Add perf triage for this week (#6426)

Author: Mark-Simulacrum

draft/2025-03-05-this-week-in-rust.md

@@ -111,7 +111,15 @@ If you are an event organizer hoping to expand the reach of your event, please s
 
 ### Rust Compiler Performance Triage
 
-<!-- Perf results go here -->
+A pretty quiet week, with minimal changes in performance (positive or negative).
+
+Triage done by **@simulacrum**.
+Revision range: [f5729cfe..daf59857](https://perf.rust-lang.org/?start=f5729cfed3c45e061e8a443677fc1d5ef9277df7&end=daf59857d6d2b87af4b846316bf1561a6083ed51&absolute=false&stat=instructions%3Au)
+
+1 Regressions, 4 Improvements, 1 Mixed; 2 of them in rollups
+29 artifact comparisons made in total
+
+[Full report here](https://github.com/rust-lang/rustc-perf/blob/master/triage/2025-03-03.md)
 
 ### [Approved RFCs](https://github.com/rust-lang/rfcs/commits/master)