diff --git a/Cargo.toml b/Cargo.toml
index f7a6715..3d005fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,5 +17,8 @@ readme = "README.md"
 criterion = "0.4.0"
 
 [[bench]]
-name = "basic"
+name = "tokenise"
+harness = false
+[[bench]]
+name = "format"
 harness = false
diff --git a/benches/format.rs b/benches/format.rs
new file mode 100644
index 0000000..8d7122f
--- /dev/null
+++ b/benches/format.rs
@@ -0,0 +1,25 @@
+use std::collections::BTreeMap;
+use criterion::{criterion_group, criterion_main, Criterion};
+use irctokens::Line;
+
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let line = Line {
+        tags: Some(BTreeMap::from([
+            ("tag1".to_string(), Some("tag1value".to_string())),
+            ("tag2".to_string(), None),
+            ("tag3".to_string(), Some("a;a".to_string())),
+        ])),
+        source: Some(b"source".to_vec()),
+        command: "COMMAND".to_string(),
+        args: Vec::from([
+            b"arg1".to_vec(),
+            b"arg2".to_vec(),
+            b"arg3 with space".to_vec(),
+        ]),
+    };
+    c.bench_function("basic", |b| b.iter(|| line.format()));
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);
diff --git a/benches/basic.rs b/benches/tokenise.rs
similarity index 66%
rename from benches/basic.rs
rename to benches/tokenise.rs
index 29a5007..a590d7f 100644
--- a/benches/basic.rs
+++ b/benches/tokenise.rs
@@ -1,8 +1,8 @@
 use criterion::{criterion_group, criterion_main, Criterion};
-use irctokens::tokenise;
+use irctokens::Line;
 
 fn basic() {
-    tokenise(b"@tag1=tag1value;tag2=;tag3 :source COMMAND arg1 arg2 :arg3 with space").unwrap();
+    Line::tokenise(b"@tag1=tag1value;tag2=;tag3 :source COMMAND arg1 arg2 :arg3 with space").unwrap();
 }
 
 fn criterion_benchmark(c: &mut Criterion) {