fast_qr is approximately 6-7 times faster than qrcode, see benchmarks

You can create a QR as

• [x] Raw matrix, well suited for custom usage
• [x] Vectorized image, well suited for web usage
• [ ] Image, well suited for mobile / print usage

Usage

```rust use fast_qr::{ECL, Version, QRBuilder};

let qrcode = QRBuilder::new("https://example.com/".into()) .ecl(ECL::H) .version(Version::V03) .build();

// It is preferable to check qrcode result before qrcode.unwrap().print(); ```

Build WASM

WASM module also exists in NPM registry

Package is named fast_qr and can be installed like so :

npm install --save fast_qr

WASM module might be bundled

Find a bundled version in the latest release.

WASM module can be built from source

bash wasm-pack build --target web # All ready in ./pkg wasm-opt -Os -o pkg/fast_qr_bg.wasm pkg/fast_qr_bg.wasm # Optimizes wasm module size wasm-pack pack pkg # Generates the package to be published wasm-pack publish # you might need to `npm login`

Note: I found that wasm-opt doesn't always work, so I download the binary from WebAssembly/binaryen.

Benchmarks

According to the following benchmarks, fast_qr is approximately 6-7x faster than qrcode.

| Benchmark | Lower | Estimate | Upper | | | :----------- | :-------: | :-------: | :-------: | ----------------------- | | V03H/qrcode | 524.30 us | 535.02 us | 547.13 us | | | V03H/fastqr | 82.079 us | 82.189 us | 82.318 us | fastqr is 6.51x faster | | V10H/qrcode | 2.1105 ms | 2.1145 ms | 2.1186 ms | | | V10H/fastqr | 268.70 us | 269.28 us | 269.85 us | fastqr is 7.85x faster | | V40H/qrcode | 18.000 ms | 18.037 ms | 18.074 ms | | | V40H/fastqr | 2.4313 ms | 2.4362 ms | 2.4411 ms | fastqr is 7.40x faster |

More benchmarks can be found in /benches folder.