From 3e394f14e84a2d8d34e9ff89ab714792b663d352 Mon Sep 17 00:00:00 2001
From: link2xt <link2xt@testrun.org>
Date: Mon, 3 Jan 2022 23:03:54 +0000
Subject: [PATCH] sql: disable `cipher_memory_security` SQLCipher PRAGMA

It slows down dc_get_chat_msgs() from ~50ms to seconds on Android. It
is disabled by default in SQLCipher 4.5.0, but currently SQLCipher 4.4.3
is bundled so this PRAGMA has to be disabled manually.
---
 src/sql.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sql.rs b/src/sql.rs
index 15f72cf28..a83945cac 100644
--- a/src/sql.rs
+++ b/src/sql.rs
@@ -84,7 +84,8 @@ impl Sql {
             .with_flags(open_flags)
             .with_init(|c| {
                 c.execute_batch(&format!(
-                    "PRAGMA secure_delete=on;
+                    "PRAGMA cipher_memory_security = OFF; -- Too slow on Android
+                     PRAGMA secure_delete=on;
                      PRAGMA busy_timeout = {};
                      PRAGMA temp_store=memory; -- Avoid SQLITE_IOERR_GETTEMPPATH errors on Android
                      ",