#global-allocator #memory #debugging #metrics #allocation #track

no-std alloc-metrics

A global allocator that tracks allocation metrics

2 releases

0.1.1 Jan 19, 2024
0.1.0 Jan 18, 2024

#212 in Memory management


149 lines


alloc-metrics is a simple crate that adds a new global allocator type that tracks the total number of allocations and actual bytes allocated. In typical programs, this could be useful to get a plot of memory utilization over time for debugging purposes, or could be used in interpreter runtimes to limit the amount of memory a script is allowed to use.


To get started using alloc-metrics, you must first set the global allocator for your project:

use alloc_metrics::MetricAlloc;

static GLOBAL: MetricAlloc<std::alloc::System> = MetricAlloc::new(std::alloc::System);

Note that the MetricAlloc type is able to wrap any existing global allocator type. Thus, you can compose the features of alloc-metrics with any other global allocator you want.


  • thread: gives access to thread-local allocation metrics (requires std).
  • global: gives access to global allocation metrics.


This crate is fully compatible in no-std environments by disabling default features:

alloc-metrics = { version = "...", default-features = false, features = ["global"] }

Note that we re-enabled the global feature so that we still have access to global allocation metrics (see feature list above).


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