v2.48.2

calcom/cal.diyv2.48.2Mar 25, 2026by github-actions[bot]

AI Summary

Introduces a parallel backends feature that allows the crawler to race multiple browser engines (like LightPanda and Servo) against each other, utilizing the best HTML result to bypass bot protection.

Key Highlights

Race alternative browser engines alongside the primary crawl
Best HTML wins mechanism to improve reliability and bypass anti-bot measures
Zero overhead when disabled with anti-fingerprint jitter

New Features

Parallel backends configuration for racing engines
Quality validator for selecting the best HTML result
Full network interception parity with Chrome
Custom backend support via BackendEngine::Custom

Full Release Notes

Race alternative browser engines alongside your primary crawl. Best HTML wins.

```rust
use spider::configuration::{BackendEndpoint, BackendEngine, ParallelBackendsConfig};

let mut website = Website::new("https://example.com");
website.configuration.parallel_backends = Some(ParallelBackendsConfig {
    backends: vec![BackendEndpoint {
        engine: BackendEngine::LightPanda,
        endpoint: Some("ws://127.0.0.1:9222".to_string()),
        binary_path: None,
        protocol: None,
    }],
    ..Default::default()
});
website.crawl().await;
// page.backend_source → "primary" | "lightpanda" | "servo" | "custom"
```

Features: `lightpanda`, `servo`, `parallel_backends_full`, custom backends via `BackendEngine::Custom`.

Zero overhead when disabled, anti-fingerprint jitter, auto-disable on failures, custom quality validator, full network interception parity with Chrome.