feat: 🎸 improve printBinary() performance

Author: streamich

src/printBinary.ts

@@ -1,9 +1,9 @@
 type Child = (tab: string) => string;
 
 export const printBinary = (tab = '', children: [left?: null | Child, right?: null | Child]): string => {
-  const [left, right] = children;
+  const left = children[0], right = children[1];
   let str = '';
-  if (left) str += `\n${tab}← ${left(tab + '  ')}`;
-  if (right) str += `\n${tab}→ ${right(tab + '  ')}`;
+  if (left) str += '\n' + tab + '← ' + left(tab + '  ');
+  if (right) str += '\n' + tab + '→ ' + right(tab + '  ');
   return str;
 };