[BE] Log interface time with DB

backend/src/main.rs

@@ -2,6 +2,7 @@ use cors::Cors;
 use sqlx::Connection;
 use sqlx::MySqlConnection;
 use std::env;
+use std::time::Instant;
 
 #[macro_use]
 extern crate rocket;
@@ -27,7 +28,10 @@ pub async fn db() -> Result<MySqlConnection, String> {
         Err(_) => return Err("env DATABASE_URL not found".to_string()),
     };
 
+    let start = Instant::now();
     let conn = sqlx::MySqlConnection::connect(db_url.as_str()).await;
+    let duration = start.elapsed();
+    log::info!("DB connection took: {:?} ms", duration.as_millis());
 
     match conn {
         Ok(connection) => Ok(connection),

backend/src/model/register.rs

@@ -1,4 +1,7 @@
-use std::collections::{HashMap, HashSet};
+use std::{
+    collections::{HashMap, HashSet},
+    time::Instant,
+};
 
 use rocket::form::validate::Contains;
 use serde::{Deserialize, Serialize};
@@ -249,7 +252,15 @@ impl RegisterCreate {
         );
 
         let mut db = db().await?;
-        match db.fetch_all(sql.as_str()).await {
+
+        let start = Instant::now();
+        let result = db.fetch_all(sql.as_str()).await;
+        log::info!(
+            "DB query (batch create) took: {:?} ms",
+            start.elapsed().as_millis()
+        );
+
+        match result {
             Ok(_) => Ok(()),
             Err(err) => {
                 log::error!("Error fetching course & person: {:?}", err);