance concurrency
348
questions
1
vote
0
answers
52
views
How to reduce cache miss in SPSC queue pop function?
I am working on optimizing a Single Producer Single Consumer (SPSC) queue in C++. The following is the miniman reproducible example for my implementation:
#include <atomic>
#include <cstddef&...
- 31
0
votes
0
answers
7
views
CherryPy web server chokes on 50 concurrent users
I have a Cherrypy webserver that runs fine UNTIL it gets more then 50 concurrent users. Then the web server does not respond any more and times out at the web client.
This happens with plain static ...
- 131
0
votes
0
answers
77
views
How to Optimize Python's Multithreaded Performance for Real-Time Machine Learning Predictions?
I'm currently developing a real-time machine learning application using Python, and I'm facing challenges with optimizing multithreaded performance to reduce latency in model predictions. Even with ...
- 83
0
votes
1
answer
28
views
Why do we still need locks with atomic operations?
The example code is as follows:
class ResourcePool{
public:
...
static inline ResourcePool* singleton()
{
ResourcePool* p = _singleton.load(butil::memory_order_consume);
...
- 23
0
votes
0
answers
59
views
Can MySQL update concurrent a table with different rows
I have a table (users) with 20M records.
I need to update column user_image (this is indexed colum) to a new value.
Now, I am using PHP + amphp/amp (https://github.com/amphp/amp) to run multiple ...
- 51
-3
votes
1
answer
62
views
Why is this concurrent code slower than the serial code? (Go) [closed]
I wanted to try using a concurrent solution to problem 206 (Reverse a Linked List) on LeetCode, so I wrote this:
func reverseList(head *ListNode) *ListNode {
var prev, temp *ListNode
cur, ch :=...
2
votes
1
answer
55
views
Benchmarking ways to avoid processing duplicate messages in a Go concurrent environment
I have a Go program that receives TCP messages from many peers, each on its own go-routine. If I have already received a message from a peer (which is a []byte), I don't want to process it again. To ...
- 1,831
1
vote
2
answers
67
views
Concurrency Error using Entity Framework in case of different dbcontext
I have a given entity 'Student' with application based concurrency control defined on 'LastModified'.
public class Student
{
public int Id { get; set; }
public string Name { get; set; } = null!...
- 11
0
votes
0
answers
64
views
Performance / Concurrency Issue in Pine Script / Trading View
Included is the Code of an indicator which list stocks that are satisfying the conditions of PVT (Price Volume Trend), Volume across three timeframes W, D and 2H.
Because of the Pinescript constraint( ...
0
votes
1
answer
121
views
How can I optimize this code? Concurrent requests with python (concurrent library)
I am creating an endpoint in my API (FastAPI) that needs to send multiple requests to an external API with very large responses. The external API is paginated, and I need to get all the pages and ...
- 126
2
votes
1
answer
2k
views
Why does Rust performance of `Arc` vs `Rc` vary with the size of the referenced vector?
While doing the rustlings exercises on smart pointers, I was wondering what the performance cost of using an Arc which references a list of numbers is if multiple threads are reading this list.
So I ...
- 349
0
votes
0
answers
23
views
Transaction affects time of computation?
Consider:
with transaction.atomic():
job = Job.objects.select_for_update().get(id=job_id)
texts = pickle.loads(job.job_body)
timer = Timer()
print("Computing embedding for:", ...
- 7,801
-1
votes
3
answers
363
views
How is Rust --release build slower than Go?
I'm trying to learn about Rust's concurrency and parallel computing and threw together a small script that iterates over a vector of vectors like it was an image's pixels. Since at first I was trying ...
- 21
1
vote
2
answers
79
views
`C++ concurrency in Action` chapter 4 doubts [closed]
I am currently reading C++ Concurrency in Action 2nd edition, page 111 (Chapter 4). It's a somewhat long question.
So the author is showing how to write a good concurrent version of a function that ...
- 97
0
votes
1
answer
568
views
How to simulate concurrent users in JMeter if there are multiple requests in a thread group and first requests in dependent on the previous request?
I have a load test case, where the user first request which generate token will be passed to second request and second request ID to third request. The script works fine if it is executed for 1 user ...
- 153