src: simplify loop arithmetic in `GetCPUInfo`

Cache the repeated operations and reuse; potentially generating
efficient code in some platforms, and improving readability.

PR-URL: https://github.com/nodejs/node/pull/26183
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/src/node_os.cc b/src/node_os.cc
index fa27b7bac51..1d3680a6322 100644
--- a/src/node_os.cc
+++ b/src/node_os.cc
@@ -120,15 +120,15 @@ static void GetCPUInfo(const FunctionCallbackInfo<Value>& args) {
   // The array is in the format
   // [model, speed, (5 entries of cpu_times), model2, speed2, ...]
   std::vector<Local<Value>> result(count * 7);
-  for (int i = 0; i < count; i++) {
+  for (int i = 0, j = 0; i < count; i++) {
     uv_cpu_info_t* ci = cpu_infos + i;
-    result[i * 7] = OneByteString(isolate, ci->model);
-    result[i * 7 + 1] = Number::New(isolate, ci->speed);
-    result[i * 7 + 2] = Number::New(isolate, ci->cpu_times.user);
-    result[i * 7 + 3] = Number::New(isolate, ci->cpu_times.nice);
-    result[i * 7 + 4] = Number::New(isolate, ci->cpu_times.sys);
-    result[i * 7 + 5] = Number::New(isolate, ci->cpu_times.idle);
-    result[i * 7 + 6] = Number::New(isolate, ci->cpu_times.irq);
+    result[j++] = OneByteString(isolate, ci->model);
+    result[j++] = Number::New(isolate, ci->speed);
+    result[j++] = Number::New(isolate, ci->cpu_times.user);
+    result[j++] = Number::New(isolate, ci->cpu_times.nice);
+    result[j++] = Number::New(isolate, ci->cpu_times.sys);
+    result[j++] = Number::New(isolate, ci->cpu_times.idle);
+    result[j++] = Number::New(isolate, ci->cpu_times.irq);
   }
 
   uv_free_cpu_info(cpu_infos, count);