Allow the sorter to begin returning data to the VDBE as soon as it is available,...

FossilOrigin-Name: cb0ab20c48962cdee03115efa93d7d501780ac73

diff --cc manifest
index 2eb2b1da22d25d563bf99262f242479e0bc76880,08cf12e6219f946bf40b8795f31db716e1a9cb85..f04882a0e81e8e3cdee9140ff35e5cb9b88cce97
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sharmless\scompiler\swarnings.
- D 2014-04-04T22:44:59.018
 -C Improve\sperformance\sin\ssingle-threaded\smode\sby\shaving\sthe\sfinal\smerge\spass\skeys\sdirectly\sto\sthe\sVDBE,\sinstead\sof\sgoing\svia\sa\sfinal\sPMA.
 -D 2014-04-14T18:41:21.894
++C Allow\sthe\ssorter\sto\sbegin\sreturning\sdata\sto\sthe\sVDBE\sas\ssoon\sas\sit\sis\savailable,\sinstead\sof\swaiting\suntil\sall\skeys\shave\sbeen\ssorted.
++D 2014-04-14T19:23:18.139
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in ad0921c4b2780d01868cf69b419a4f102308d125
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1163,7 -1163,7 +1163,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
- P 5e3dfa27c71a666e122e3cf64897038ff8424800
- R bbcde0d30a2bb025a3c15f4a10b2b404
- U drh
- Z 9376e61a8443d421f4f6f69d3d5500ac
 -P e400bbbf26cdfe88f6cb231e96cdcddb9a6bcc0f
++P e54dded2012f0ab486ee138e9bd57c528af33980 02610cd9b77caa2c181210056088beb3ad6ce30f
+ R b74f7a073d8c77e32a2dce332520aa10
+ U dan
 -Z cd43207b847b4088208c6c3dd9c99bf8
++Z ebd968da8bc859eb7bfdd863767ac91c

diff --cc manifest.uuid
index 44109c73580015fdc519d35b67623f341b36e475,0cd782fad35b2a7db0f4219f31503b4024e8ae4f..1714edb86bf3e80c67505c24fec3eca1a24e2331
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- e54dded2012f0ab486ee138e9bd57c528af33980
 -02610cd9b77caa2c181210056088beb3ad6ce30f
++cb0ab20c48962cdee03115efa93d7d501780ac73