title: Why does using a function namespace drastically increase overhead?
body: <p>Example:</p>
  <pre><code>time &lt;- Sys.time()
  total &lt;- 0
  for(i in 1:1e6) {
    total &lt;- total + stats::pnorm(i/1e6)
  }
  print(Sys.time() - time)
  </code></pre>
  <p>Time difference of 8.703019 secs</p>
  <pre><code>time &lt;- Sys.time()
  total &lt;- 0
  for(i in 1:1e6) {
    total &lt;- total + pnorm(i/1e6)
  }
  print(Sys.time() - time)
  </code></pre>
  <p>Time difference of 1.291625 secs</p>