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perf: use blazediff for faster screenshots comparison #1983

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d84abf4
perf: use blazediff for faster screenshots comparison
teimurjan Oct 2, 2025
9509b09
fix: typing issue
teimurjan Oct 9, 2025
bcab858
chore: use latest blazediff
teimurjan Jan 13, 2026
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5 changes: 3 additions & 2 deletions indicator-examples/package-lock.json
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33 changes: 8 additions & 25 deletions package-lock.json
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3 changes: 1 addition & 2 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@
"fancy-canvas": "2.1.0"
},
"devDependencies": {
"@blazediff/core": "~1.9.0",
"@juggle/resize-observer": "3.4.0",
"@rollup/plugin-node-resolve": "16.0.1",
"@rollup/plugin-replace": "6.0.2",
Expand All @@ -65,7 +66,6 @@
"@types/express": "5.0.1",
"@types/glob": "8.1.0",
"@types/node": "22",
"@types/pixelmatch": "5.2.6",
"@types/pngjs": "6.0.5",
"@typescript-eslint/eslint-plugin": "7.18.0",
"@typescript-eslint/eslint-plugin-tslint": "7.0.2",
Expand Down Expand Up @@ -95,7 +95,6 @@
"markdownlint-cli": "0.44.0",
"memlab": "1.1.57",
"npm-run-all": "4.1.5",
"pixelmatch": "7.1.0",
"pngjs": "7.0.0",
"puppeteer": "24.6.1",
"rimraf": "6.0.1",
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5 changes: 3 additions & 2 deletions plugin-examples/package-lock.json
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4 changes: 2 additions & 2 deletions tests/e2e/graphics/README.md
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Original file line number Diff line number Diff line change
@@ -1,13 +1,13 @@
# Graphics tests

This tests uses [puppeteer](https://github.com/GoogleChrome/puppeteer) to generate screenshots and then [pixelmatch](https://github.com/mapbox/pixelmatch) to compare them.
This tests uses [puppeteer](https://github.com/GoogleChrome/puppeteer) to generate screenshots and then [blazediff](https://blazediff.dev) to compare them.

## How it works

1. If there are local files to serve - run web server.
1. Run `node:test` with loaded test cases.
1. Then, for each test case, open webpage by `puppeteer` for golden and test version, take 2 screenshots.
1. Compare given screenshots by `pixelmatch`, write them in out folder (with HTML pages).
1. Compare given screenshots by `blazediff`, write them in out folder (with HTML pages).

## Writing new test case

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4 changes: 2 additions & 2 deletions tests/e2e/graphics/helpers/compare-screenshots.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import pixelmatch from 'pixelmatch';
import blazediff from '@blazediff/core';
import { PNG } from 'pngjs';

export interface CompareResult {
Expand All @@ -20,7 +20,7 @@ export function compareScreenshots(leftImg: PNG, rightImg: PNG): CompareResult {
height: rightImg.height,
});

const diffPixelsCount = pixelmatch(
const diffPixelsCount = blazediff(
leftImg.data, rightImg.data,
diffImg.data,
leftImg.width, leftImg.height,
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