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<p>Get total amount of used memory. </p>
<dl class="section return"><dt>Returns</dt><dd>Used heap space in bytes. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a632fb5550678e7d65db823fb1adc2dd9">&#9670;&nbsp;</a></span>init_heap()</h2>

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