organize differently, added criterion as dev-dependency for benchmarks

src/main/rust/Cargo.toml

@@ -15,10 +15,37 @@ rayon = "1.10.0"
 rustc-hash = "2.0.0"
 libc = "0.2.155"
 
+[dev-dependencies]
+criterion = { version = "0.5", features = ["html_reports"] }
+
 [features]
 json = []
 unsafe = []
 
+[[bench]]
+name = "reference_impl"
+harness = false
+
+[[bench]]
+name = "single_thread"
+harness = false
+
+[[bench]]
+name = "multi_threaded"
+harness = false
+
+[[bench]]
+name = "polars"
+harness = false
+
+[[bench]]
+name = "flare_flo"
+harness = false
+
+[[bench]]
+name = "phcs"
+harness = false
+
 [profile.release]
 lto = "fat"
 strip = "symbols"