perf: swap pixelmatch for @blazediff/core

[teimurjan]

What: Swap pixelmatch for @blazediff/core in the headless golden-PNG comparison path.

Why: Identical pixel-diff results, ~1.5x faster, zero dependencies.

How: Drop-in replacement. Same call signature and threshold option, no logic changes.

Notes: @blazediff/core is already used by Vitest, Shopify, Ant Design, Vega, and ApexCharts.

🤖 Generated with Claude Code

[changeset-bot]

🦋 Changeset detected

Latest commit: 8df9dc3

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

This PR includes changesets to release 2 packages

Name	Type
@wdio/image-comparison-core	Patch
@wdio/visual-service	Patch

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• ✅ login: teimurjan / name: Teimur Gasanov (8df9dc3)

[wswebcreation]

Tnx for the PR, but why should we move to a different core now, what is the impact, will everything still work and so one

Please provide some more context for this change, this now feels like a simple with no context generated Claude PR

[teimurjan]

Tnx for the PR, but why should we move to a different core now, what is the impact, will everything still work and so one

Please provide some more context for this change, this now feels like a simple with no context generated Claude PR

Hey!

Yeah, my bad, I used Claude because considered it a routine change.

BlazeDiff is the fastest image diff group of packages right now. The core is pure JS, 100% return value match with pixelmatch. But, it uses a more performant block-based algorithm that skips redundant work. The result is ~60% performance boost (benchmarks.

It's already widely used (Vitest, Ant Group, Shopify) with 5M weekly downloads: https://www.npmjs.com/package/@blazediff/core.

TLDR: blazediff/core gives you ~60% performance boost in diffs while having 1-1 API and results match with pixelmatch (+ it has zero dependencies, so smaller chance of supply chain attack).

[wswebcreation]

Hi @teimurjan

I took some time to look into the project, do some research and it's amazing what you've built. I will run some tests on my side and will let you know if we're going to replace the core.

Just one tip, if you want people to get enthousiastic about the project, maybe provide some extra info in the initial project. Link to you posts and so on, that we also see the "why we need to change" and so on. That would make it easier for contributors to understand why (and make my reply less "rude" 😅 )