Crate densa_alloc 

Per-thread allocation counting, to prove hot paths never touch the heap.

Install CountingAllocator as the global allocator of a binary or test crate:

#[global_allocator]
static ALLOCATOR: densa_alloc::CountingAllocator = densa_alloc::CountingAllocator::system();

then wrap the code under test in measure. Counters are per thread, so other threads (test harness, workers) never pollute a measurement. Without the allocator installed all counters stay at zero; always check is_active first so a zero-allocation assertion cannot pass vacuously.

Structs

AllocStats

Heap operations observed on one thread.

CountingAllocator

A GlobalAlloc wrapper that counts every heap operation per thread.

Functions

is_active

true if CountingAllocator is the active global allocator.

measure

Runs f and returns its result with the heap operations it performed on this thread.

thread_stats

Snapshot of the calling thread’s cumulative counters.