<li>Use the built-in library functions whenever possible.
For example, instead of writing this:
<pre>
- float x = 1.0 / sqrt(y);
+float x = 1.0 / sqrt(y);
</pre>
Write this:
<pre>
- float x = inversesqrt(y);
+float x = inversesqrt(y);
</pre>
</li>
</ul>