diff --git a/keyserver/src/scripts/test-threadstore-reductions.js b/keyserver/src/scripts/test-threadstore-reductions.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/scripts/test-threadstore-reductions.js
@@ -0,0 +1,20 @@
+// @flow
+
+import ashoat from 'lib/facts/ashoat.js';
+
+import { main } from './utils.js';
+import { fetchThreadInfos } from '../fetchers/thread-fetchers.js';
+import { createScriptViewer } from '../session/scripts.js';
+
+const viewer = createScriptViewer(ashoat.id);
+
+async function testThreadStoreReductions() {
+  const { threadInfos } = await fetchThreadInfos(viewer);
+  const beforeReductions = JSON.stringify(threadInfos);
+  const beforeBytes = new Blob([beforeReductions]).size;
+  console.log(
+    `before reductions, Ashoat's ThreadStore is ${beforeBytes} bytes large`,
+  );
+}
+
+main([testThreadStoreReductions]);