# Optimize

> Optimize Highcharts code for runtime performance and file-size impact while preserving behavior and API compatibility.

- Skill: `highcharts/optimize` (Agent Skill)
- Install (CLI): `npx skillmds@latest add highcharts/optimize`
- Raw SKILL.md: https://api.skillmd.com/api/skills/highcharts/optimize/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: highcharts (https://skillmd.com/u/highcharts)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/highcharts/optimize

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# Highcharts Optimize

Use this skill when code is slow, memory-heavy, or larger than necessary.

## Steps

1. Profile and locate hot paths.
2. Apply minimal fixes with unchanged behavior/API.
3. Add or update regression tests.
4. Validate with relevant tests.

## Focus areas

- Merge redundant iterations; avoid O(n^2) loops on data points.
- Reduce redraw/reflow triggers and repeated expensive calculations.
- Reuse SVG/DOM elements when possible; avoid repeated `attr()` churn.
- Cache hot-loop option lookups and computed values.
- Remove dead code and unnecessary imports to reduce size.
- Ensure cleanup in destroy paths to avoid leaks.
- Reuse pre-existing utility functions and patterns whenever possible.

## Output format

For each optimization:

- What changed
- Where: `path:line`
- Impact
- Trade-off