[Perf] vue2 project upgrade to [email protected]. the compilation time has increased by more than twice

[ngd-b]

When I upgrade my vue2 project with vue-cli. I used [email protected] version. the compilation time has increased by more than twice.

Before the upgrade. then compilation time was 1m20s.
After the upgrade. the compilation time was 3m30s. the time has increased by more than twice

I used node profiling to viewing the timing order. there was black time in the middle for two minutes.and I knew the execution consumption on the rust side during the black time.

I don't know how I should adjust my configuration to complie faster.

This is my node profiling file.

CPU.20250512.124052.58700.0.001.cpuprofile

thanks!

[chenjiahan]

More context here: web-infra-dev/rsbuild#5217 (reply in thread)

[jerrykingxyz]

@ngd-b Could you try open trace.json on ui.perfetto.dev and upload an image with the parts that are obviously taking long time?

[chenjiahan]

@ngd-b btw, you can use RSPACK_PROFILE= OVERVIEW instead of RSPACK_PROFILE=ALL rspack build to generate a smaller trace.json.

[ngd-b]

@chenjiahan @jerrykingxyz Ok. I might provide it a letter late.

[ngd-b]

@chenjiahan @jerrykingxyz Ok. I might provide it a letter late.

Sorry for replying so late.Is that okay? if you need more. let me know.

[hardfist]

@ngd-b can you share the trace file

[ngd-b]

@ngd-b can you share the trace file

Ok. This is the compressed file.

trace.json.zip

[hardfist]

@ngd-b it seems a performance bug of remove_available_modules, try to disable parallelCodeSplitting to workaround it

experiments:{
   parallelCodeSplitting:false
}

[hardfist]

@ngd-b can you also replace your rspack version with @rspack-canary/[email protected](wit your original config) and generate a samply profile for us to further investigate the performance problem by following this guide https://rspack.dev/contribute/development/profiling#samply

[ngd-b]

@ngd-b it seems a performance bug of remove_available_modules, try to disable parallelCodeSplitting to workaround it

experiments:{
   parallelCodeSplitting:false
}

That's good. After disabled it. the compilation time has become faster.

[hardfist]

glad it helps, since it's a performance bug, we will fix it ASAP

[ngd-b]

@ngd-b can you also replace your rspack version with @rspack-canary/[email protected](wit your original config) and generate a samply profile for us to further investigate the performance problem by following this guide https://rspack.dev/contribute/development/profiling#samply

Since I using rsbuild to build. How can I modify the version of rspack