working, now onto speeding it up

.gitignore

@@ -1 +1,4 @@
 /target
+perf.data
+flamegraph.svg
+perf.data.old

.vscode/launch.json

@@ -9,7 +9,7 @@
             "request": "launch",
             "name": "Debug executable 'surreal_spider'",
             "env": {
-                "RUST_LOG": "surreal_spider=trace,reqwest=trace",
+                "RUST_LOG": "surreal_spider=debug,reqwest=info",
             },
             "cargo": {
                 "args": [

src/db.rs

@@ -8,6 +8,8 @@ use surrealdb::{
 use tracing::{debug, error, instrument, trace, warn};
 use url::Url;
 
+use crate::Timer;
+
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Website {
     /// The url that this data is found at
@@ -57,6 +59,10 @@ impl Website {
         let from = self.site.to_string();
         // let to = other.site.to_string();
         trace!("Linking {from} to {} other pages.", other.len());
+        let msg = format!("Linked {len} pages");
+        let timer = Timer::start(&msg);
+        // prevent the timer from being dropped instantly.
+        let _ = timer;
         match db
             .query("COUNT(RELATE (SELECT id FROM website WHERE site = $in) -> links_to -> $out)")
             .bind(("in", from))
@@ -71,7 +77,7 @@ impl Website {
                     let _: Vec<usize> = vec;
                     if let Some(num) = vec.get(0) {
                         if *num == len {
-                            debug!("Link OK");
+                            trace!("Link OK");
                             return;
                         } else {
                             warn!("Didn't link all the records. {num}/{len}");

src/main.rs

@@ -51,10 +51,7 @@ async fn main() {
 
         for mut site in uncrawled {
             if let Some(dom) = get(&mut site, &db).await {
-                trace!("Pre-walk checkpoint");
-                
                 crawl_wrapper(&dom, &db, &site, &mut crawled).await;
-
                 let percent = format!("{:.2}%", (crawled as f32/budget as f32) * 100f32);
                 info!("Crawled {crawled} out of {budget} pages. ({percent})");
             } else {
@@ -69,10 +66,9 @@ async fn main() {
 
 async fn crawl_wrapper(dom: &Rc<Node>, db: &Surreal<Client>, site: &Website, count: &mut usize) {
     let mut buffer = Vec::new();
-    let now = Instant::now();
+    let timer= Timer::start("Walked");
     walk(&dom, &db, &site, &mut buffer).await;
-    let dif = now.elapsed().as_micros();
-    trace!("{}", format!("Walked in {:.3}ms", dif as f64/1000.));
+    drop(timer);
     site.links_to(buffer, &db).await;
     *count += 1;
 }
@@ -81,10 +77,9 @@ async fn crawl_wrapper(dom: &Rc<Node>, db: &Surreal<Client>, site: &Website, cou
 /// A quick helper function for downloading a url
 async fn get(site: &mut Website, db: &Surreal<Client>) -> Option<Rc<Node>> {
     trace!("Get: {}", site.to_string());
-    let now = Instant::now();
+    let timer = Timer::start("Got page");
     if let Ok(response) = reqwest::get(site.to_string()).await {
-        let dif = now.elapsed().as_micros();
-        trace!("{}", format!("Got page in {:.3}ms", dif as f64/1000.));
+        drop(timer);
 
         let data = response.text().await.unwrap();
         let opts = ParseOpts {
@@ -165,3 +160,21 @@ async fn get_uncrawled_links(db: &Surreal<Client>, mut count: usize) -> Vec<Webs
     response.take(0).expect("Returned websites couldn't be parsed")
 }
 
+pub struct Timer<'a> {
+    start: Instant,
+    msg: &'a str,
+}
+
+impl<'a> Timer<'a> {
+    #[inline]
+    pub fn start(msg: &'a str) -> Self {
+        Self { start: Instant::now(), msg }
+    }
+}
+
+impl<'a> Drop for Timer<'a> {
+    fn drop(&mut self) {
+        let dif = self.start.elapsed().as_micros();
+        debug!("{}", format!("{} in {:.3}ms", self.msg, dif as f64/1000.));
+    }
+}