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[rustc.git] / vendor / packed_simd / perf-guide / src / prof / profiling.md

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+# Performance profiling
+
+While the rest of the book provides practical advice on how to improve the performance
+of SIMD code, this chapter is dedicated to [**performance profiling**][profiling].
+Profiling consists of recording a program's execution in order to identify program
+hotspots.
+
+**Important**: most profilers require debug information in order to accurately
+link the program hotspots back to the corresponding source code lines. Rust will
+disable debug info generation by default for optimized builds, but you can change
+that [in your `Cargo.toml`][cargo-ref].
+
+[profiling]: https://en.wikipedia.org/wiki/Profiling_(computer_programming)
+[cargo-ref]: https://doc.rust-lang.org/cargo/reference/manifest.html#the-profile-sections