Is it normal that build time increase to 1.46m from 10s when set newTreeshaking to true?

[jayjliang]

[chenjiahan]

The image is broken.

This should be a bug, can you create an issue in the Rspack repo? https://github.com/web-infra-dev/rspack/issues

[jayjliang]

sorry, the project is private and normal project don't have this problem, is there any tools that can analyse the build time

[chenjiahan]

Sure, you can use Rsdoctor to analyze the build time: https://github.com/web-infra-dev/rsdoctor

And there is a profiling chapter in the rspack dev guide: https://web-infra-dev.github.io/rspack-dev-guide/profiling/intro.html#profiling

[jayjliang]

rsdoctor can't help me find the key problem



i guess it's releated to newTreeshaking, i try to use rspack profilling, the nodejs profiling is normal, how can i get tracing data using rsbuild? the export rspack config is useless

[9aoy]

rspack profile can also be used in rsbuild , you can use RSPACK_PROFILE=ALL rsbuild build to get more rspack build performance profiles.
If this still doesn't help you locate the problem, maybe you can try to provide a minimal reproducible demo.

https://www.rspack.dev/guide/profile.html

[jayjliang]

the longest slice is `plugin:finish_modules` as above

[jayjliang]

logging.json
logging.json has been attached, tracing json (93MB) is too big to upload

[jayjliang]

what's more, i really want to provide a minimal reproducible demo, but this project has thousands of private dependencies
if i turn off newTreeshaking, there will be circular dependency problem

[jayjliang]

finally，#5123 seems the same problem

[chenjiahan]

It is recommended to only enable new tree shaking in production build at this stage, see #1839

[jayjliang]

if i turn off newTreeshaking, there will be circular dependency problem