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).