test: add simple benchmarks using divan

Cargo.toml

@@ -22,6 +22,7 @@ serde = { version = "1.0.127", optional = true, features = ["derive"] }
 strum = {version = "0.25.0", optional = true, features = ["derive"] }
 
 [dev-dependencies]
+divan = "0.1.11"
 serde_json = "1.0.66"
 
 [build-dependencies]
@@ -31,3 +32,7 @@ quote = "1.0.35"
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
+
+[[bench]]
+name = "parse"
+harness = false

benches/parse.rs

@@ -0,0 +1,21 @@
+use std::str::FromStr;
+
+fn main() {
+    // Run registered benchmarks.
+    divan::main();
+}
+
+#[divan::bench]
+fn parse_code() {
+    iso_currency::Currency::from_code("EUR").unwrap();
+}
+
+#[divan::bench]
+fn parse_numeric() {
+    iso_currency::Currency::from_numeric(978).unwrap();
+}
+
+#[divan::bench]
+fn from_str() {
+    iso_currency::Currency::from_str("SEK").unwrap();
+}