In some cases this is true. In the case of setting and getting env vars, it is not. There is no comceivable reason for making a process that spends any signific

In some cases this is true. In the case of setting and getting env vars, it is not. There is no comceivable reason for making a process that spends any significant portion of its runtime calling setenv() or getenv(). Even if those calls were a thousand times slower than today, it would still be a non-issue.