chore: add profiling profile for flamegraph

.gitignore

@@ -15,3 +15,6 @@ assets/site/build.css
 # Coverage reports
 lcov.info
 coverage.html
+
+# Profiling output
+flamegraph.svg

Cargo.toml

@@ -50,6 +50,15 @@ serde_json = "1.0.143"
 [package.metadata.cargo-machete]
 ignored = ["phf"]
 
+# Release profile for profiling (essentially the default 'release' profile with debug enabled)
+[profile.profile]
+inherits = "release"
+debug = true
+# Undo the customizations for our release profile
+opt-level = 3
+lto = false
+panic = 'unwind'
+
 # LTO optimizations, no unwinding on panic, optimize for size
 [profile.release]
 lto = true