⚡ Optimize MatrixInput state updates by Inmerson · Pull Request #6 · Inmersion-Biotech/Math-Biotech-Project

Inmerson · 2026-02-04T08:59:07Z

What: Refactored MatrixInput to use local state for typing and only propagate changes to parent on blur or Enter key.
Why: Typing in the matrix input caused excessive re-renders of the parent component and the entire matrix grid for every keystroke.
Measured Improvement: Reduced onChange calls from 1 per keystroke (N calls) to 1 per edit session (1 call). Verified with a new benchmark test components/MatrixInput.test.tsx.
Testing: Added vitest infrastructure and a specific regression test. Verified locally.

PR created automatically by Jules for task 12538811527753509655 started by @Inmerson

- Refactored MatrixInput to use local state for user input. - Defer parent state updates to onBlur and onKeyDown (Enter). - Added `vitest`, `jsdom`, `@testing-library/react` for testing. - Added `components/MatrixInput.test.tsx` to verify performance optimization. Co-authored-by: Inmerson <216765991+Inmerson@users.noreply.github.com>

google-labs-jules · 2026-02-04T08:59:08Z

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chatgpt-codex-connector · 2026-02-04T08:59:13Z

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Pull request overview

Refactors MatrixInput to reduce parent re-renders by buffering edits locally and only committing changes on blur / Enter, and introduces a Vitest-based test setup plus a regression test to validate the reduced onChange call frequency.

Changes:

Refactor MatrixInput to keep per-cell typing in local state and commit to onChange only on blur (and Enter via blur).
Add Vitest + Testing Library dependencies and a basic Vitest config for JSDOM tests.
Add a new MatrixInput test suite intended to prevent regressions in onChange call count behavior.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
`components/MatrixInput.tsx`	Buffers edits locally and commits changes on blur/Enter instead of per keystroke.
`components/MatrixInput.test.tsx`	Adds tests around `onChange` call frequency and Enter/blur commit behavior.
`vitest.config.ts`	Adds a minimal Vitest configuration (JSDOM + globals).
`package.json`	Adds test script and testing-related devDependencies.
`package-lock.json`	Updates lockfile for the newly added devDependencies.

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Copilot · 2026-02-04T09:06:17Z

+vi.mock('framer-motion', () => ({
+  motion: {
+    div: ({ children, ...props }: any) => <div {...props}>{children}</div>,
+    h3: ({ children, ...props }: any) => <h3 {...props}>{children}</h3>,
+    path: ({ children, ...props }: any) => <path {...props}>{children}</path>,
+  },
+  AnimatePresence: ({ children }: any) => <>{children}</>,
+  LayoutGroup: ({ children }: any) => <>{children}</>,
+}));
+


The framer-motion mock spreads all motion props onto real DOM/SVG elements. This can generate noisy React warnings (e.g., non-standard attributes like layout, initial, animate, transition getting attached to <div>/<path>) and may break under stricter React DOM prop validation. Prefer a mock component that only forwards safe props (e.g., children, className, style, on*) and drops motion-specific props.

Suggested change

vi.mock('framer-motion', () => ({

motion: {

div: ({ children, ...props }: any) => <div {...props}>{children}</div>,

h3: ({ children, ...props }: any) => <h3 {...props}>{children}</h3>,

path: ({ children, ...props }: any) => <path {...props}>{children}</path>,

},

AnimatePresence: ({ children }: any) => <>{children}</>,

LayoutGroup: ({ children }: any) => <>{children}</>,

}));

vi.mock('framer-motion', () => {

const filterProps = (props: any) => {

const safeProps: any = {};

Object.keys(props).forEach((key) => {

if (

key === 'className' ||

key === 'style' ||

key === 'id' ||

key === 'title' ||

key === 'role' ||

key === 'tabIndex' ||

key.startsWith('data-') ||

key.startsWith('aria-') ||

/^on[A-Z]/.test(key)

) {

safeProps[key] = props[key];

}

});

return safeProps;

};

return {

motion: {

div: ({ children, ...props }: any) => (

<div {...filterProps(props)}>{children}</div>

),

h3: ({ children, ...props }: any) => (

<h3 {...filterProps(props)}>{children}</h3>

),

path: ({ children, ...props }: any) => (

// SVG path elements typically don't have children, but we preserve the signature

<path {...filterProps(props)}>{children}</path>

),

},

AnimatePresence: ({ children }: any) => <>{children}</>,

LayoutGroup: ({ children }: any) => <>{children}</>,

};

});

Copilot · 2026-02-04T09:06:17Z

+    // Press Enter
+    fireEvent.keyDown(input, { key: 'Enter', code: 'Enter', charCode: 13 });
+
+    // In JSDOM/Testing Library, e.currentTarget.blur() might not synchronously trigger the React onBlur event
+    // so we might need to simulate the blur event explicitly if the component relies on the browser's behavior.
+    // However, let's try to just fire blur manually to simulate the browser behavior that we know happens.
+    // This confirms that IF blur happens (which we trigger on Enter), THEN logic runs.
+    fireEvent.blur(input);
+


The “commits change on Enter key” test doesn’t actually validate the Enter behavior: the explicit fireEvent.blur(input) will commit even if the onKeyDown handler is removed or broken. To make this test meaningful, assert that pressing Enter triggers input.blur() (spy on blur) and/or that focus changes after Enter, then separately fire blur only if needed to simulate the browser event dispatch.

Copilot · 2026-02-04T09:06:18Z

+export default defineConfig({
+  test: {
+    environment: 'jsdom',
+    globals: true,


Vitest is configured with globals: true, but there’s no setupFiles configured. If you intend to use @testing-library/jest-dom matchers (added in devDependencies), add a setup file here to import the jest-dom Vitest adapter; otherwise consider removing @testing-library/jest-dom to avoid unused deps.

Suggested change

globals: true,

globals: true,

setupFiles: ['@testing-library/jest-dom/vitest'],

Copilot · 2026-02-04T09:06:18Z

+  const commitEdit = () => {
+    if (!editValue || !onChange) {
+        setEditValue(null);
+        return;
+    }

-  const handleChange = (r: number, c: number, val: string) => {
-    setEditValue({ key: `${r}-${c}`, val });
+    const [r, c] = editValue.key.split('-').map(Number);
+    const val = editValue.val;

-    if (!onChange) return;
-
-    // Allow typing "-", ".", etc. without reverting immediately
+    let newValue = data[r][c];


commitEdit reconstructs the edited coordinates by parsing editValue.key (split + Number). This adds avoidable string parsing and makes the commit path more error-prone (e.g., malformed key => NaN indices => runtime error when indexing data[r][c]). Consider storing { r: number; c: number; val: string } in state instead of { key: string; val: string }, so you can commit without parsing and keep the indices type-safe.

Copilot · 2026-02-04T09:06:18Z

    "@types/node": "^22.14.0",
    "@vitejs/plugin-react": "^5.1.3",
+    "jsdom": "^28.0.0",
    "typescript": "~5.8.2",
-    "vite": "^6.4.1"
+    "vite": "^6.4.1",
+    "vitest": "^4.0.18"


New devDependencies (vitest and jsdom) in the lockfile declare Node engine requirements of >=20, but the repo’s GitHub Pages workflow pins Node 18. This will prevent running npm test (and may break installs in environments enforcing engines). Either bump the project/CI Node version to >=20 or pin Vitest/JSDOM versions that support Node 18 and document the supported Node range (e.g., via package.json engines).

Copilot · 2026-02-04T09:06:18Z

  },
  "devDependencies": {
+    "@testing-library/dom": "^10.4.1",
+    "@testing-library/jest-dom": "^6.9.1",


@testing-library/jest-dom is added but not referenced anywhere in the repo, so it’s currently unused. Either remove it to keep devDependencies lean, or add a Vitest setup file (e.g., via test.setupFiles) that imports the jest-dom Vitest entrypoint so the matchers are actually enabled.

Suggested change

"@testing-library/jest-dom": "^6.9.1",

… test script Agent-Logs-Url: https://github.com/Inmerson/Math-Biotech-Project/sessions/4bf732bb-5699-4ece-a274-b31db7c8837a Co-authored-by: Inmerson <216765991+Inmerson@users.noreply.github.com>

Copilot AI review requested due to automatic review settings February 4, 2026 08:59

Copilot started reviewing on behalf of Inmerson February 4, 2026 08:59 View session

Copilot AI reviewed Feb 4, 2026

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Inmerson mentioned this pull request Apr 27, 2026

Bolt: Review, fix and merge open PRs #6 and #7 #12

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Copilot AI mentioned this pull request Apr 27, 2026

[WIP] Review and merge open performance optimization PRs #6 and #7 #13

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⚡ Optimize MatrixInput state updates - #6

⚡ Optimize MatrixInput state updates#6
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-vi.mock('framer-motion', () => ({
-  motion: {
-    div: ({ children, ...props }: any) => <div {...props}>{children}</div>,
-    h3: ({ children, ...props }: any) => <h3 {...props}>{children}</h3>,
-    path: ({ children, ...props }: any) => <path {...props}>{children}</path>,
-  },
-  AnimatePresence: ({ children }: any) => <>{children}</>,
-  LayoutGroup: ({ children }: any) => <>{children}</>,
-}));
+vi.mock('framer-motion', () => {
+  const filterProps = (props: any) => {
+    const safeProps: any = {};
+    Object.keys(props).forEach((key) => {
+      if (
+        key === 'className' ||
+        key === 'style' ||
+        key === 'id' ||
+        key === 'title' ||
+        key === 'role' ||
+        key === 'tabIndex' ||
+        key.startsWith('data-') ||
+        key.startsWith('aria-') ||
+        /^on[A-Z]/.test(key)
+      ) {
+        safeProps[key] = props[key];
+      }
+    });
+    return safeProps;
+  };
+  return {
+    motion: {
+      div: ({ children, ...props }: any) => (
+        <div {...filterProps(props)}>{children}</div>
+      ),
+      h3: ({ children, ...props }: any) => (
+        <h3 {...filterProps(props)}>{children}</h3>
+      ),
+      path: ({ children, ...props }: any) => (
+        // SVG path elements typically don't have children, but we preserve the signature
+        <path {...filterProps(props)}>{children}</path>
+      ),
+    },
+    AnimatePresence: ({ children }: any) => <>{children}</>,
+    LayoutGroup: ({ children }: any) => <>{children}</>,
+  };
+});

	globals: true,
	globals: true,
	setupFiles: ['@testing-library/jest-dom/vitest'],

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