Turbopack and Tailwind hangs on large codebases #78407
Labels
linear: turbopack
Confirmed issue that is tracked by the Turbopack team.
Turbopack
Related to Turbopack with Next.js.
Comments
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Hey @hrhthegreat, thanks for the great report with reproduction, huge help!
And while looking at this found that even with it not hanging it was taking quite long to process (unexpectedly long). We've made an improvement to that here: It's still a bit slower than webpack on the amount of files Tailwind reports, we're going to investigate that further and fix it, but wanted to give you an update. |
timneutkens
added a commit
that referenced
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Apr 27, 2025
## Improve IPC socket handling in Turbopack Node.js communication ### What? Enhances the IPC communication between Turbopack and Node.js processes by implementing proper socket backpressure handling. ### Why? The current implementation doesn't properly handle backpressure when writing to sockets, which can lead to hanging where Node.js doesn't write the rest of the data. ### How? - Added a `Writable` stream wrapper around the socket to properly handle backpressure - Implemented drain event handling to ensure data is written correctly - Enabled noDelay on both the Node.js client and Rust server sides - Moved stringify into the promise to make the stringify + write happen in the same tick. Part of PACK-4409 Fixes #78407
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Link to the code that reproduces this issue
https://github.com/hamidrezahanafi/turbopack-tw-large-codebase
To Reproduce
Current vs. Expected behavior
Current: Application hangs on compiling
Expected: It should compile and show the page
Provide environment information
Operating System: Platform: darwin Arch: arm64 Version: Darwin Kernel Version 24.3.0: Thu Jan 2 20:24:22 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6041 Available memory (MB): 49152 Available CPU cores: 14 Binaries: Node: 22.14.0 npm: 10.9.2 Yarn: 4.9.1 pnpm: N/A Relevant Packages: next: 15.3.0 eslint-config-next: N/A react: 19.1.0 react-dom: 19.1.0 typescript: 5.3.3 Next.js Config: output: N/AWhich area(s) are affected? (Select all that apply)
Turbopack
Which stage(s) are affected? (Select all that apply)
next dev (local)
Additional context
This is related to tailwind/postcss plugin based on my investigation and I created this 40000 files codebase and it seems like this code on tailwind postcss plugin is registering all the files and it hangs when it pass certain number or size of files
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