diff --git a/src/workflow/ArcanistBranchWorkflow.php b/src/workflow/ArcanistBranchWorkflow.php
index 3bb891b8..3394f14f 100644
--- a/src/workflow/ArcanistBranchWorkflow.php
+++ b/src/workflow/ArcanistBranchWorkflow.php
@@ -149,7 +149,7 @@ EOTEXT
 
     $branches = ipull($branches, null, 'name');
 
-    foreach (Futures($futures) as $name => $future) {
+    foreach (Futures($futures)->limit(16) as $name => $future) {
       list($info) = $future->resolvex();
       list($hash, $epoch, $tree, $desc, $text) = explode("\1", trim($info), 5);