Run-time memory tracking and profiling.

Part of the rerun family of crates.

Includes an opt-in sampling profiler for allocation callstacks. Each time memory is allocated there is a chance a callstack will be collected. This information is tracked until deallocation. You can thus get information about what callstacks lead to the most live allocations, giving you a very useful memory profile of your running app, with minimal overhead.

lib.rs:

Run-time memory tracking and profiling.

See [AccountingAllocator] and [accounting_allocator].