Performance improvements for fts5, particularly detail=col mode.

FossilOrigin-Name: a3d7b8ac53f94d29a11362f193fd1967f30583df

diff --cc manifest
index 623ea5d1548b2409c576aa8cbb98af9b9f4a6c9e,173bd3a03a7e9d386e3c1d4ab9214907978ec1de..a5a0c52194bf641cba0c6c4dbd8fe0833d74502a
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,8 -1,8 +1,8 @@@
- C Fix\sissues\son\sunix\swith\sopening\sdatabase\sfiles\svia\ssymlinks\sthat\sare\snot\sin\sthe\scurrent\sworking\sdirectory.\sAnd\swith\snested\ssymlinks.
- D 2016-01-26T14:48:02.511
 -C Further\sminor\sperformance\simprovements\sand\scode-size\sreductions\srelated\sto\sfts5\scolumn\sfilters\son\sdetail=col\stables.
 -D 2016-01-26T20:08:50.348
++C Performance\simprovements\sfor\sfts5,\sparticularly\sdetail=col\smode.
++D 2016-01-26T20:19:55.225
  F Makefile.in 027c1603f255390c43a426671055a31c0a65fdb4
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 -F Makefile.msc 1708a78eda223b6daa302b140037fcc214a779f9
 +F Makefile.msc 6fca5455aaecbd14479f33f091aa19df2d3d2969
  F README.md 8ecc12493ff9f820cdea6520a9016001cb2e59b7
  F VERSION 866588d1edf0ccb5b0d33896974338f97564f719
  F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
@@@ -1421,8 -1420,7 +1422,7 @@@ F tool/vdbe_profile.tcl 246d0da094856d7
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P abd2b357c55fdcdbc8e66a81a3fbb7f822ea0a4f 4a4385564dd3887a7953820b60c99d6ce289f96a
- R 1d2d15b294b146d0b5d200f0cf62495d
- T +closed 4a4385564dd3887a7953820b60c99d6ce289f96a
 -P 249a2d070c34bf884a04cb248b9691e239f2871c
 -R a28f5f4bedd812396ab85ff0aefd35c4
++P 4003db4a49c6b623750e56f626fa492c8402067f b4ac61aeee976296e7719949cd4fb496147a29e8
++R 3b6b6d60ef77e3cea10b7a0c2c39f1b3
  U dan
- Z 7fd087e8bb59761ded2cdf6adb6cd578
 -Z 56fb7a3fddaab518f0c4eb551a124662
++Z 0416f9e7e1e3c46e17637bea5d350927

diff --cc manifest.uuid
index bbd6a658df02bf42a044c002fd8c5984cd79cdaf,708359e9ec83f4dc893b7ece2f603df62059bf60..915fae58aec33596201c00599a6480ab59743fea
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 4003db4a49c6b623750e56f626fa492c8402067f
 -b4ac61aeee976296e7719949cd4fb496147a29e8
++a3d7b8ac53f94d29a11362f193fd1967f30583df