perf: concatenate openWakaBang just once

lddubeau · Aug 15, 2018 · 07345bf · 07345bf
1 parent f270e8b
commit 07345bf
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/saxes.js b/lib/saxes.js
@@ -734,7 +734,8 @@ class SaxesParser {
   /** @private */
   sOpenWakaBang(chunkState) {
     const c = String.fromCodePoint(this.getCode(chunkState));
-    switch (this.openWakaBang + c) {
+    this.openWakaBang += c;
+    switch (this.openWakaBang) {
     case "[CDATA[":
       if (!this.sawRoot && !this.reportedTextBeforeRoot) {
         this.fail("text data outside of root node.");
@@ -763,7 +764,6 @@ class SaxesParser {
       this.openWakaBang = "";
       break;
     default:
-      this.openWakaBang += c;
       // 7 happens to be the maximum length of the string that can possibly
       // match one of the cases above.
       if (this.openWakaBang.length >= 7) {