From 24417ffb7f896971664053a13101154e40d6adce Mon Sep 17 00:00:00 2001
From: cel <cel@f/6sQ6d2CMxRUhLpspgGIulDxDCwYD7DzFzPNr7u5AU=.ed25519>
Date: Thu, 11 May 2017 20:25:59 -1000
Subject: Optimize streaming my channels

---
 lib/app.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/app.js b/lib/app.js
index f475bd2..6990aa5 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -283,6 +283,24 @@ App.prototype.streamChannels = function (opts) {
 }
 
 App.prototype.streamMyChannels = function (id, opts) {
+  // use ssb-query plugin if it is available, since it has an index for
+  // author + type
+  if (this.sbot.query) return pull(
+    this.sbot.query.read({
+      reverse: true,
+      query: [
+        {$filter: {
+          value: {
+            author: id,
+            content: {type: 'channel', subscribed: true}
+          }
+        }},
+        {$map: ['value', 'content', 'channel']}
+      ]
+    }),
+    pull.unique()
+  )
+
   return pull(
     this.sbot.createUserStream({id: id, reverse: true}),
     this.unboxMessages(),
-- 
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