PizzasBear / sse-rs

What is sse-rs?

sse-rs delivers strictly compliant, memory-efficient libraries for Server-Sent Events (SSE) in Rust, tackling slow parsing and unreliable reconnection in existing tools. It splits into a no_std core parser for custom buffers and embedded use, plus a reqwest-based client that turns any HTTP request into an auto-reconnecting event stream. Developers get zero-I/O parsing, Last-Event-ID tracking, and exponential backoff out of the box for consuming SSE APIs.

Why is it gaining traction?

Benchmarks crush alternatives like eventsource-stream—up to 93x faster on fragmented streams and 42x on large payloads—thanks to zero-copy state-machine design. Strict compliance handles edge cases like retry events and BOMs perfectly, while reqwest integration adds seamless Open/Error events and transient error retries. The no_std support hooks Rustaceans building for constrained environments or custom stacks.

Who should use this?

Rust backend devs scraping SSE feeds from services like GitHub or Stripe, async app builders needing reliable streams without boilerplate, and embedded engineers parsing events over TCP. Ideal for web scrapers ditching flaky clients or services integrating real-time updates via reqwest.

Verdict

Grab sse-rs if you need top-tier SSE performance in Rust—docs are solid, benchmarks legit, tests thorough—but with 11 stars and 1.0% credibility, it's early-stage; monitor for production stability before prime time.

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