From 46c4f4d50173988cdceab8411fc4548478ababfa Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Wed, 29 Jun 2022 09:48:47 +1000
Subject: [PATCH] Fix slow browser load in new backend

https://github.com/ankidroid/Anki-Android/pull/11644#issuecomment-1169380381

Closes #11733
---
 .../main/java/com/ichi2/libanki/CollectionV16.kt    | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/AnkiDroid/src/main/java/com/ichi2/libanki/CollectionV16.kt b/AnkiDroid/src/main/java/com/ichi2/libanki/CollectionV16.kt
index b627754326..dfb40f4e21 100644
--- a/AnkiDroid/src/main/java/com/ichi2/libanki/CollectionV16.kt
+++ b/AnkiDroid/src/main/java/com/ichi2/libanki/CollectionV16.kt
@@ -16,6 +16,7 @@
 package com.ichi2.libanki
 
 import android.content.Context
+import com.ichi2.async.CancelListener.Companion.isCancelled
 import com.ichi2.async.CollectionTask
 import com.ichi2.libanki.backend.*
 import com.ichi2.libanki.backend.model.toProtoBuf
@@ -93,11 +94,15 @@ class CollectionV16(
         return TemplateManager.TemplateRenderContext.from_existing_card(c, browser).render()
     }
 
+    @RustCleanup("drop the PartialSearch handling in the browse screen, which slows things down")
     override fun findCards(
         search: String,
         order: SortOrder,
         task: CollectionTask.PartialSearch?
     ): List<Long> {
+        if (task?.isCancelled() == true) {
+            return listOf()
+        }
         val adjustedOrder = if (order is SortOrder.UseCollectionOrdering) {
             @Suppress("DEPRECATION")
             SortOrder.BuiltinSortKind(
@@ -112,8 +117,12 @@ class CollectionV16(
         } catch (e: BackendInvalidInputException) {
             throw InvalidSearchException(e)
         }
-
-        task?.doProgress(cardIdsList)
+        for (id in cardIdsList) {
+            if (task?.isCancelled() == true) {
+                break
+            }
+            task?.doProgress(listOf(id))
+        }
         return cardIdsList
     }