Rspack sftrace

Overview

Use sftrace (LLVM XRay) to trace rspack's Rust function calls and convert them to perfetto protobuf format for performance analysis and troubleshooting.

Default workflow: run inside the target example directory (for example examples/react) and store all trace artifacts in that directory (not /tmp).

Workflow

1) Build sftrace tools

git clone https://github.com/quininer/sftrace
cd sftrace
cargo build --release
mkdir "$(./target/release/sftrace record --print-solib-install-dir)"
cp ./target/release/libsftrace.so "$(./target/release/sftrace record --print-solib-install-dir)/"