EcoCode

Try the VS Code extension on Marketplace: EcoCode Insights

EcoCode is an open-source toolkit to measure the energy impact of your code, detect regressions, and guide more efficient optimizations.

In action

Inline optimization suggestions (squiggles + code actions), a workspace dashboard, and honest "measured vs estimated" labels.

Install

pipx install ecocode-cli

pipx installs the ecocode command on your PATH in an isolated environment (Python 3.10+). No pipx yet? sudo apt install pipx (Debian/Ubuntu) or python3 -m pip install --user pipx, then pipx ensurepath. Alternatively, install into a virtual environment: python3 -m venv .venv && .venv/bin/pip install ecocode-cli.

On Debian/Ubuntu/WSL, a plain pip install into the system Python is blocked by PEP 668 — use pipx or a venv.

A few examples:

ecocode profile path/to/script.py            # profile a single file
ecocode profile-repo --root .                # scan a whole repository
ecocode optimize suggest path/to/script.py   # optimization suggestions

Prefer a GUI? Install the VS Code extension — it drives the same CLI.

What this project is for?

EcoCode helps answer very practical questions:

• Is this script consuming more than before?
• Is a PR degrading performance and energy usage?
• Which files or code areas are the most expensive?
• Which optimizations should be prioritized first?

In practice, the CLI already lets you:

• profile a script (CPU, memory, estimated energy),
• create a baseline and compare future runs,
• scan an entire repository,
• track trends over time,
• generate optimization suggestions,
• export results for CI tooling (JSON/SARIF).

Why it is useful?

The project makes an often invisible topic visible: the runtime cost of software.

In a team workflow, this makes it easier to:

• compare changes with real numbers instead of guesswork,
• catch energy regressions before they reach production,
• add energy checks to CI the same way we already gate tests and linting,
• improve performance and reliability without losing sight of sustainability.

Where we are going?

The goal is to become a reference platform for sustainable software engineering:

• increasingly reliable, cross-platform runtime measurement,
• deeper repository analysis,
• smarter optimization recommendations,
• simpler integration into team workflows.

AI suggestions are optional

EcoCode works fully offline with deterministic, rule-based suggestions — no API key needed. AI-powered suggestions are opt-in, configured in ecocode.toml:

• Local (Ollama): a model runs on your machine; your code never leaves it; no key. The endpoint is configurable via ECOCODE_OLLAMA_BASE_URL (HTTP or HTTPS).
• Remote (Anthropic): higher quality, but your source is sent to the API, so it needs your own key via the ECOCODE_LLM_API_KEY environment variable. The key is read only from the environment — never stored in ecocode.toml, VS Code settings, or the repository.

export ECOCODE_LLM_API_KEY="sk-ant-..."   # only needed for the remote provider

Full documentation

If you want full details (commands, outputs, examples, roadmap, etc.), see the complete project documentation:

documentation.md

Contributing

If the project interests you and you want to help:

You can:

• propose new features,
• add new functionality,
• fix potential issues and bugs,
• improve the app's reliability,
• submit pull requests.

See also:

• CONTRIBUTING.md
• docs/ROADMAP.md