benchmark: swap var for let in url benchmarks

In benchmark url directory this changes for loops using var to let
when it applies for consistency

PR-URL: https://github.com/nodejs/node/pull/28867
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js b/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
index f97961decf..cb2301e940 100644
--- a/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
+++ b/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
@@ -14,7 +14,7 @@ function useLegacy(n, input, prop) {
   const obj = querystring.parse(input);
   querystring.stringify(obj);
   bench.start();
-  for (var i = 0; i < n; i += 1) {
+  for (let i = 0; i < n; i += 1) {
     querystring.stringify(obj);
   }
   bench.end(n);
@@ -24,7 +24,7 @@ function useWHATWG(n, param, prop) {
   const obj = new URLSearchParams(param);
   obj.toString();
   bench.start();
-  for (var i = 0; i < n; i += 1) {
+  for (let i = 0; i < n; i += 1) {
     obj.toString();
   }
   bench.end(n);