feat: enable lazy compilation for imports by defaults

[stormslowly]

Summary

Enable LazyCompilation for dynamic imports by default.

know issue

Currently lazyCompilation with entries: true not working properly with module federation. So disable entries sub feature by default.

An anther case dynamic removed entry is also traced in issue.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack canceled.

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🔨 Latest commit	35f689f
🔍 Latest deploy log	https://app.netlify.com/projects/rspack/deploys/6940d48e6602b40008a9760f

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 project(s) in monorepo.

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

📌 Baseline Commit: a713d9fdb0 | PR: #12457

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	5.7 MB	0 B (0.0%)
📄 JavaScript	5.7 MB	5.7 MB	0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0 B (0.0%)
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-10k Bundle Diff

📁 react-1k

Path: ../build-tools-performance/cases/react-1k/dist/rsdoctor-data.json

📌 Baseline Commit: a713d9fdb0 | PR: #12457

Metric	Current	Baseline	Change
📊 Total Size	823.6 KB	823.6 KB	0 B (0.0%)
📄 JavaScript	823.6 KB	823.6 KB	0 B (0.0%)
🎨 CSS	0 B	0 B	N/A
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-1k Bundle Diff

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

📌 Baseline Commit: a713d9fdb0 | PR: #12457

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	2.7 MB	0 B (0.0%)
📄 JavaScript	2.7 MB	2.7 MB	0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0 B (0.0%)
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: react-5k Bundle Diff

📁 rome

Path: ../build-tools-performance/cases/rome/dist/rsdoctor-data.json

📌 Baseline Commit: a713d9fdb0 | PR: #12457

Metric	Current	Baseline	Change
📊 Total Size	984.3 KB	984.3 KB	0 B (0.0%)
📄 JavaScript	984.3 KB	984.3 KB	0 B (0.0%)
🎨 CSS	0 B	0 B	N/A
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: rome Bundle Diff

📁 ui-components

Path: ../build-tools-performance/cases/ui-components/dist/rsdoctor-data.json

📌 Baseline Commit: a713d9fdb0 | PR: #12457

Metric	Current	Baseline	Change
📊 Total Size	2.1 MB	2.1 MB	0 B (0.0%)
📄 JavaScript	2.0 MB	2.0 MB	0 B (0.0%)
🎨 CSS	83.0 KB	83.0 KB	0 B (0.0%)
🌐 HTML	0 B	0 B	N/A
📁 Other Assets	0 B	0 B	N/A

📦 Download Diff Report: ui-components Bundle Diff

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 35f689f to refactor: remove unused code and methods (#12451) by harpsealjs

🙈 Size remains the same at 48.19MB

[codspeed-hq]

CodSpeed Performance Report

Merging #12419 will not alter performance

_{Comparing chore/default_lazy_compilation (35f689f) with main (a713d9f)}

Summary

✅ 17 untouched

[Copilot]

Pull request overview

This PR enables lazy compilation by default in Rspack with the configuration { entries: false }, addressing known issues with entry-level lazy compilation in module federation and dynamic entry scenarios. The change includes updates to test configurations to explicitly disable lazy compilation where needed, and refactors test assertions to use Playwright's built-in matchers.

Key Changes

• Changed default lazyCompilation from false to { entries: false } in the configuration defaults
• Updated multiple test configurations to explicitly disable lazy compilation where it conflicts with test objectives
• Refactored E2E test assertions to use Playwright's toHaveText() and toHaveClass() matchers instead of manual DOM evaluation
• Reduced E2E test timeout from 2 minutes to 1 minute

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
packages/rspack/src/config/defaults.ts	Changed lazyCompilation default from false to { entries: false } to enable lazy compilation with entries disabled
tests/rspack-test/defaultsCases/default/base.js	Updated expected default configuration to match new lazyCompilation default
tests/rspack-test/multiCompilerCases/lazy-compilation.js	Added explicit lazyCompilation: false to first compiler config to maintain test isolation
tests/e2e/playwright.config.ts	Reduced TIMEOUT from 2 minutes to 1 minute
tests/e2e/cases/react/tailwindcss/index.test.ts	Refactored test assertions from manual getComputedStyle to Playwright's toHaveClass matcher
tests/e2e/cases/react/tailwindcss-with-css-extract/index.test.ts	Refactored test assertions from manual getComputedStyle to Playwright's toHaveClass matcher
tests/e2e/cases/make/remove-dynamic-entry/rspack.config.js	Added lazyCompilation: { entries: false } to address known issue with dynamic entry removal
tests/e2e/cases/make/remove-dynamic-entry/index.test.ts	Updated selectors from text-based to ID-based for more robust element targeting
tests/e2e/cases/make/remove-dynamic-entry-with-loader/rspack.config.js	Added lazyCompilation: false to disable lazy compilation for loader-based dynamic entry test
tests/e2e/cases/make/remove-dynamic-entry-with-loader/index.test.ts	Refactored assertions to use toHaveText and improved test structure with blank line
tests/e2e/cases/html/cross-origin-loading/rspack.config.js	Added lazyCompilation: false for concise asset assertions
tests/e2e/cases/hooks/asset-emitted/rspack.config.js	Added lazyCompilation: false to ensure deterministic asset emission for hook testing
tests/e2e/cases/hooks/asset-emitted/index.test.ts	Refactored assertion to use Playwright's toHaveText matcher
tests/e2e/cases/file/context-delete-file/index.test.ts	Refactored assertion to use Playwright's toHaveText matcher
tests/e2e/cases/css/import-empty-css-file/index.test.ts	Refactored assertion to use Playwright's toHaveText matcher
tests/e2e/cases/chunk/recover-error/index.test.ts	Updated expected chunk filename from AppIndex.js to src_AppIndex_jsx.js to match lazy compilation output naming

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