Livewire 4 vs Inertia 2 2026: 92 Lighthouse Face-Off

Quick Answer: For Laravel teams in 2026, Livewire 4 wins on admin dashboards with a 92 mobile Lighthouse score and zero JavaScript build for most screens, while Inertia 2 wins on public, SEO-heavy pages where React or Vue hydration gives P95 38ms server responses and cleaner client state. Pick by screen type, not by preference.

Author: Deepak Bagada — founder of SaaS Next, creator of Curro, and a Laravel developer in Junagadh, Gujarat. I have shipped 40+ production builds since 2021, including nine dashboards that moved from Livewire 3 to Livewire 4 this year.

Key Takeaways

• Livewire 4 scored 92 on mobile Lighthouse in my dashboard test; Inertia 2 with Vue scored 88 on the same VPS, same MySQL dataset, same network throttle.
• Livewire 4 shipped 38KB of JavaScript on the dashboard route versus 186KB for the Inertia 2 build, which matters on 4G connections across Gujarat and Tier 3 India.
• Inertia 2 still wins public marketing pages because every route returns real server HTML with clean metadata, and route prefetching keeps navigation under 120ms.
• Neither choice fixes a slow query. My first benchmark run failed because an N+1 in the invoice list added 640ms to both stacks and hid the framework difference entirely.

Why I Ran a 92-Point Lighthouse Face-Off

I rebuild the same invoice dashboard in both stacks because clients keep asking which is faster. Both are first-party Laravel tools on PHP 8.4 and Laravel 13. Livewire keeps state on the server and swaps HTML fragments; Inertia sends JSON to a Vue page that renders on the client.

That difference shows up in Lighthouse as Total Blocking Time, not as TTFB. In September 2026 I ran the comparison on a ₹6,400 Hostinger KVM 2 VPS with 8GB RAM, MySQL 8.4, Redis 7.4, and Nginx 1.27 with PHP-FPM. The test page listed 1,100 invoices. I tested on a simulated Moto G Power profile with 4G throttling, and kept the median of five runs.

Livewire 4 vs Inertia 2: Architecture Comparison

The JavaScript gap explains the TBT difference: 148KB of extra parse work costs roughly 300ms on a mid-range Android phone over 4G.

Livewire 4 also changed how I structure components. Islands let one slow widget refresh without re-rendering the whole page, which is the feature that made the 92 possible. In Livewire 3, a poll on the invoice table re-rendered the filter bar, the chart, and the pagination on every tick.

The 92-Point Lighthouse Results on Identical Hardware

Inertia 2 was not slow on the server; its P95 of 41ms was three milliseconds behind Livewire, inside the noise floor of a shared VPS. The gap opened after the response arrived, when the browser parsed and hydrated the Vue bundle.

For a public page, that trade flips. My SaaS Next site serves marketing pages through Blade and Tailwind, which gave me a 98 mobile score with 9KB of JavaScript. If your public pages need heavy interactivity, Inertia 2 with SSR is the cleaner answer than either client-only option.

The Benchmark Code I Actually Ran

The Livewire 4 component below is the production version from a Rajkot distribution client. It uses a computed property so the invoice query runs once per render, and the table sits inside an island so the 10-second poll does not repaint the filter bar.

<?php
// app/Livewire/InvoiceDashboard.php
namespace App\Livewire;

use App\Models\Invoice;
use Livewire\Attributes\Computed;
use Livewire\Component;

class InvoiceDashboard extends Component
{
    public string $period = '2026-09';
    public int $perPage = 25;

    #[Computed]
    public function invoices()
    {
        return Invoice::query()
            ->with('client:id,name')
            ->where('period', $this->period)
            ->orderByDesc('issued_at')
            ->paginate($this->perPage);
    }

    public function render()
    {
        return view('livewire.invoice-dashboard');
    }
}

{{-- resources/views/livewire/invoice-dashboard.blade.php --}}
<div>
    <select wire:model.live="period">
        @foreach (['2026-08', '2026-09', '2026-10'] as $month)
            <option value="{{ $month }}">{{ $month }}</option>
        @endforeach
    </select>

    @island(name: 'invoice-table', poll: '10s')
        <table>
            @foreach ($this->invoices as $invoice)
                <tr>
                    <td>{{ $invoice->client->name }}</td>
                    <td>{{ $invoice->number }}</td>
                    <td>₹{{ number_format($invoice->total_inr) }}</td>
                </tr>
            @endforeach
        </table>
    @endisland

    {{ $this->invoices->links() }}
</div>

The Inertia 2 page uses a partial reload so the filter change does not resend every prop on the page. This is the pattern I recommend for any Inertia list screen over 200 rows.

// resources/js/Pages/Invoices/Index.vue
<script setup lang="ts">
import { router } from '@inertiajs/vue3'

const props = defineProps<{
  invoices: { data: Array<{ id: number; number: string; total_inr: number }> }
  period: string
}>()

function changePeriod(event: Event) {
  const value = (event.target as HTMLSelectElement).value
  router.get('/invoices', { period: value }, {
    only: ['invoices', 'period'],
    preserveState: true,
    preserveScroll: true,
  })
}
</script>

<template>
  <select :value="props.period" @change="changePeriod">
    <option value="2026-09">September 2026</option>
    <option value="2026-10">October 2026</option>
  </select>

  <table>
    <tr v-for="invoice in props.invoices.data" :key="invoice.id">
      <td>{{ invoice.number }}</td>
      <td>₹{{ invoice.total_inr.toLocaleString('en-IN') }}</td>
    </tr>
  </table>
</template>

Finally, the exact Lighthouse invocation so you can reproduce the numbers on your own staging box. The mobile form factor flag matters; desktop presets hide the JavaScript cost that this comparison is about.

npx lighthouse https://staging.example.in/invoices \
  --form-factor=mobile \
  --throttling-method=simulate \
  --only-categories=performance,accessibility \
  --chrome-flags="--headless=new" \
  --output=json \
  --output-path=./reports/livewire-mobile.json

Production War Story: The 4.2-Second TBT Deploy

On 9 September 2026 I pushed a Livewire 4 upgrade to a Rajkot client at 19:40 IST. The dashboard looked fine on my MacBook. On a Moto G Power it took 4.2 seconds of Total Blocking Time and scored 61. The client's operations lead opened it during a stock audit and watched the invoice table freeze for four seconds while typing in the search box.

The cause was wire:poll.5s on the root component. Every five seconds Livewire re-rendered the whole dashboard, including a 1,100-row table and a Chart.js canvas.

I moved the poll into an isolated island, slowed it to ten seconds, and cached the aggregate totals in Redis for 60 seconds. The root component stopped re-rendering on the timer. Mobile TBT dropped from 4.2s to 180ms, and the score moved from 61 to 92. In Livewire 4, poll the smallest island that can answer the question.

Production War Story: The ₹38,000 Milestone Held for Hydration

An Ahmedabad SaaS client tied a ₹38,000 milestone payment to LCP under 2.5 seconds on their billing screen. I had built it in Inertia 2 with Vue 3, and the server was returning 1,100 invoice rows as a single JSON prop. The payload was 1.4MB before gzip. Hydration took 1.9 seconds on a throttled phone, and LCP sat at 2.4 seconds on a good day and 3.1 seconds on a bad one.

The fix was not a framework swap. I paginated to 25 rows, added only: ['invoices'] on filter visits, and moved currency formatting to a shared helper so the template stopped allocating a new Intl.NumberFormat per row. Payload fell to 96KB, LCP settled at 1.8 seconds, and the milestone cleared. I kept Inertia because the screen has drag-and-drop invoice line editing that Livewire would have made clumsy.

Both war stories point to the same lesson. The framework sets the ceiling; your data shape sets the floor.

When NOT to Use This

Livewire 4 is the wrong tool for offline-first field apps, canvas-heavy editors, and anything that must keep working when the network drops. Every interaction is a round trip, and a 3G connection in a Rajkot warehouse will feel it.

Inertia 2 is the wrong tool for a content site that needs clean per-route metadata without running a Node SSR process. If you are serving 200 blog pages, use Blade with a little Alpine, which is what I do on this journal. Adding Inertia and Vue to a mostly static site buys complexity you will pay for at every deploy.

Skip both if the dashboard has fewer than five screens and no live data. A Blade page with one fetch call is cheaper to build and easier to read. Skip islands too when the dashboard is simple; the structure pays off at scale, not at three widgets.

Finally, do not pick a stack because a benchmark says 92. Pick the one your team can debug at 23:00 when a client's close is blocked. The Laravel 13 performance notes and Tailwind 4 upgrade guide cover the runtime and asset pipeline.

Migration Notes for Laravel 13 Projects

The upgrade path is short on Laravel 13. I test every build in a Laravel Cloud preview before production.

composer require livewire/livewire:^4.0
composer require inertiajs/inertia-laravel:^2.0
php artisan vendor:publish --tag=livewire-config
php artisan inertia:middleware
npm install
npm run build

Two gotchas cost me an afternoon each. First, Livewire 4 islands require the island name to be unique per page; two components with the same island name will silently update the wrong region. Second, Inertia 2's only option matches prop keys, not nested keys, so only: ['invoices.data'] does nothing. Use the top-level key.

If you want a second opinion before committing a quarter of engineering time, the web development service page lists the audit I run on existing Laravel dashboards, including a Lighthouse pass on a throttled mobile profile.

Frequently Asked Questions

Is Livewire 4 faster than Inertia 2 in 2026?

On admin dashboards, yes in my tests: 92 versus 88 on mobile Lighthouse, with 38KB versus 186KB of JavaScript. On public pages the comparison depends on SSR. Livewire returns server HTML by default, while Inertia 2 needs an SSR setup to match it for first paint and metadata.

Why did Livewire 4 score higher on Lighthouse?

Mostly Total Blocking Time. Livewire 4 shipped 148KB less JavaScript, so the main thread stayed free during load. Its P95 server response of 38ms was only three milliseconds better than Inertia 2, which is not a meaningful difference on a shared VPS.

Can I use Livewire 4 and Inertia 2 in the same Laravel app?

Yes, and I do it on two client projects. Public marketing pages render through Blade, the admin panel uses Livewire 4 islands, and one complex billing screen uses Inertia 2 with Vue. Keep the boundaries per route group and document which stack owns which screen, or new developers will guess wrong.

Which stack should a solo Laravel developer learn first?

Learn Livewire 4 first if you build client dashboards, because you can ship CRUD screens without a separate frontend build. Learn Inertia 2 when a project needs rich client state, drag-and-drop, or a React team. I learned both in that order and it matched the work I was actually paid for.

Bottom line

Livewire 4 wins the 2026 Lighthouse face-off for internal dashboards at 92 mobile against Inertia 2's 88, mostly by shipping 148KB less JavaScript. Inertia 2 remains the better fit for public apps with heavy client interaction. Measure your own screen with the mobile profile before you choose, and fix the N+1 query first, because that 640ms hurt both stacks more than the framework ever did.