850 inserts per second -> 1500 inserts per second

Makefile

@@ -41,6 +41,6 @@ clean:
 	@rm dlphn-$(VERSION)-*.tar.gz
 
 bench:
-	wrk -t20 -c200 -d 30s -s bench/post.lua http://localhost:8080/api/v1/streams/bench/data
+	wrk -t10 -c100 -d 30s -s bench/post.lua http://localhost:8080/api/v1/streams/bench/data
 
 .PHONY: bench ui ui-client ui-deps release all

README.md

@@ -59,23 +59,23 @@ $ dlphn
 
 ## benchmarks
 
-### post
+### logging data
 
-~850 inserts per second via the REST API. results from 2017 intel nuc 3.5GHz i7-7567U kaby lake:
+~1500 inserts per second via the REST API. results from 2017 intel nuc 3.5GHz i7-7567U kaby lake:
 
 ```sh
 $ make bench
 wrk -t10 -c100 -d 30s -s bench/post.lua http://localhost:8080/api/v1/streams/bench/data
 Running 30s test @ http://localhost:8080/api/v1/streams/bench/data
   10 threads and 100 connections
   Thread Stats   Avg      Stdev     Max   +/- Stdev
-    Latency   128.96ms  140.03ms   1.96s    96.39%
-    Req/Sec    87.02     11.70   120.00     62.27%
-  26085 requests in 30.10s, 1.87MB read
-  Socket errors: connect 0, read 0, write 0, timeout 35
+    Latency    84.69ms  147.65ms   2.00s    96.57%
+    Req/Sec   153.37     25.66   262.00     70.56%
+  45957 requests in 30.10s, 3.29MB read
+  Socket errors: connect 0, read 0, write 0, timeout 41
   Non-2xx or 3xx responses: 1
-Requests/sec:    866.51
-Transfer/sec:     63.47KB
+Requests/sec:   1526.97
+Transfer/sec:    111.84KB
 ```
 
 ## license

src/db/sqlite.rs

@@ -32,7 +32,8 @@ pub fn create_table(conn: Connection) -> Result<(), Error> {
        created         TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated         TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY(stream_id) REFERENCES streams(id)
-    );",
+    );
+    PRAGMA synchronous = OFF;",
   )?;
 
   Ok(())
@@ -93,13 +94,22 @@ pub fn list_data(conn: Connection, key: String) -> Result<Vec<Data>, Error> {
   Ok(results)
 }
 
-pub fn insert_data(conn: Connection, key: String, data: Map<String, Value>) -> Result<i64, Error> {
-  conn.execute("INSERT OR IGNORE INTO streams (key) VALUES (?)", &[&key])?;
+pub fn insert_data(
+  mut conn: Connection,
+  key: String,
+  data: Map<String, Value>,
+) -> Result<(), Error> {
+  let tx = conn.transaction()?;
 
-  let mut stmt = conn.prepare(
+  tx.execute("INSERT OR IGNORE INTO streams (key) VALUES (?)", &[&key])?;
+
+  tx.execute(
     "INSERT INTO data (payload, stream_id)
-    VALUES (?, (SELECT streams.id FROM streams WHERE streams.key = ?))",
+    SELECT ?, streams.id FROM streams WHERE streams.key = ?",
+    &[&Value::Object(data) as &dyn ToSql, &key],
   )?;
 
-  Ok(stmt.insert(&[&Value::Object(data) as &dyn ToSql, &key])?)
+  tx.commit()?;
+
+  Ok(())
 }