benchfmt.rs: Bringing Go's Benchmarking and benchstat Workflow to Rust

The developer Bartłomiej Płotka released benchfmt.rs, a zero-dependency Rust benchmark runner that emits Go's benchfmt format and includes a Criterion and libtest converter, a thread-local heap allocation counter tracking B/op and allocs/op, pprof profiling, and the same CLI flags as `go test -bench`. The tool targets gaps in Rust's standard benchmarking stack—no standard case-comparison projections, heap allocation measurement, or pprof support—and is demonstrated on two workloads: a 36-line unsigned LEB128 varint decoder processing a 4,798-byte fixture of 2,000 uint64 values, and Prometheus Remote Write 2.0 protobuf decoding, benchmarked across Go and multiple Rust frameworks. The work matters because benchstat-style A/B microbenchmarking has been a Go-centric workflow, and a compatible format lets teams compare Rust implementations against each other and against Go without adopting a new runtime. All benchmark code and raw outputs are published in the bwplotka/benchmarks repository under rust-go-decode. Next to watch: whether the converter sees adoption beyond the author's own comparisons and whether Rust tooling converges on a shared benchmark format.