perf: code golf .loc and .offset

src/collection.js

@@ -22,11 +22,13 @@ export class Collection {
 	 */
 	push(item, node_location) {
 		let index = this._total
+		let start = node_location.start
+		let start_offset = start.offset
 
-		this._node_lines[index] = node_location.start.line
-		this._node_columns[index] = node_location.start.column
-		this._node_offsets[index] = node_location.start.offset
-		this._node_lengths[index] = node_location.end.offset - node_location.start.offset
+		this._node_lines[index] = start.line
+		this._node_columns[index] = start.column
+		this._node_offsets[index] = start_offset
+		this._node_lengths[index] = node_location.end.offset - start_offset
 
 		if (this._items.has(item)) {
 			/** @type number[] */

src/index.js

@@ -66,7 +66,8 @@ export function analyze(css, options = {}) {
   }
 
   function stringifyNodePlain(node) {
-    return css.substring(node.loc.start.offset, node.loc.end.offset)
+    let loc = node.loc
+    return css.substring(loc.start.offset, loc.end.offset)
   }
 
   // Stylesheet
@@ -566,15 +567,15 @@ export function analyze(css, options = {}) {
           }
         }
 
-        let { property } = node
+        let { property, loc: { start } } = node
         let propertyLoc = {
           start: {
-            line: node.loc.start.line,
-            column: node.loc.start.column,
-            offset: node.loc.start.offset
+            line: start.line,
+            column: start.column,
+            offset: start.offset
           },
           end: {
-            offset: node.loc.start.offset + property.length
+            offset: start.offset + property.length
           }
         }