benchmark: use let instead of var in timers

PR-URL: https://github.com/nodejs/node/pull/31794
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

7 files changed, 14 insertions, 16 deletions

diff --git a/benchmark/timers/immediate.js b/benchmark/timers/immediate.js
index d12106a0e0..3bd4c097dc 100644
--- a/benchmark/timers/immediate.js
+++ b/benchmark/timers/immediate.js
@@ -31,7 +31,7 @@ function main({ n, type }) {
 
 // setImmediate tail recursion, 0 arguments
 function depth(N) {
-  var n = 0;
+  let n = 0;
   bench.start();
   setImmediate(cb);
   function cb() {
@@ -45,7 +45,7 @@ function depth(N) {
 
 // setImmediate tail recursion, 1 argument
 function depth1(N) {
-  var n = 0;
+  let n = 0;
   bench.start();
   setImmediate(cb, 1);
   function cb(a1) {
@@ -59,7 +59,7 @@ function depth1(N) {
 
 // Concurrent setImmediate, 0 arguments
 function breadth(N) {
-  var n = 0;
+  let n = 0;
   bench.start();
   function cb() {
     n++;
@@ -73,7 +73,7 @@ function breadth(N) {
 
 // Concurrent setImmediate, 1 argument
 function breadth1(N) {
-  var n = 0;
+  let n = 0;
   bench.start();
   function cb(a1) {
     n++;
@@ -88,7 +88,7 @@ function breadth1(N) {
 // Concurrent setImmediate, 4 arguments
 function breadth4(N) {
   N /= 2;
-  var n = 0;
+  let n = 0;
   bench.start();
   function cb(a1, a2, a3, a4) {
     n++;
diff --git a/benchmark/timers/timers-breadth-args.js b/benchmark/timers/timers-breadth-args.js
index 63a301dc9b..bf1727ab86 100644
--- a/benchmark/timers/timers-breadth-args.js
+++ b/benchmark/timers/timers-breadth-args.js
@@ -6,7 +6,7 @@ const bench = common.createBenchmark(main, {
 });
 
 function main({ n }) {
-  var j = 0;
+  let j = 0;
   function cb1(arg1) {
     j++;
     if (j === n)
diff --git a/benchmark/timers/timers-breadth.js b/benchmark/timers/timers-breadth.js
index 78bd5a97ae..7af5d38001 100644
--- a/benchmark/timers/timers-breadth.js
+++ b/benchmark/timers/timers-breadth.js
@@ -6,7 +6,7 @@ const bench = common.createBenchmark(main, {
 });
 
 function main({ n }) {
-  var j = 0;
+  let j = 0;
   bench.start();
   function cb() {
     j++;
diff --git a/benchmark/timers/timers-cancel-pooled.js b/benchmark/timers/timers-cancel-pooled.js
index 5045983210..30dbd7bc00 100644
--- a/benchmark/timers/timers-cancel-pooled.js
+++ b/benchmark/timers/timers-cancel-pooled.js
@@ -8,11 +8,11 @@ const bench = common.createBenchmark(main, {
 
 function main({ n }) {
 
-  var timer = setTimeout(() => {}, 1);
+  let timer = setTimeout(() => {}, 1);
   for (let i = 0; i < n; i++) {
     setTimeout(cb, 1);
   }
-  var next = timer._idlePrev;
+  let next = timer._idlePrev;
   clearTimeout(timer);
 
   bench.start();
diff --git a/benchmark/timers/timers-cancel-unpooled.js b/benchmark/timers/timers-cancel-unpooled.js
index df203ee481..70f8fd96c9 100644
--- a/benchmark/timers/timers-cancel-unpooled.js
+++ b/benchmark/timers/timers-cancel-unpooled.js
@@ -14,14 +14,13 @@ function main({ n, direction }) {
     timersList.push(setTimeout(cb, i + 1));
   }
 
-  var j;
   bench.start();
   if (direction === 'start') {
-    for (j = 0; j < n; j++) {
+    for (let j = 0; j < n; j++) {
       clearTimeout(timersList[j]);
     }
   } else {
-    for (j = n - 1; j >= 0; j--) {
+    for (let j = n - 1; j >= 0; j--) {
       clearTimeout(timersList[j]);
     }
   }
diff --git a/benchmark/timers/timers-depth.js b/benchmark/timers/timers-depth.js
index bfc6dd02cf..766733ba18 100644
--- a/benchmark/timers/timers-depth.js
+++ b/benchmark/timers/timers-depth.js
@@ -6,7 +6,7 @@ const bench = common.createBenchmark(main, {
 });
 
 function main({ n }) {
-  var i = 0;
+  let i = 0;
   bench.start();
   setTimeout(cb, 1);
   function cb() {
diff --git a/benchmark/timers/timers-insert-unpooled.js b/benchmark/timers/timers-insert-unpooled.js
index 11d25d5fe7..5ee255b5e1 100644
--- a/benchmark/timers/timers-insert-unpooled.js
+++ b/benchmark/timers/timers-insert-unpooled.js
@@ -10,14 +10,13 @@ const bench = common.createBenchmark(main, {
 function main({ direction, n }) {
   const timersList = [];
 
-  var i;
   bench.start();
   if (direction === 'start') {
-    for (i = 1; i <= n; i++) {
+    for (let i = 1; i <= n; i++) {
       timersList.push(setTimeout(cb, i));
     }
   } else {
-    for (i = n; i > 0; i--) {
+    for (let i = n; i > 0; i--) {
       timersList.push(setTimeout(cb, i));
     }
   }