The megamalloc crate packages up all the Rust allocator crates, exposing their metrics through a consistent interface, providing tools to compare performance and tweak configurations.

It supports the following features:

• global - Define the global allocator (default)
• system_alloc - Use the system allocator (default)
• jemalloc - Use jemalloc
• ralloc - Use ralloc
• tcmalloc - Use tcmalloc

The megamalloc global allocator wraps the global allocator of whichever implementation is selected, and provides additional methods.

/// Returns a string uniquely naming the allocator
pub fn name(&self) -> &'static str;
/// Returns allocator-dependent metrics as a `Vec` of `(str, usize)`
pub fn fetch_stats(&self) -> Result<Option<AllocStats>>;

Metrics are implemented for glibc malloc (the system allocator on most linux targets), jemalloc, and tcmalloc.

That's all for now. More in the future.