e.Lookup</code> functions, an unsafe API created for
debugging the memory allocator, have no replacement.
</p>

<p>
Before, <code>runtime.MemStats</code> was a global variable holding
statistics about memory allocation, and calls to <code>runtime.UpdateMemStats</code>
ensured that it was up to date.
In Go 1, <code>runtime.MemStats</code> is a struct type, and code should use
<a href="/pkg/runtime/#ReadMemStats"><code>runtime.ReadMemStats</code></a>
to obtain the current statistics.
</p>

<p>
The package add