Slow startup time due to iterating all files in ignored directory

[mozeryansky]

I find that the startup time of my app is a little slow. While running DEBUG="*" npm run dev I noticed that a majority of the time it was skipping ignored files:

...
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/@shopify/koa-shopify-auth/dist/src/auth/client/storage-access-helper.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +1ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/@shopify/koa-shopify-auth/dist/src/verify-request/index.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +1ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/@shopify/koa-shopify-auth/dist/src/verify-request/verify-request.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +0ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/koa-compose/index.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +15ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/any-promise/index.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +1ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/any-promise/register.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +0ms
babel:config:config-chain No config is applied to "/Users/michael/repos/MyApp/node_modules/any-promise/loader.js" because it matches one of `ignore: ["node_modules"]` from "/Users/michael/repos/MyApp" +1ms
...

I noticed that the ignore code ignores file by file matching. Can it instead ignore the folder without iterating every file in the directory?

Relative file:

babel/packages/babel-core/src/config/config-chain.js

Line 780 in cb30c1d

const message = `No config is applied to "${

require('@babel/register')({
  presets: ['@babel/preset-env'],
  ignore: ['node_modules']
});

  System:
    OS: macOS 11.0.1
  Binaries:
    Node: 12.18.3 - /usr/local/bin/node
    npm: 6.14.8 - /usr/local/bin/npm
  npmPackages:
    @babel/core: ^7.12.7 => 7.12.7 
    @babel/plugin-transform-runtime: ^7.12.1 => 7.12.1 
    @babel/polyfill: ^7.12.1 => 7.12.1 
    @babel/preset-env: ^7.12.7 => 7.12.7 
    @babel/preset-stage-3: ^7.8.3 => 7.8.3 
    @babel/register: ^7.12.1 => 7.12.1 

• Babel version(s): 7.12.7
• Node/npm version: Node v12.18.3, npm 6.14.8
• OS: macOS 11.0.1
• How you are using Babel: register

[babel-bot]

Hey @mozeryansky! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite."

[mozeryansky]

Also I see this parameter in the compilerHook could be set to ignore node_module:

babel/packages/babel-register/src/node.js

Line 99 in eea156b

piratesRevert = addHook(compileHook, { exts, ignoreNodeModules: false });

ignoreNodeModules: true gives me a slight speedup

[JLHwung]

Duplicate of #9383