Crate smelt_perf 

Lightweight allocation + timing instrumentation.

Two coordinated pieces:

• alloc::Counting — global allocator shim that bumps process and per-thread counters when alloc::enable has been called. Cheap when disabled.
• perf::begin — RAII scope guards that record duration and per-thread alloc deltas under a &'static str label. Snapshot via perf::snapshot, pretty-print via perf::print_summary.

Designed to be embedded in any binary: install Counting as #[global_allocator], call alloc::enable() and perf::enable() early in main, sprinkle let _g = perf::begin(...); around interesting scopes.

Modules

alloc

Counting global-allocator shim. Process-wide counters always update so peak / current / dealloc stats stay consistent across the whole run; per-thread tallies (used by crate::perf::Guard) only update when enable has been called. Install via #[global_allocator] in the binary crate.

perf

Labelled scope guards plus a pretty-printer.