74,453 questions
Score of -2
0 answers
120 views
What keeps Go’s poll.FD reference count above zero so that net.Conn.Close() blocks forever? [closed]
On Go 1.26, linux/arm64 (AWS Graviton), a plain TCP net.Conn.Close() blocks forever in internal/poll.(*FD).Close. This goroutine was stuck for 8+ minutes:
goroutine 25698717 [semacquire, 8 minutes]:
...
- reputation score 9
Score of 3
1 answer
185 views
How do I constrain a generic type to allow struct types that embed a given type?
I have a base struct like this:
type State struct {
Alerts []string
}
And two structs that embed it, like this:
type StateA struct {
State
A string
}
type StateB struct {
State
B ...
- reputation score 202
Score of -2
1 answer
127 views
Trying to Improve performance (throughput+latency) on my redis clusters clone written in Go [closed]
I recently built a key-value store (redis compatible, for the most part) in Golang. It uses Docker containers to simulate redis clusters / cluster nodes. I benchmarked it and used the pprof package to ...
- reputation score 7
Score of 0
1 answer
118 views
K6 - Split dataset among VUs without overlap
I am using the K6 tool to perform some load test on some of my services. I have a dataset of captured requests that I'd like to replay that is quite big and thus I'd like to use the sharedArray ...
- reputation score 100
Score of 0
2 answers
274 views
How to judge which context timed out
Studying Go now, not my 1st language. I think I faced a subtle conflict between idioms. Say I did this:
//Returns context.DeadlineExceeded as error if failed because ctx timed out.
func ...
- reputation score 710
Score of -3
0 answers
194 views
go 1.27 might modify go.work.sum on start?
I have a project using go.work, I upgraded to go 1.27 recently, and seems when start go application, it might change go.work.sum automatically sometimes, this has happened a few times in last 10 days.
...
- reputation score 26021
Score of 1
1 answer
107 views
How to properly trigger DTO validation in Fuego
I am using the Fuego in GIN for my project. I have defined DTO structs with validation tags. Here is my struct:
type GetAllUserQuery struct {
Limit int `query:"limit" validate:"...
- reputation score 19
Score of 1
2 answers
248 views
How should a JSON parser represent JSON numbers in Go?
I'm implementing a JSON parser. According to JSON rules, a number can be an integer, a negative number, a decimal, or use exponent notation, like
42, -42, 3.14, 0.5, 1e10, 2.5e-3
I currently have a ...
- reputation score 19
Score of 2
0 answers
189 views
Are there any performance implications of Pub/Sub message ordering on the publisher only?
I am maintaining an internal Go library, which has a pubsub package. Currently, it doesn't support message ordering, but I would like to enable it. I want to make it as simple as possible by using ...
- reputation score 1083
Score of 2
1 answer
162 views
How to change the color of window caption in Gio UI on Wayland
I'm looking at golang library https://gioui.org/
When I run a hello world example:
package main
import (
"image/color"
"log"
"os"
"gioui.org/app&...
- reputation score 21
Score of 1
1 answer
172 views
How can I generate human-friendly numeric scale values between two float64 values in Go?
I need to generate a set of evenly spaced numeric values covering a given range. This is mainly intended for things such as chart axes, scales, thresholds, and similar UI representations.
Simply ...
- reputation score 21444
Score of 2
1 answer
154 views
How to triage json.SemanticError when using encoding/json/v2?
When using the new encoding/json/v2 package, and unmarshaling some JSON, it will potentially return a json.SemanticError error.
As far as I can see, json.SemanticError is returned when the JSON is ...
- reputation score 71
Score of 1
2 answers
170 views
How to call Go WASM from a TypeScript React frontend?
I am working on a web app with the following architecture:
The frontend is a React app written in TypeScript.
The "backend" is written in Go, and compiled to WASM for distribution with the ...
- reputation score 427
Score of -1
1 answer
748 views
How to redirect a runtime fatal error to a logger?
In a Go program I got this error message:
fatal error: concurrent map writes
The message is shown in the terminal window of VS Code. But in my log there is nothing, which make sense because log....
- reputation score 1519
Score of 2
2 answers
403 views
How can I implement Java-like enums in Go?
Unlike Go's iota-based enums, Java enums are singleton objects. Each enum constant is a unique instance that can carry additional state and behavior, while also providing name(), ordinal(), values(), ...
- reputation score 21444