class="computeroutput"><span class="keyword">operator</span><span class="special">*=</span></code>) tends to be more than an out-of-place
          <code class="computeroutput"><span class="keyword">operator</span><span class="special">*</span></code>
          (typically <code class="computeroutput"><span class="keyword">operator</span> <span class="special">*=</span></code>
          has to create a temporary workspace to carry out the multiplication, where
          as <code class="computeroutput"><span 