Refactor the sqlite3VdbeRecordCompare() routine used to compare btree records.

Create a couple of fast-track routines to handle the common cases of a string
with BINARY collation or integer values as the left-most column.  This gives
a significant performance boost in common use.

FossilOrigin-Name: aec5473a750e412eb1e11e17bbafd760db086c86

diff --cc manifest
index 4cca5ef21aaba2ee2585c01c2a407d5b0c17a654,52a206ae83c3d64696806d8f3e608f26b4bd976f..36f6559f550aa88b1776e3206bd9536dde8413fd
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Change\san\sOP_SCopy\sinto\san\sOP_Copy\sin\sa\scase\swhere\sthe\sdestination\smight\sbe\nused\safter\sthe\ssource\shas\schanged.
- D 2014-03-03T17:36:39.940
 -C Fix\sa\scouple\sof\sharmless\scompiler\swarnings.
 -D 2014-03-03T21:46:55.799
++C Refactor\sthe\ssqlite3VdbeRecordCompare()\sroutine\sused\sto\scompare\sbtree\srecords.\nCreate\sa\scouple\sof\sfast-track\sroutines\sto\shandle\sthe\scommon\scases\sof\sa\sstring\nwith\sBINARY\scollation\sor\sinteger\svalues\sas\sthe\sleft-most\scolumn.\s\sThis\sgives\na\ssignificant\sperformance\sboost\sin\scommon\suse.
++D 2014-03-03T21:59:33.388
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1153,7 -1154,7 +1154,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
- P 559835e54e0715f2b4d207d056199a8268af739e
- R 0f407d04c62b2be5f5455aa20c5e914d
 -P 7c0b4381f0e6f33cb13299a915851d9431bf3850
++P c0fa0c0e2de50d7eda19ab8862496b18eff93538 fcf480cc630976b619aabd5f7fb7b09601a178fb
+ R 4042a62ac4c0618104f381105ba13add
++T +closed fcf480cc630976b619aabd5f7fb7b09601a178fb
  U drh
- Z c144dcb8dd86ca2b393613351986e190
 -Z 0037dd9417989b6d6f935caf436e0a2a
++Z f2b997d224dae00836e71263e0e4d70e

diff --cc manifest.uuid
index 097e35067a4b8ed661235619db20bbedc5f8d5eb,aaa189ba4bdfa74c45846bd26fa56ee14a0e581b..93e0969edd13268d6dda160c371400f15b00b4bb
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- c0fa0c0e2de50d7eda19ab8862496b18eff93538
 -fcf480cc630976b619aabd5f7fb7b09601a178fb
++aec5473a750e412eb1e11e17bbafd760db086c86