buffer: cache Environment::GetCurrent to avoid repeated calls

PR-URL: #59043
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: theanarkh <theratliter@gmail.com>
Reviewed-By: Dario Piotrowicz <dario.piotrowicz@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>

Author: mertcanaltin

src/node_buffer.cc

@@ -1061,8 +1061,9 @@ void IndexOfBuffer(const FunctionCallbackInfo<Value>& args) {
 
   enum encoding enc = static_cast<enum encoding>(args[3].As<Int32>()->Value());
 
-  THROW_AND_RETURN_UNLESS_BUFFER(Environment::GetCurrent(args), args[0]);
-  THROW_AND_RETURN_UNLESS_BUFFER(Environment::GetCurrent(args), args[1]);
+  Environment* env = Environment::GetCurrent(args);
+  THROW_AND_RETURN_UNLESS_BUFFER(env, args[0]);
+  THROW_AND_RETURN_UNLESS_BUFFER(env, args[1]);
   ArrayBufferViewContents<char> haystack_contents(args[0]);
   ArrayBufferViewContents<char> needle_contents(args[1]);
   int64_t offset_i64 = args[2].As<Integer>()->Value();