querystring: improve stringify() performance

PR-URL: https://github.com/nodejs/node/pull/33669
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 15 insertions, 9 deletions

diff --git a/lib/internal/querystring.js b/lib/internal/querystring.js
index 7df1c495c6e..ee589e19842 100644
--- a/lib/internal/querystring.js
+++ b/lib/internal/querystring.js
@@ -36,19 +36,25 @@ function encodeStr(str, noEscapeTable, hexTable) {
 
   let out = '';
   let lastPos = 0;
+  let i = 0;
 
-  for (let i = 0; i < len; i++) {
+  outer:
+  for (; i < len; i++) {
     let c = str.charCodeAt(i);
 
     // ASCII
-    if (c < 0x80) {
-      if (noEscapeTable[c] === 1)
-        continue;
-      if (lastPos < i)
-        out += str.slice(lastPos, i);
-      lastPos = i + 1;
-      out += hexTable[c];
-      continue;
+    while (c < 0x80) {
+      if (noEscapeTable[c] !== 1) {
+        if (lastPos < i)
+          out += str.slice(lastPos, i);
+        lastPos = i + 1;
+        out += hexTable[c];
+      }
+
+      if (++i === len)
+        break outer;
+
+      c = str.charCodeAt(i);
     }
 
     if (lastPos < i)