smelt-perf

Lightweight allocation and timing instrumentation.

Two coordinated pieces:

• alloc::Counting: a 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, then sprinkle let _g = perf::begin("scope.label"); around interesting scopes.

use smelt_perf::{alloc, perf};

#[global_allocator]
static A: alloc::Counting = alloc::Counting;

fn main() {
    alloc::enable();
    perf::enable();

    let _g = perf::begin("work");
    // ... do work ...
    drop(_g);

    perf::print_summary();
}

Part of the smelt project but usable standalone.

License

MIT