diff --git a/app/imports/api/engine/computation/writeComputation/writeScope.js b/app/imports/api/engine/computation/writeComputation/writeScope.js
index 18d93373..a25e9ba0 100644
--- a/app/imports/api/engine/computation/writeComputation/writeScope.js
+++ b/app/imports/api/engine/computation/writeComputation/writeScope.js
@@ -62,3 +62,13 @@ export default function writeScope(creatureId, computation) {
     Creatures.update({ _id: creatureId }, { $unset: { dirty: 1 } });
   }
 }
+/*
+function calculateSize(computation) {
+  const sizeEstimator = {
+    creature: computation.creature,
+    variables: computation.variables,
+    props: computation.originalPropsById,
+  };
+  return MongoInternals.NpmModule.BSON.calculateObjectSize(sizeEstimator, { checkKeys: false })
+}
+*/
diff --git a/app/imports/api/engine/computeCreature.js b/app/imports/api/engine/computeCreature.js
index d0a3d469..b6dba147 100644
--- a/app/imports/api/engine/computeCreature.js
+++ b/app/imports/api/engine/computeCreature.js
@@ -4,7 +4,7 @@ import writeAlteredProperties from './computation/writeComputation/writeAlteredP
 import writeScope from './computation/writeComputation/writeScope.js';
 import writeErrors from './computation/writeComputation/writeErrors.js';
 
-export default function computeCreature(creatureId){
+export default function computeCreature(creatureId) {
   if (Meteor.isClient) return;
   // console.log('compute ' + creatureId);
   const computation = buildCreatureComputation(creatureId);
@@ -16,7 +16,7 @@ function computeComputation(computation, creatureId) {
     computeCreatureComputation(computation);
     writeAlteredProperties(computation);
     writeScope(creatureId, computation);
-  } catch (e){
+  } catch (e) {
     const errorText = e.reason || e.message || e.toString();
     computation.errors.push({
       type: 'crash',
@@ -32,6 +32,19 @@ function computeComputation(computation, creatureId) {
     console.error(logError);
     throw e;
   } finally {
+    checkPropertyCount(computation)
     writeErrors(creatureId, computation.errors);
   }
 }
+
+const MAX_PROPS = 1000;
+function checkPropertyCount(computation) {
+  const count = computation.props.length;
+  if (count <= MAX_PROPS) return;
+  computation.errors.push({
+    type: 'warning',
+    details: {
+      error: `This character sheet has too many properties and may perform poorly ( ${count} / ${MAX_PROPS} )`
+    },
+  });
+}
diff --git a/app/imports/client/ui/creature/character/errors/CharacterErrors.vue b/app/imports/client/ui/creature/character/errors/CharacterErrors.vue
index 130144f3..5c2452da 100644
--- a/app/imports/client/ui/creature/character/errors/CharacterErrors.vue
+++ b/app/imports/client/ui/creature/character/errors/CharacterErrors.vue
@@ -34,6 +34,16 @@
             :key="index + 'dependencyLoopError'"
             :model="error"
           />
+          <v-alert
+            v-else-if="error.type === 'warning'"
+            :key="index + 'otherError'"
+            border="bottom"
+            colored-border
+            elevation="2"
+            type="warning"
+          >
+            {{ error.details.error }}
+          </v-alert>
           <v-alert
             v-else
             :key="index + 'otherError'"