[PR #1156] Use sync.Map in updatechannel #13358

New Issue

saavagebueno · 2026-08-05T02:08:12-04:00

saavagebueno commented

2026-08-05 02:08:12 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/1156

State: closed
Merged: No

Describe your changes

The sync.Map is part of Golang and looks a better fit for the case of concurrently accessing the map of the update channels.

The Map type is optimized for two common use cases: 
(1) when the entry for a given key is only ever written once but read many times, as in caches that only grow, or 
(2) when multiple goroutines read, write, and overwrite entries for disjoint sets of keys. 
In these two cases, the use of a Map may significantly reduce lock contention compared to a Go map paired with a separate Mutex or RWMutex.

Issue ticket number and link

Checklist

Is it a bug fix
Is a typo/documentation fix
Is a feature enhancement
It is a refactor
Created tests that fail without the change (if possible)
Extended the README / documentation, if necessary

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/1156 **State:** closed **Merged:** No --- ## Describe your changes The [sync.Map](https://pkg.go.dev/sync#Map) is part of Golang and looks a better fit for the case of concurrently accessing the map of the update channels. ``` The Map type is optimized for two common use cases: (1) when the entry for a given key is only ever written once but read many times, as in caches that only grow, or (2) when multiple goroutines read, write, and overwrite entries for disjoint sets of keys. In these two cases, the use of a Map may significantly reduce lock contention compared to a Go map paired with a separate Mutex or RWMutex. ``` ## Issue ticket number and link ### Checklist - [ ] Is it a bug fix - [ ] Is a typo/documentation fix - [x] Is a feature enhancement - [x] It is a refactor - [ ] Created tests that fail without the change (if possible) - [ ] Extended the README / documentation, if necessary

saavagebueno added the pull-request label 2026-08-05 02:08:12 -04:00

saavagebueno closed this issue

2026-08-05 02:08:12 -04:00

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Reference: DYNR/netbird#13358