next/og cause memory leak in production standalone build

[Innei]

Link to the code that reproduces this issue

https://github.com/Innei/next-og-oom-repro

To Reproduce

1. build project
2. run as standalone build node server.js
3. open /og
4. open devtools and force refresh the page(ignore cache) more times.
5. watch the system monitor, and the next app memory usage is increasing.

The initial memory usage about to 50M, and refresh /og about 10 times, got 300M

I can provide some ways to try to troubleshoot memory issues.

Add memory dump code in .next/standalone/server.js

process.title = 'next-og-oom'

const v8 = require('v8')
const fs = require('fs')

function createHeapSnapshot() {
  const snapshotStream = v8.getHeapSnapshot()
  const timestamp = new Date().toISOString().replace(/[:\.]/g, '-')
  const fileName = `/tmp/${timestamp}.heapsnapshot`
  const fileStream = fs.createWriteStream(fileName)
  snapshotStream.pipe(fileStream).on('finish', () => {
    console.log('Heap snapshot saved to', fileName)
  })
}

process.on('SIGUSR2', () => {
  console.log('SIGUSR2 received, creating heap snapshot...')
  createHeapSnapshot()
})

And then refresh the page and refresh the page several times and observe the app memory usage afterwards. When memory overflows and is not freed, hit the heap of memory at that point with kill -SIGUSR2 <pid>.

As you can see from the following dump, it's the ImageResponse-related modules that are leaking memory. ImageResponse and FigmaImageResponse that means @vercel/og causes memory leak?

Link to #44685 (comment).

Current vs. Expected behavior

1. Memory does not free up and increases more and more, finally oom.

expected:

Memory can be freed up.

Provide environment information

Operating System:
  Platform: darwin/linux
  Arch: arm64/amd64
  Version: Darwin Kernel Version 23.4.0: Fri Mar 15 00:12:49 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T6020/ or Linux
  Available memory (MB): 32768
  Available CPU cores: 12
Binaries:
  Node: 18.18.0/20.x
  npm: 10.2.4
  Yarn: 1.22.21
  pnpm: 9.1.0
Relevant Packages:
  next: 14.2.3 // Latest available version is detected (14.2.3).
  eslint-config-next: N/A
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.4.5
Next.js Config:
  output: standalone

Which area(s) are affected? (Select all that apply)

Image (next/image)

Which stage(s) are affected? (Select all that apply)

Other (Deployed)

Additional context

No response

[Innei]

Attachment: 2024-05-07T12-30-03-488Z.heapsnapshot.zip