fix(swingset): only mark refs for processing if refcount hits zero

This should remove some unnecessary work done by `processRefcounts` on objects which have lost one reference, but not all of them. refs #3106
Agoric · Jun 21, 2021 · 3354bbf · 3354bbf
1 parent dcfe169
commit 3354bbf
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/SwingSet/src/kernel/state/kernelKeeper.js b/packages/SwingSet/src/kernel/state/kernelKeeper.js
@@ -853,7 +853,9 @@ export default function makeKernelKeeper(kvStore, streamStore, kernelSlog) {
         reachable -= 1;
       }
       recognizable -= 1;
-      maybeFreeKrefs.add(kernelSlot);
+      if (!reachable || !recognizable) {
+        maybeFreeKrefs.add(kernelSlot);
+      }
       setObjectRefCount(kernelSlot, { reachable, recognizable });
     }