bench: add a profiling profile that doesn't enable LTO for quick rebuilds

Cargo.toml

@@ -143,6 +143,13 @@ debug = 2
 inherits = "dbg"
 opt-level = 3
 
+[profile.profiling]
+inherits = "release"
+# LTO is too slow to compile.
+lto = false
+# Get symbol names for profiling purposes.
+debug = true
+
 [patch.crates-io]
 async-compat = { git = "https://github.com/jplatte/async-compat", rev = "16dc8597ec09a6102d58d4e7b67714a35dd0ecb8" }
 const_panic = { git = "https://github.com/jplatte/const_panic", rev = "9024a4cb3eac45c1d2d980f17aaee287b17be498" }

benchmarks/README.md

@@ -8,7 +8,7 @@ can be found [here](https://bheisler.github.io/criterion.rs/book/criterion_rs.ht
 
 ## Running the benchmarks
 
-The benchmark can be simply run by using the `bench` command of `cargo`:
+The benchmark can be run by using the `bench` command of `cargo`:
 
 ```bash
 $ cargo bench
@@ -16,6 +16,13 @@ $ cargo bench
 
 This will work from the workspace directory of the rust-sdk.
 
+To lower compile times, you might be interested in using the `profiling` profile, that's optimized
+for a fair tradeoff between compile times and runtime performance:
+
+```bash
+$ cargo bench --profile profiling
+```
+
 If you want to pass options to the benchmark [you'll need to specify the name of
 the benchmark](https://bheisler.github.io/criterion.rs/book/faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options):
 
@@ -23,7 +30,7 @@ the benchmark](https://bheisler.github.io/criterion.rs/book/faq.html#cargo-bench
 $ cargo bench --bench crypto_bench -- # Your options go here
 ```
 
-If you want to run only a specific benchmark, simply pass the name of the
+If you want to run only a specific benchmark, pass the name of the
 benchmark as an argument:
 
 ```bash
@@ -65,7 +72,7 @@ permisive value is `-1`:
 $ echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
 ```
 
-To generate flame graphs feature simply enable the profiling mode using the
+To generate flame graphs feature, enable the profiling mode using the
 `--profile-time` command line flag:
 
 ```bash