Add send_events benchmark

benches/send_events.rs

@@ -0,0 +1,42 @@
+use criterion::async_executor::AsyncStdExecutor;
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use deltachat::context::Context;
+use deltachat::{info, Event, EventType};
+use tempfile::tempdir;
+
+async fn send_events_benchmark(context: &Context) {
+    let emitter = context.get_event_emitter();
+    for _i in 0..1_000_000 {
+        info!(context, "interesting event...");
+    }
+    info!(context, "DONE");
+
+    loop {
+        match emitter.recv().await.unwrap() {
+            Event {
+                typ: EventType::Info(info),
+                ..
+            } if info.contains("DONE") => {
+                break;
+            }
+            _ => {}
+        }
+    }
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let dir = tempdir().unwrap();
+    let dbfile = dir.path().join("db.sqlite");
+    let id = 100;
+    let context =
+        async_std::task::block_on(async { Context::new(dbfile.into(), id).await.unwrap() });
+
+    c.bench_function("Sending 1000 events", |b| {
+        b.to_async(AsyncStdExecutor)
+            .iter(|| send_events_benchmark(&context))
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);