Christian Byrne 79d0e6dc69 fix: cache ctx.measureText results to avoid redundant calls in draw loop (#9404) ...

## What
Add a per-frame text measurement cache for all hot-path
ctx.measureText() calls.

## Why
drawTruncatingText() in BaseWidget calls ctx.measureText() per widget
per frame with zero caching. For a 50-node workflow at 60fps:
~78,000-243,000 measureText calls/sec. Text labels rarely change between
frames.

## How
Global Map<string, number> cache keyed by font+text, cleared once per
frame at the start of drawFrontCanvas(). Replaces direct
ctx.measureText() calls in BaseWidget.drawTruncatingText, draw.ts
truncateTextToWidth/drawTextInArea, LGraphBadge.getWidth,
LGraphButton.getWidth, and textUtils.truncateText.

## Perf Impact
Expected: ~95% reduction in measureText calls (only cache misses on
first frame and value changes). Firefox has slower measureText than
Chrome, so this disproportionately benefits Firefox.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9404-fix-cache-ctx-measureText-results-to-avoid-redundant-calls-in-draw-loop-31a6d73d3650814e9cdac16949c55cb7)
by [Unito](https://www.unito.io)

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Co-authored-by: GitHub Action <action@github.com>

2026-03-13 08:16:53 -07:00

..

commands

docs: Weekly Documentation Update (#7849)

2026-02-02 01:30:34 -08:00

skills

fix: cache ctx.measureText results to avoid redundant calls in draw loop (#9404)

2026-03-13 08:16:53 -07:00

settings.json

feat: extract SeedControlButton component (#9744)

2026-03-13 02:49:18 -07:00