diff --git a/index.js b/index.js
index a33b37e..1f5253b 100644
--- a/index.js
+++ b/index.js
@@ -1,8 +1,8 @@
 import OpenAI from 'openai';
 
 const TTL_MS = 20 * 60 * 1000;
-const BATCH_MS = 60;
-const BATCH_BYTES = 2048;
+const BATCH_MS = 400;
+const BATCH_BYTES = 4096;
 // SNAPSHOT_MIN_MS is no longer needed as we removed throttled saving.
 
 // Heartbeat configuration: run every 4s while streaming to prevent eviction.