As of Go 1.5 (1.6, released last week, makes further improvements):<p>&gt; The &quot;stop the world&quot; phase of the collector will almost always be under 10 milliseconds and usually much less.<p><a href="https:&#x2F;&#x2F;golang.org&#x2F;doc&#x2F;go1.5" rel="nofollow">https:&#x2F;&#x2F;golang.org&#x2F;doc&#x2F;go1.5</a>