# Heater 

A Rust command-line application that churns your CPU cores at maximum capacity so your laptop isn't cold

## Build

```bash
cargo build --release
```

The compiled binary will be at `target/release/heater`.

## Usage

### Run indefinitely (until Ctrl+C)
```bash
cargo run --release
# or
./target/release/heater
```

### Run for a specific duration (in seconds)
```bash
cargo run --release -- --duration 30
# or
./target/release/heater --duration 30
```

### Customize the number of free cores
```bash
# Leave 2 cores free
cargo run --release -- --free-cores 2

# Use ALL cores (leave 0 free)
cargo run --release -- --free-cores 0

# Run for 60 seconds, leaving 2 cores free
cargo run --release -- --duration 60 --free-cores 2
```

## Options

```
-d, --duration <DURATION>      Duration to run in seconds (omit for indefinite run)
-f, --free-cores <FREE_CORES>  Number of cores to leave free (default: 1)
-g, --gpu                      Enable GPU usage (makes more heat)
-h, --help                     Print help
-V, --version                  Print version
```