clean up comments

Author: duncanpharvey

crates/datadog-trace-agent/src/stats_flusher.rs

@@ -61,13 +61,16 @@ impl StatsFlusher for ServerlessStatsFlusher {
             }
         });
 
-        // flush stats from the bufferon a fixed interval
+        // flush stats from the buffer on a fixed interval
         loop {
             tokio::time::sleep(time::Duration::from_secs(config.stats_flush_interval_secs)).await;
 
             let mut buffer = buffer_consumer.lock().await;
+            // copy the batch for this flush
             let channel_stats = buffer.to_vec();
+            // reset the buffer so the next tick only sees new stats
             buffer.clear();
+            // release the mutex before flushing stats
             drop(buffer);
 
             let should_flush = should_flush_stats_buffer(