feat(optimizer): isolate event-only QRL chunks in smart mode by Varixo · Pull Request #9309 · QwikDev/qwik

Varixo · 2026-10-26T21:28:20Z

Summary by CodeRabbit

New Features
- Smart loading now keeps code used only by event handlers separate from code needed to render a page. This can reduce the amount of event-related code included in render-loaded chunks, while preserving callbacks that are also used during rendering or elsewhere.
- The behavior applies to common event-handler patterns, including aliases and callbacks passed through component props.

changeset-bot · 2026-10-26T21:28:25Z

🦋 Changeset detected

Latest commit: 0452ebe

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 8 packages

Name	Type
@qwik.dev/core	Patch
@qwik.dev/devtools	Patch
eslint-plugin-qwik	Patch
@qwik.dev/mcp	Patch
@qwik.dev/react	Patch
@qwik.dev/router	Patch
@qwik.dev/utils	Patch
create-qwik	Patch

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coderabbitai · 2026-10-26T21:28:30Z

Walkthrough

The TypeScript and Rust optimizers identify QRLs used only as event values. Under the smart entry strategy, those QRLs receive segment-derived entries. New optimizer and Vite tests check entry assignment and generated chunk contents.

Changes: Event-only QRL optimization

Layer / File(s)	Summary
Event-use analysis `packages/ts-optimizer/src/optimizer/analysis/event-qrls.ts`, `packages/optimizer/core/src/transform_event_qrls.rs`	Collectors recognize event values in JSX and helper calls, track aliases, and exclude QRLs with non-event uses.
Smart-entry classification and assignment `packages/ts-optimizer/src/optimizer/extraction/extract.ts`, `packages/ts-optimizer/src/optimizer/segment/entry-strategy.ts`, `packages/ts-optimizer/src/optimizer/transform/index.ts`, `packages/optimizer/core/src/transform.rs`, `.changeset/smart-event-qrl-references.md`	The TypeScript transform marks qualifying extractions, while the Rust transform records qualifying QRL positions. Smart entry assignment uses a segment-derived entry for classified QRLs. The changeset records a patch release.
Entry and chunk validation `packages/optimizer/core/src/fixtures/smart-event-qrl-.tsx`, `packages/optimizer/core/src/test.rs`, `packages/ts-optimizer/tests/optimizer/segment/`, `packages/ts-optimizer/tests/hashing/naming.test.ts`, `packages/ts-optimizer/tests/optimizer/snapshot-options.ts`, `packages/qwik-vite/src/plugins/event-qrls.unit.ts`	Tests cover event and render consumers, aliases, entry strategies, library output, and generated chunks. Snapshot naming tests now use transform options and scope.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant TSOptimizer as transformModule
  participant TSCollector as collectEventOnlyQrls
  participant TSStrategy as EntrySegment strategy
  participant RustTransform as QwikTransform
  participant RustCollector as collect_event_only_qrls
  participant RustSegment as create_segment
  TSOptimizer->>TSCollector: Collect event-only extraction positions
  TSCollector-->>TSOptimizer: Return candidate positions
  TSOptimizer->>TSStrategy: Mark matching extractions as isEventOnly
  TSStrategy-->>TSOptimizer: Assign segment_hash entry
  RustTransform->>RustCollector: Collect event-only QRL positions
  RustCollector-->>RustTransform: Return candidate positions
  RustTransform->>RustSegment: Create segment for matching QRL position
  RustSegment-->>RustTransform: Assign segment_hash entry

Possibly related PRs

QwikDev/qwik#9263: Both PRs change smart-mode entry assignment for event-handler QRL segments.

Suggested reviewers: maiieul, wmertens

Merge Risk: Low · up to 0452e

Untranspiled JSX can incur an extra load when rendering a QRL used as a component tag. Correct the Rust collector before merging, or accept this bounded performance risk.

Security architecture risk: Low · up to 0452e

The change affects how client code is grouped and loaded, rather than who may invoke it. No new privilege or data-exposure path was established. Risk remains low rather than minimal because alternate compilation modes and deployed behavior are not fully covered.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

inferred — The demonstrated scope is the generated chunk graph of applications using smart entry strategy. The classification can affect many consuming applications, but the inspected path does not introduce tenant selection, service authority, or a new remote-input entrypoint.

Trust Boundaries and Controls

observed — Classification consumes build-time AST nodes, imports, bindings, and existing extraction records. Its output is source positions used for entry grouping. In Rust, the segment import path continues to derive from the canonical filename independently of the new entry assignment. Event-only separation is therefore a loading boundary, not an authorization control.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 15.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: isolating event-only QRL chunks when using smart mode.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 15.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 20 functions across 14 files. (1 skipped: 1 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Finishing Touches: 💡 1

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pkg-pr-new · 2026-10-26T21:37:29Z

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@qwik.dev/core

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/core@9309

@qwik.dev/router

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/router@9309

@qwik.dev/utils

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/utils@9309

eslint-plugin-qwik

npm i https://pkg.pr.new/QwikDev/qwik/eslint-plugin-qwik@9309

create-qwik

npm i https://pkg.pr.new/QwikDev/qwik/create-qwik@9309

@qwik.dev/optimizer

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/optimizer@9309

@qwik.dev/devtools

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/devtools@9309

@qwik.dev/mcp

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/mcp@9309

commit: 0452ebe

github-actions · 2026-10-26T21:44:37Z

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Name	Status	Preview	Last Commit
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Actionable comments posted: 1

🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @packages/optimizer/core/src/transform_event_qrls.rs:
- Around line 169-176: Add a JSX element-name visitor alongside
visit_jsx_element that records component identifiers and the root identifier of
JSX member expressions as blocked references, while skipping lowercase intrinsic
tags using the existing self.native state. Continue visiting the name’s children
afterward so existing traversal behavior is preserved.

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Commits

Reviewing files that changed from the base of the PR and between 0248245 and 0452ebe.

Files ignored due to path filters: 2

packages/optimizer/core/src/snapshots/qwik_core__test__smart_event_qrl_references.snap is excluded by !**/*.snap
packages/optimizer/core/src/snapshots/qwik_core__test__smart_event_qrl_render_consumers.snap is excluded by !**/*.snap

Files selected for processing: 15

.changeset/smart-event-qrl-references.md
packages/optimizer/core/src/fixtures/smart-event-qrl-references.tsx
packages/optimizer/core/src/fixtures/smart-event-qrl-render-consumers.tsx
packages/optimizer/core/src/test.rs
packages/optimizer/core/src/transform.rs
packages/optimizer/core/src/transform_event_qrls.rs
packages/qwik-vite/src/plugins/event-qrls.unit.ts
packages/ts-optimizer/src/optimizer/analysis/event-qrls.ts
packages/ts-optimizer/src/optimizer/extraction/extract.ts
packages/ts-optimizer/src/optimizer/segment/entry-strategy.ts
packages/ts-optimizer/src/optimizer/transform/index.ts
packages/ts-optimizer/tests/hashing/naming.test.ts
packages/ts-optimizer/tests/optimizer/segment/entry-strategy.test.ts
packages/ts-optimizer/tests/optimizer/segment/event-qrls.test.ts
packages/ts-optimizer/tests/optimizer/snapshot-options.ts

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feat(optimizer): isolate event-only QRL chunks in smart mode

0452ebe

maiieul assigned Varixo Oct 26, 2026

maiieul added this to Qwik Development Oct 26, 2026

maiieul moved this to In progress in Qwik Development Oct 26, 2026

Varixo marked this pull request as ready for review October 29, 2026 20:22

Varixo requested a review from a team as a code owner October 29, 2026 20:22

maiieul moved this from In progress to Waiting For Review in Qwik Development Oct 29, 2026

coderabbitai Bot reviewed Oct 29, 2026

View reviewed changes

Comment thread packages/optimizer/core/src/transform_event_qrls.rs Resolved

maiieul approved these changes Oct 29, 2026

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Varixo merged commit 1e572df into main Nov 3, 2026
60 checks passed

Varixo deleted the feat/smart-event-qrl-boundaries branch November 3, 2026 19:33

github-project-automation Bot moved this from Waiting For Review to Done in Qwik Development Nov 3, 2026

github-actions Bot mentioned this pull request Nov 3, 2026

V2 Version Packages (rc) #9295

Merged

maiieul mentioned this pull request Nov 6, 2026

fix(qwik-vite): readable names for split segment chunks #9386

Merged

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feat(optimizer): isolate event-only QRL chunks in smart mode - #9309

feat(optimizer): isolate event-only QRL chunks in smart mode#9309
Varixo merged 1 commit into
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