Merge sorter optimizations with this branch.

FossilOrigin-Name: 9bf1cfb4d99328bb95567330fdae76518f6386e2

diff --cc manifest
index d54c98795beb4f667e8a72a49fe59721d9ed2e62,a7a78bf354ace9c7e6070186927fbee3a7ed9f40..896a9a9a0a7780dd23803d919263d308175fbb28
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Merge\ssorter\soptimization\sinto\sthis\sbranch.
- D 2015-03-26T12:38:20.649
 -C Improve\sperformance\sof\smulti-field\ssorts\swhere\sthe\sfirst\sfield\shas\sa\slow\scardinality.
 -D 2015-03-30T12:06:26.995
++C Merge\ssorter\soptimizations\swith\sthis\sbranch.
++D 2015-03-30T15:45:45.183
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 88a3e6261286db378fdffa1124cad11b3c05f5bb
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -293,14 -293,14 +293,14 @@@ F src/update.c 250cefb96cfc7ca8f86f92ec
  F src/utf.c fc6b889ba0779b7722634cdeaa25f1930d93820c
  F src/util.c 98a7627ca48ad3265b6940915a1d08355eb3fc7e
  F src/vacuum.c 9460b9de7b2d4e34b0d374894aa6c8a0632be8ec
 -F src/vdbe.c bbfede5a8a6908b3ddcd55fdb0b2301288dd4754
 +F src/vdbe.c 5cb31321523c4723a70f965c996feedf89e24c1f
- F src/vdbe.h 6fc69d9c5e146302c56e163cb4b31d1ee64a18c3
+ F src/vdbe.h 7e538ecf47dccb307ea2d087c3ddc2dd8d70e79d
  F src/vdbeInt.h 9cbaa84f53ddd2d09a0cf61a94337a3a035d08a0
  F src/vdbeapi.c 583d56b129dd27f12bed518270de9ebe521e6a75
- F src/vdbeaux.c 413dc496248ac18eb0c19e35e86bb1ffd47b8907
+ F src/vdbeaux.c a20504ae52392459fa08402fda3f195f19d7c79d
  F src/vdbeblob.c 4f2e8e075d238392df98c5e03a64342465b03f90
  F src/vdbemem.c c0dc81285b7571b0a31c40f17846fe2397ec1cd9
- F src/vdbesort.c a8d82ed4b09f3b1f5390c7546a9bcad72d483abf
+ F src/vdbesort.c 7b3684665ea51d642b0e664fa4d0b0d08d61d80c
  F src/vdbetrace.c 7e4222955e07dd707a2f360c0eb73452be1cb010
  F src/vtab.c 62d49237bd8f3be4863815a39387b0f9897fa5e1
  F src/vxworks.h c18586c8edc1bddbc15c004fa16aeb1e1342b4fb
@@@ -1248,7 -1247,7 +1248,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 3ccd64eff7ded6d7e918baa3ba096a34d1298040 ce5ad17c25cf2f8274ce304c51e4421faae0b32b
- R f338ba24c380b02f996a7df267204c20
 -P b58191e91736b1d978db4127f22867dfe2302f7c
 -R ce44a3d54ad53a02b61fed80311cecef
++P aeb8e9a9f2092fda0c3e051f135e1d65cf77ff13 601e7b6b8e6bfabda03b70f75094c9014e3a3c49
++R ecee2ba850684cc6832777f6c1e18b7d
  U dan
- Z 8946dba9fbca0cd812ef66fb038505c1
 -Z 8753c6822202b0898d8492105ecdb751
++Z 755e374c8f5315221aeb3673026dbb0a

diff --cc manifest.uuid
index 7a9480414f644bd7056aa0c73ea5772ff57b037b,2a8f64fa3a4ef27f02d3943d48a38fdf3f889637..e0f7a9103da91bf2bcb6bff94f5a69cba4aebac2
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- aeb8e9a9f2092fda0c3e051f135e1d65cf77ff13
 -601e7b6b8e6bfabda03b70f75094c9014e3a3c49
++9bf1cfb4d99328bb95567330fdae76518f6386e2