2025-04-16: Add Avoiding memory fragmentation in Rust with jemalloc

Author: Sylvain

draft/2025-04-16-this-week-in-rust.md

@@ -41,6 +41,7 @@ and just ask the editors to select the category.
 ### Project/Tooling Updates
 
 ### Observations/Thoughts
+* [Avoiding memory fragmentation in Rust with jemalloc](https://kerkour.com/rust-jemalloc)
 
 ### Rust Walkthroughs