Spotting and Avoiding Heap Fragmentation in Rust Applications

• rfcs

  666 5,700 9.8 Markdown

  RFCs for changes to Rust

  

I'm not sure it's the case that there's something "wrong" with the default allocator, but rather that there are different tradeoffs at play. There's an old but good discussion of the issue here https://github.com/rust-lang/rfcs/blob/master/text/1183-swap...

• tcmalloc

  15 4,069 9.8 C++
  

> * Switching from libc malloc to tcmalloc (dating myself a little bit)

If you think of tcmalloc as an old crusty allocator, you've probably only seen the gperftools version of it.

This is the version Google now uses internally: https://github.com/google/tcmalloc

It's worth a fresh look. In particular, it supports per-CPU caches as an alternative to per-thread caches. Those are fantastic if you have a lot more threads than CPUs.

• WorkOS

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• hubris

  33 2,790 9.4 Rust

  A lightweight, memory-protected, message-passing kernel for deeply embedded systems.

  

everywhere, for example in https://github.com/oxidecomputer/hubris/search?q=dyn

Is Box really allocating here? Is the "Rust By Example" text incomplete?

Then I had to stop learning Rust for other reasons, but this doubt really hit me at the time.

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