The Rust Performance Book (2020)

I got a ton of value from this book. It actually pushed me to dive deeper into profiling and eventually start building Rust perf tooling of my own https://github.com/pawurb/hotpath-rs

Nicholas Nethercote is, of course, the author of the "How to speed up the Rust compiler" series of articles [1], which I found fascinating. He spent quite some time at Mozilla optimizing rustc internals. Kudos for his work, and for making Rust compilation faster for all of us. ^[1]: https://blog.mozilla.org/nnethercote/category/rust/

Previous discussions: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

Section 8 "Heap allocations": > Heap allocations are moderately expensive. The exact details depend on which allocator is in use, but each allocation (and deallocation) typically involves acquiring a global lock, doing some non-trivial data structure manipulation, and possibly executing a system call. One sure hopes it doesn't take a global lock for each allocation; I don't think jemalloc does.