---
title: "param_sweep.py"
description: "Finds the best settings for a solver by trying several on the same instances."
---

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# param_sweep.py

## What it does

Tunes a solver: runs OR-Tools with several parameter settings on the same instances, then shows per
setting how many instances were solved and how fast. All settings are one experiment, so adding a
setting and running again only runs the new setting.

## Use it

```sh
python examples/scripts/param_sweep.py instances/ --out results/sweep --time-limit 60 --jobs 4
```

Edit `SETTINGS` in the script for your own settings and solver.

## Options

| Argument | |
|---|---|
| `sources` | instance files, directories or glob patterns |
| `--out` | output directory |
| `--time-limit` | seconds per run |
| `--jobs` | runs in parallel |

## Implementation

Source: https://docs.cpbenchy.com/examples/param-sweep/index.mdx