StreamSelectLoop was treating seconds as microseconds, outward behavior was correct but internally many short sleeps/select calls were being made.

jmalloc · jmalloc · commit 3d4b90f9d4ad · 2014-01-30T10:19:28.000+10:00
diff --git a/StreamSelectLoop.php b/StreamSelectLoop.php
@@ -13,6 +13,8 @@
  */
 class StreamSelectLoop implements LoopInterface
 {
+    const MICROSECONDS_PER_SECOND = 1000000;
+
     private $nextTickQueue;
     private $futureTickQueue;
     private $timers;
@@ -193,7 +195,7 @@ public function run()
                 break;
             }
 
-            $this->waitForStreamActivity($timeout);
+            $this->waitForStreamActivity($timeout * self::MICROSECONDS_PER_SECOND);
         }
     }
 

Original file line number	Diff line number	Diff line change
`@@ -13,6 +13,8 @@`
`13`	`13`	`*/`
`14`	`14`	`class StreamSelectLoop implements LoopInterface`
`15`	`15`	`{`
	`16`	`+ const MICROSECONDS_PER_SECOND = 1000000;`
	`17`	`+`
`16`	`18`	`private $nextTickQueue;`
`17`	`19`	`private $futureTickQueue;`
`18`	`20`	`private $timers;`
`@@ -193,7 +195,7 @@ public function run()`
`193`	`195`	`break;`
`194`	`196`	`}`
`195`	`197`
`196`		`- $this->waitForStreamActivity($timeout);`
	`198`	`+ $this->waitForStreamActivity($timeout * self::MICROSECONDS_PER_SECOND);`
`197`	`199`	`}`
`198`	`200`	`}`
`199`	`201`