From: drh <drh@noemail.net>
Date: Tue, 15 Nov 2016 02:46:39 +0000 (+0000)
Subject: Make the VACUUM command about 9% faster by avoiding unnecessary calls
X-Git-Tag: version-3.16.0~119
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c9b9deaee2bfdd535bc8779106e02ab12114b0d7;p=thirdparty%2Fsqlite.git

Make the VACUUM command about 9% faster by avoiding unnecessary calls
to sqlite3BtreeMovetoUnpacked() while copying rowid tables.

FossilOrigin-Name: 5ed0bd387699a0f3b477d4f3cfcb460a6a44cb84
---

diff --git a/manifest b/manifest
index 53f9f991eb..59906c5d78 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\s8794\snew\stest\scases\sreceived\sfrom\sthe\sOSS-FUZZ\sproject.
-D 2016-11-14T20:47:18.877
+C Make\sthe\sVACUUM\scommand\sabout\s9%\sfaster\sby\savoiding\sunnecessary\scalls\nto\ssqlite3BtreeMovetoUnpacked()\swhile\scopying\srowid\stables.
+D 2016-11-15T02:46:39.239
 F Makefile.in 6b572807415d3f0a379cebc9461416d8df4a12c8
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc bb4d970894abbbe0e88d00aac29bd52af8bc95f4
@@ -349,7 +349,7 @@ F src/hash.c 63d0ee752a3b92d4695b2b1f5259c4621b2cfebd
 F src/hash.h ab34c5c54a9e9de2e790b24349ba5aab3dbb4fd4
 F src/hwtime.h 747c1bbe9df21a92e9c50f3bbec1de841dc5e5da
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
-F src/insert.c d47f9b4f6b7137b886525f735628fed4ff181ea2
+F src/insert.c 0d6e59f9eea62db772eabc0f07901ec26fe01968
 F src/legacy.c 75d3023be8f0d2b99d60f905090341a03358c58e
 F src/loadext.c 5d6642d141c07d366e43d359e94ec9de47add41d
 F src/main.c 694ac90557abdaa62151a6090670e107b0f2c2ab
@@ -1534,7 +1534,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P c5dbc599b910c02a961675b12b273b8df6d29450
-R 16d589cbe0b8a973a94265be5011a399
+P 03f75a67c320f21192d721a8c34d49dea48ffdbb
+R 8e81a23a0b0c79dacc7554a88cc14173
 U drh
-Z 2897265fcdd3b169958c85551506b7bd
+Z deb6f2821ede2b99520e7ac64aa770e4
diff --git a/manifest.uuid b/manifest.uuid
index c9d695165a..8dcb1cf916 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-03f75a67c320f21192d721a8c34d49dea48ffdbb
\ No newline at end of file
+5ed0bd387699a0f3b477d4f3cfcb460a6a44cb84
\ No newline at end of file
diff --git a/src/insert.c b/src/insert.c
index 151c7d746b..f7c7bed540 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -2117,6 +2117,7 @@ static int xferOptimization(
     sqlite3VdbeJumpHere(v, addr1);
   }
   if( HasRowid(pSrc) ){
+    u8 insFlags;
     sqlite3OpenTable(pParse, iSrc, iDbSrc, pSrc, OP_OpenRead);
     emptySrcTest = sqlite3VdbeAddOp2(v, OP_Rewind, iSrc, 0); VdbeCoverage(v);
     if( pDest->iPKey>=0 ){
@@ -2133,9 +2134,16 @@ static int xferOptimization(
       assert( (pDest->tabFlags & TF_Autoincrement)==0 );
     }
     sqlite3VdbeAddOp2(v, OP_RowData, iSrc, regData);
+    if( db->flags & SQLITE_Vacuum ){
+      sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1);
+      insFlags = OPFLAG_NCHANGE|OPFLAG_LASTROWID|
+                           OPFLAG_APPEND|OPFLAG_USESEEKRESULT;
+    }else{
+      insFlags = OPFLAG_NCHANGE|OPFLAG_LASTROWID|OPFLAG_APPEND;
+    }
     sqlite3VdbeAddOp4(v, OP_Insert, iDest, regData, regRowid,
                       (char*)pDest, P4_TABLE);
-    sqlite3VdbeChangeP5(v, OPFLAG_NCHANGE|OPFLAG_LASTROWID|OPFLAG_APPEND);
+    sqlite3VdbeChangeP5(v, insFlags);
     sqlite3VdbeAddOp2(v, OP_Next, iSrc, addr1); VdbeCoverage(v);
     sqlite3VdbeAddOp2(v, OP_Close, iSrc, 0);
     sqlite3VdbeAddOp2(v, OP_Close, iDest, 0);