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Slow when importing from a big ESM bundle

See original GitHub issue

🐛 Bug Report

Currently an ejected CRA is slow when we use @material-ui/icons, especially when importing from @material-ui/icons/esm instead of importing the icons separately. It takes about 120 seconds with a cold / empty cache and 5-6 seconds with a hot / filled cache.

To Reproduce

git clone git@github.com:DanielRuf/test-app.git
cd test-app
yarn
yarn test

Steps to reproduce the behavior:

run the tests

Expected behavior

The tests should run very quickly.

Link to repl or repo (highly encouraged)

envinfo

  System:
    OS: Linux 4.15 Ubuntu 18.04.2 LTS (Bionic Beaver)
    CPU: (8) x64 Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz
  Binaries:
    Node: 10.16.0 - ~/.nodenv/versions/10.16.0/bin/node
    Yarn: 1.17.3 - /usr/bin/yarn
    npm: 6.9.0 - ~/.nodenv/versions/10.16.0/bin/npm
  npmPackages:
    jest: 24.9.0 => 25.0.0

Issue Analytics

State:
Created 4 years ago
Comments:7 (2 by maintainers)

Top GitHub Comments

1reaction

DanielRufcommented, Sep 25, 2019

Hi @thymikee,

You should be able to see https://github.com/DanielRuf/test-app

git@github.com:DanielRuf/test-app.git

0reactions

github-actions[bot]commented, May 10, 2021

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs. Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.