Optimize large repo file listing performance

crates/cli/src/main.rs

@@ -155,26 +155,56 @@ fn main() -> Result<()> {
             ProgressStyle::default_bar()
                 .template("{spinner:.green} [{elapsed_precise}] [{bar:40.cyan/blue}] {pos}/{len} files ({percent}%) | {msg}")
                 .unwrap()
-                .progress_chars("#>-"),
+                .progress_chars("#>-")
         );
-        pb.set_message("Scanning files...");
+        pb.set_message("Starting scan...");
+
+        // Show immediate feedback
+        pb.println("🔍 Initializing scanner and discovering files...");
 
         cfg.progress_callback = Some(Arc::new(move |processed, total, findings| {
-            pb.set_length(total as u64);
-            pb.set_position(processed as u64);
-            pb.set_message(format!("Found {} findings", findings));
+            if total > 0 {
+                pb.set_length(total as u64);
+                pb.set_position(processed as u64);
+                if processed == 0 {
+                    pb.set_message(format!("Found {} files to scan", total));
+                } else if processed < total {
+                    pb.set_message(format!("Processing files... {} findings so far", findings));
+                } else {
+                    pb.set_message(format!("Completed! Found {} findings", findings));
+                }
+            } else {
+                pb.set_message("Discovering files...");
+            }
+        }));
+    }
+
+    // Stream JSONL findings as they arrive
+    if args.json {
+        cfg.result_callback = Some(Arc::new(move |f: &Finding| {
+            if let Ok(s) = serde_json::to_string(f) {
+                println!("{}", s);
+            }
         }));
     }
 
     let scanner = Scanner::new(&reg, dets, cfg);
     if args.dry_run {
+        if !args.progress {
+            eprintln!("🔍 Discovering files...");
+        }
         let files = scanner.discover_files(&args.paths);
         for p in files {
             println!("{}", p.display());
         }
         return Ok(());
     }
 
+    // Show startup message if not using progress bar
+    if !args.progress && !args.json {
+        eprintln!("🔍 Starting scan of {} path(s)...", args.paths.len());
+    }
+
     let findings = scanner.run(&args.paths)?;
 
     // Clear progress bar if it was shown
@@ -183,9 +213,7 @@ fn main() -> Result<()> {
     }
 
     if args.json {
-        for f in &findings {
-            println!("{}", serde_json::to_string(f)?);
-        }
+        // Already streamed above
     } else {
         print_table(&findings);
     }