add perf triage for 2025-09-17 issue

Author: panstromek

draft/2025-09-17-this-week-in-rust.md

@@ -141,7 +141,26 @@ If you are an event organizer hoping to expand the reach of your event, please s
 
 ### Rust Compiler Performance Triage
 
-<!-- Perf results go here -->
+Difficult week to interpret, because a positive change in [#145910](https://github.com/rust-lang/rust/pull/145910) skewes the results more negative in our benchmarks. Overall result is probably still slightly negative, because there's more work from added features. On the other hand, we also have a nice improvement in reducing the number of query dependencies in compiler's tracking system in [#145186](https://github.com/rust-lang/rust/pull/145186).
+
+Triage done by **@panstromek**.
+Revision range: [f13ef0d7..52618eb3](https://perf.rust-lang.org/?start=f13ef0d75d834c826c9479a5d244bcfb9891df45&end=52618eb338609df44978b0ca4451ab7941fd1c7a&absolute=false&stat=instructions%3Au)
+
+**Summary**:
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.5%  | [0.2%, 2.7%]   | 72    |
+| Regressions ❌ <br /> (secondary)  | 0.7%  | [0.0%, 3.5%]   | 96    |
+| Improvements ✅ <br /> (primary)   | -0.5% | [-0.9%, -0.1%] | 10    |
+| Improvements ✅ <br /> (secondary) | -0.8% | [-2.9%, -0.1%] | 41    |
+| All ❌✅ (primary)                 | 0.4%  | [-0.9%, 2.7%]  | 82    |
+
+
+1 Regression, 1 Improvement, 6 Mixed; 3 of them in rollups
+36 artifact comparisons made in total
+
+[Full report here](https://github.com/rust-lang/rustc-perf/blob/e0539d750ab104f1bd884f60a21a1e0355981d20/triage/2025/2025-09-15.md)
 
 ### [Approved RFCs](https://github.com/rust-lang/rfcs/commits/master)