uodate performance-on-cpu.md

Signed-off-by: Roshan Khatri <[email protected]>

topics/performance-on-cpu.md

@@ -37,20 +37,18 @@ For a proper On-CPU analysis, Valkey (and any dynamically loaded library like
 Valkey Modules) requires stack traces to be available to tracers, which you may
 need to fix first. 
 
-By default, Valkey is compiled with the `-O3` optimization flag, which enables 
-a high level of compiler optimizations that aim to maximize runtime performance. 
-These optimizations can significantly enhance performance. Valkey is also compiled with 
-the `-fno-omit-frame-pointer` flag by default, ensuring that the frame pointer is preserved across 
-function calls. This combination allows for precise stack walking and call stack tracing, 
-which is essential for accurate profiling and debugging.  Keeping the frame pointer 
+By default, Valkey is compiled with the `-O3` optimization flag (which we intent to keep
+during profiling). This means that compiler optimizations are enabled which significantly 
+enhance the performance. Valkey is also compiled with the `-fno-omit-frame-pointer` flag 
+by default, ensuring that the frame pointer is preserved across function calls. 
+This combination allows for precise stack walking and call stack tracing, 
+which is essential for accurate profiling and debugging. Keeping the frame pointer 
 intact helps profiling tools like `perf`, `gdb`, and others correctly attribute on-CPU 
 time to deeper call stack frames, leading to more reliable insights into performance bottlenecks 
 and hotspots. This setup strikes a balance between maintaining a highly optimized executable 
 and ensuring that profiling and tracing tools provide accurate and actionable data.
 
 It's important that you ensure that:
-- debug information is present: compile option `-g`
-- frame pointer register is present: `-fno-omit-frame-pointer`
 - we still run with optimizations to get an accurate representation of production run times, meaning we will keep: `-O3`
 
 You can do it as follows within valkey main repo: