added summary

Author: pnkfelix

triage/2024-02-20.md

@@ -1,6 +1,8 @@
 # 2024-02-20 Triage Log
 
-TODO: Summary
+Relatively few PRs affecting performance, but massive improvements thanks to the
+update to LLVM 18 (PR #12005), as well as the merging of two related compiler
+queries (PR #120919) and other small improvements from a rollup (PR #121055).
 
 Triage done by **@pnkfelix**.
 Revision range: [74c3f5a1..5af21304](https://perf.rust-lang.org/?start=74c3f5a146860c94ff4d179fc3bfa34f879adf41&end=5af2130440c198afefbe5b8099342057cf272ef4&absolute=false&stat=instructions%3Au)