Link to the code that reproduces this issue
https://github.com/SuperNiceDev/nextjs-server-cpu-issue
To Reproduce
1 . Install Next.js (15.2.2) project and run dev mode on macOS (Sequoia) with node v22.14.0
2. Open project in browser (http://localhost:3000/)
3. Open macOS process monitor and search for next-server (v15.2.2)
4. See next-server (v15.2.2) process idles from 15% to 20% cpu usage
Current vs. Expected behavior
next-server (v14.2.8) process idles from 0% to 3% cpu usage
Provide environment information
Operating System:
Platform: darwin
Arch: arm64
Version: Darwin Kernel Version 24.3.0: Thu Jan 2 20:24:06 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T8103
Available memory (MB): 16384
Available CPU cores: 8
Binaries:
Node: 22.14.0
npm: 10.9.2
Yarn: 1.22.19
pnpm: 9.14.1
Relevant Packages:
next: 15.2.2 // Latest available version is detected (15.2.2).
eslint-config-next: 15.2.2
react: 19.0.0
react-dom: 19.0.0
typescript: 5.8.2
Next.js Config:
output: N/A
Which area(s) are affected? (Select all that apply)
Performance
Which stage(s) are affected? (Select all that apply)
next dev (local)
Additional context
No response
Link to the code that reproduces this issue
https://github.com/SuperNiceDev/nextjs-server-cpu-issue
To Reproduce
1 . Install Next.js (15.2.2) project and run dev mode on macOS (Sequoia) with node v22.14.0
2. Open project in browser (http://localhost:3000/)
3. Open macOS process monitor and search for next-server (v15.2.2)
4. See next-server (v15.2.2) process idles from 15% to 20% cpu usage
Current vs. Expected behavior
next-server (v14.2.8) process idles from 0% to 3% cpu usage
Provide environment information
Operating System: Platform: darwin Arch: arm64 Version: Darwin Kernel Version 24.3.0: Thu Jan 2 20:24:06 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T8103 Available memory (MB): 16384 Available CPU cores: 8 Binaries: Node: 22.14.0 npm: 10.9.2 Yarn: 1.22.19 pnpm: 9.14.1 Relevant Packages: next: 15.2.2 // Latest available version is detected (15.2.2). eslint-config-next: 15.2.2 react: 19.0.0 react-dom: 19.0.0 typescript: 5.8.2 Next.js Config: output: N/AWhich area(s) are affected? (Select all that apply)
Performance
Which stage(s) are affected? (Select all that apply)
next dev (local)
Additional context
No response