Prefetch children of node being checked for cycles, in case graph implementation caches batched results.

--
MOS_MIGRATED_REVID=101961270

1 files changed, 3 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java b/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
index 2a5a8c8f05..6ddd647a14 100644
--- a/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
+++ b/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
@@ -1505,10 +1505,12 @@ public final class ParallelEvaluator implements Evaluator {
       }
 
       // This node is not yet known to be in a cycle. So process its children.
-      Iterable<? extends SkyKey> children = entry.getTemporaryDirectDeps();
+      Iterable<SkyKey> children = entry.getTemporaryDirectDeps();
       if (Iterables.isEmpty(children)) {
         continue;
       }
+      // Prefetch all children, in case our graph performs better with a primed cache.
+      graph.getBatch(children);
 
       // This marker flag will tell us when all this node's children have been processed.
       toVisit.push(CHILDREN_FINISHED);