investigate the use of a low-overhead async engine

refacktor-aws / aws-lambda-libc-runtime

An extremely small and fast AWS Lambda runtime with sub-5ms cold starts. Works with C and Rust. I call it "the Lambda libc runtime" because glibc is the only link-time dependency, and the choice of programming language binding is somewhat secondary to the design.

Mozilla Public License 2.0

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investigate the use of a low-overhead async engine #1

Open refacktor opened 2 hours ago

refacktor commented 2 hours ago

Investigate possible use of tokio::runtime::Builder::new_current_thread() or smol.

Reddit thread: https://www.reddit.com/r/rust/comments/1h40cdd/comment/lzxc0q1

Goals

Introduce lightweight async as an optional feature
Validate options and feasibility (tokio may conflict with no_main; not sure about smol)
Quantify and document the actual overhead involved, to help decide when to enable the feature.

refacktor commented 2 hours ago

Because of the way the Lambda Runtime interface works, this will only impact async processing within the handler. Handler invocation is always one-at-a-time synchronous.