what is the most efficient way to creating a dict with two lists?
<p>I have two lists like </p>

<pre><code>x = ['a', 'b', 'c', 'd'] and
y = [1, 2, 3, 4] 
</code></pre>

<p>I have to create a dict from these two lists so that result is</p>

<pre><code>{
 'a': 1,
 'b': 2,
 'c': 3,
 'd': 4
}
</code></pre>

<p>I do it using the following</p>

<pre><code>dict(zip(x, y))  
</code></pre>

<p>Is there a better and fast/efficient way of doing it?<br>
I have to perform this operation on [m, b]illion of times and on different lists </p>

<p>Thank you</p>
