⚡ Bolt: [performance improvement]

.jules/bolt.md

@@ -0,0 +1,3 @@
+## 2024-05-24 - [Avoid Unnecessary Vec Allocations for Iterator Output]
+**Learning:** Using `.collect::<Vec<_>>().join("")` allocates an unnecessary intermediate `Vec` when building strings from iterators. Using `.collect::<String>()` performs the same logic without intermediate vector allocations. Also replacing `.split("\n").collect::<Vec<&str>>().into_iter()` with `.split('\n')` and similar for space separating eliminates multiple `Vec` allocations during string formatting.
+**Action:** Always prefer `.collect::<String>()` over `.collect::<Vec<_>>().join("")` when concatenating string components in Rust. For string splitting, use direct iterator methods over intermediate collection.

xdk-build/src/python.rs

@@ -159,16 +159,13 @@ fn run_formatter(output_dir: &Path, venv_python_path: &Path, script_path: &Path)
     let stdout = String::from_utf8_lossy(&output.stdout);
     if !stdout.trim().is_empty() {
         println!();
-        stdout
-            .split("\n")
-            .collect::<Vec<&str>>()
-            .into_iter()
-            .for_each(|line| {
-                let parts = line.split(" ").collect::<Vec<&str>>();
-                if parts.len() == 2 {
-                    log_info!("{} {}", parts[0], parts[1].magenta());
-                }
-            });
+        // Optimization: Use character splits and avoid allocating Vecs for lines and parts
+        for line in stdout.split('\n') {
+            let mut parts = line.split(' ');
+            if let (Some(part0), Some(part1), None) = (parts.next(), parts.next(), parts.next()) {
+                log_info!("{} {}", part0, part1.magenta());
+            }
+        }
         println!();
     }
 

xdk-lib/src/casing.rs

@@ -29,11 +29,7 @@ impl Casing {
                     result
                 }
             }
-            Casing::Pascal => words
-                .iter()
-                .map(|w| pascal_case(w))
-                .collect::<Vec<_>>()
-                .join(""),
+            Casing::Pascal => words.iter().map(|w| pascal_case(w)).collect::<String>(), // Optimization: Use collect::<String>() directly instead of collecting to Vec and joining
             Casing::Kebab => words.join("-").to_lowercase(),
             Casing::ScreamingSnake => words.join("_").to_uppercase(),
         }