diff --git a/crates/ptth_kv/src/main.rs b/crates/ptth_kv/src/main.rs
index 28f088b..95b6476 100644
--- a/crates/ptth_kv/src/main.rs
+++ b/crates/ptth_kv/src/main.rs
@@ -308,4 +308,38 @@ mod tests {
 			tuples: vec! []
 		});
 	}
+	
+	#[test]
+	#[cfg (not (debug_assertions))]
+	fn perf () {
+		use std::time::Instant;
+		
+		let s = Store::new (vec! [
+			(b"key_dir".to_vec (), StatusQuotas {
+				max_keys: 4,
+				max_key_bytes: 16,
+				max_value_bytes: 16,
+				max_payload_bytes: 128,
+			}),
+		].into_iter ());
+		
+		let num_iters = 1_000_000;
+		
+		let key = b"foo".to_vec ();
+		
+		let start_time = Instant::now ();
+		
+		for i in 0..num_iters {
+			let value = format! ("{}", i);
+			
+			s.set (b"key_dir", key.clone (), value.into ());
+		}
+		
+		let end_time = Instant::now ();
+		let total_dur = end_time - start_time;
+		
+		let avg_nanos = total_dur.as_nanos () / num_iters;
+		
+		assert! (avg_nanos < 200);
+	}
 }
diff --git a/docs/build-artifacts.md b/docs/build-artifacts.md
new file mode 100644
index 0000000..fc48ef9
--- /dev/null
+++ b/docs/build-artifacts.md
@@ -0,0 +1,12 @@
+# Build artifact log
+
+## 2021-01Jan-03
+
+Git commit 88e7839841ad812f5645a30503955511ac107bdd
+
+Sizes:
+
+- ptth_relay: 11 MB
+- ptth_server: 14 MB
+- ptth_relay gzipped: 3 MB
+- ptth_server gzipped: 5 MB