How to profile these benchmarks

Windows

We'll be profiling these benchmarks with Visual Studio. Make sure you have basic C/C++ payloads installed for it.

Add the following beneath the [[bench]] line in Cargo.toml:
```
[profile.bench]
debug = true
```
Build the benchmark without running it with cargo bench --no-run
Locate the benchmark binary at target/release/deps/bench-*.exe. If there are multiple bench executables in deps, you can determine which one is the most recent by deleting all of them and rebuilding.
Start Visual Studio and open a new project. Browse to the .exe location and open it.
Right click on the bench-* project in the Solution Explorer and select Properties.
Set the Arguments parameter to --bench <FILTER> where <FILTER> is the filter you would pass to cargo bench -- <FILTER>.
Save the project properties and select Debug > Performance Profiler....
Check CPU Usage and click Start. The benchmarks will run and upon finishing the data will be analyzed.
Select the areas of the diagnostics session when your benchmark is running to analyze.

Know how to profile these benchmarks on other platforms? Open a pull request!