times faster, sometimes slower, rarely much slower than CPython. With Firefox, the table below shows how Brython performs compared to CPython (taking 100 as base for CPython)

<table class="perf">
<tr><td>assignment to int</td><td align="right">65</td>
<td>assignment to float</td><td align="right"> 195</td></tr>
<tr><td>augmented assignment</td><td align="right"> 70</td>
<td>build a dictionary</td><td align="right"> 422</td></tr>
<tr><td>add item to dict</td><td align="right"> 111</td>
<td>set dict item</td