oven-sh/bun

node:process.threadCpuUsage is not yet implemented

Open

#23890 opened on Oct 21, 2025

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 (2 comments) (0 reactions) (0 assignees)Rust (90,348 stars) (4,486 forks)batch import
bugconfirmed buggood first issuenode:process

Description

What version of Bun is running?

1.3.1-canary.103+7750afa29

What platform is your computer?

Darwin 24.5.0 arm64 arm

What steps can reproduce the bug?

❯ node -p 'process.threadCpuUsage'
[Function: threadCpuUsage]

❯ bun -p 'process.threadCpuUsage'
undefined

What is the expected behavior?

No response

What do you see instead?

No response

Additional information

http://nodejs.org/api/process.html#processthreadcpuusagepreviousvalue

Contributor guide

Tech stack
javascriptnodejsrust
Domain
backendperformanceobservability
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
RustNode.js process APIOperating system threads
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate Bun's implementation of Node.js process APIs, particularly how process.cpuUsage is implemented in src/node/process/. The threadCpuUsage function should be added to the process module with similar native bindings. Consult the Node.js documentation for the expected signature and behavior.