Made add in codegen faster

Cargo.lock

@@ -45,6 +45,12 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "bytecount"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175812e0be2bccb6abe50bb8d566126198344f707e304f45c648fd8f2cc0365e"
+
 [[package]]
 name = "bytes"
 version = "1.11.1"
@@ -493,6 +499,7 @@ dependencies = [
 name = "mist-codegen"
 version = "0.3.3-alpha.0"
 dependencies = [
+ "bytecount",
  "mist-parser",
 ]
 

crates/codegen/Cargo.toml

@@ -9,4 +9,5 @@ keywords = ["compiler", "language", "mist"]
 categories = ["compilers"]
 
 [dependencies]
+bytecount = "0.6.9"
 mist-parser = { workspace = true }

crates/codegen/src/lib.rs

@@ -50,15 +50,17 @@ impl RustCodegen {
     }
 
     fn add(&mut self, s: &str) {
-        for b in s.bytes() {
-            if b == b'\n' {
-                self.position.0 += 1;
-                self.position.1 = 0;
-            } else {
-                self.position.1 += 1;
-            }
+        let newline_count = bytecount::count(s.as_bytes(), b'\n');
+    
+        if newline_count == 0 {
+            self.position.1 += s.len();
+        } else {
+            self.position.0 += newline_count;
+    
+            let last_newline = s.rfind('\n').unwrap();
+            self.position.1 = s.len() - last_newline - 1;
         }
-
+    
         self.output.push_str(s);
     }