feat(gpodder_sqlite): added benchmarking support

gpodder_sqlite/Cargo.toml

@@ -3,6 +3,10 @@ name = "gpodder_sqlite"
 version = "0.1.0"
 edition = "2021"
 
+[[bench]]
+name = "devices"
+harness = false
+
 [dependencies]
 gpodder = { path = "../gpodder" }
 diesel = { version = "2.2.7", features = ["r2d2", "sqlite", "returning_clauses_for_sqlite_3_35"] }
@@ -11,3 +15,6 @@ tracing = "0.1.41"
 chrono = { version = "0.4.39", features = ["serde"] }
 rand = "0.8.5"
 libsqlite3-sys = { version = "0.31.0", features = ["bundled"] }
+
+[dev-dependencies]
+criterion = "0.5.1"

gpodder_sqlite/benches/common.rs

@@ -0,0 +1,16 @@
+use gpodder::{AuthStore, User};
+use gpodder_sqlite::SqliteRepository;
+
+pub fn setup() -> (SqliteRepository, Vec<User>) {
+    let store = SqliteRepository::in_memory().unwrap();
+    let mut users = Vec::new();
+
+    for i in 0..1000 {
+        let username = format!("test{}", i + 1);
+        let password_hash = format!("dummyhash{}", i + 1);
+
+        users.push(store.insert_user(&username, &password_hash).unwrap());
+    }
+
+    (store, users)
+}

gpodder_sqlite/benches/devices.rs

@@ -0,0 +1,28 @@
+mod common;
+
+use criterion::{criterion_group, criterion_main, Criterion};
+use gpodder::{DevicePatch, DeviceRepository};
+
+pub fn bench_devices_for_user(c: &mut Criterion) {
+    let (store, users) = common::setup();
+
+    for i in 0..100000 {
+        store
+            .update_device_info(
+                &users[i % users.len()],
+                &format!("device id {i}"),
+                DevicePatch {
+                    caption: Some(format!("device caption {i}")),
+                    r#type: None,
+                },
+            )
+            .unwrap();
+    }
+
+    c.bench_function("devices for user", |b| {
+        b.iter(|| store.devices_for_user(&users[0]).unwrap())
+    });
+}
+
+criterion_group!(devices, bench_devices_for_user);
+criterion_main!(devices);