Merge the latest performance enhancements and fixes from trunk.

FossilOrigin-Name: be71d1e24c9cbfbfa60df8159571929d85b1f281e32e6230b044c952eae91a92

diff --cc manifest
index 43ddb5e2040c6235a934f0deb9f6071ff30e18c0,b85d244af4ab316e6fcb14eb04e6d8f51cfec7f7..61aaf701f30c34731e552eb8ac5bbaa8c3b81412
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,8 -1,8 +1,8 @@@
- C Merge\sthe\sfix\sfor\sticket\s[4e8e4857d32d401f],\sso\sthat\sthis\sbranch\snow\scontains\nrelease\s3.27.1\splus\sthe\sextra\spatch\sto\spreserve\sROWID\svalues\son\sVACUUM.
- D 2019-02-08T14:59:03.003
 -C When\san\sIN\soperator\sdrives\sa\squery\sloop,\smark\sit\sas\s"CODED"\sso\sthat\sit\nwill\snot\sbe\sused\safterwards\sfor\sa\s(pointless)\smembership\stest.\s\sThis\sis\na\sbetter\sfix\sfor\sticket\s[df46dfb631f75694]\sthan\sthe\sprevious\sfix\sthat\sis\nnow\son\sa\sbranch\sas\sit\spreserves\sthe\sfull\soptimization\sof\ncheck-in\s[e130319317e76119].
 -D 2019-02-20T12:52:47.452
++C Merge\sthe\slatest\sperformance\senhancements\sand\sfixes\sfrom\strunk.
++D 2019-02-20T13:23:13.275
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 -F Makefile.in 178d8eb6840771149cee40b322d1b3be30d330198c522c903c1b66fb5a1bfca4
 +F Makefile.in bed1d9a38624814252fa3183bb6f654f285c64ac2a629784e626ab3f77c06485
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 5df60c70edb157feb2148a14c687551969599bd065875a0b959b6b139721ca72
  F README.md 377233394b905d3b2e2b33741289e093bc93f2e7adbe00923b2c5958c9a9edee
@@@ -458,10 -456,10 +459,10 @@@ F src/auth.c 0fac71038875693a937e506bce
  F src/backup.c 78d3cecfbe28230a3a9a1793e2ead609f469be43e8f486ca996006be551857ab
  F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
  F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
- F src/btree.c 1ceb21b660c011749efd970549f3f2f208b2ae04de36a69be9879d53d9755857
 -F src/btree.c 026f48c39b179a5602423904fcaaae87bbd75f659fd672b3756fea43356d9909
++F src/btree.c 00e3e1b6cff255bef38b065225b00ff08626e1ed19a88eb52a2b5d6c28d5ebd8
  F src/btree.h 63b94fb38ce571c15eb6a3661815561b501d23d5948b2d1e951fbd7a2d04e8d3
- F src/btreeInt.h 4d7549276814953d08aa5b86cc9f03e41cdd9b6666cac33324af33e262277906
- F src/build.c 906ca6663b9dcd413e72ae9c44dd51e596d8336b04d52e678a7501e71c20cab2
 -F src/btreeInt.h 6111c15868b90669f79081039d19e7ea8674013f907710baa3c814dc3f8bfd3f
++F src/btreeInt.h d3250a991da485bf4a1b607ad7d7db0c28c1ef9ddf0e716ea60e061c7d6c30b6
+ F src/build.c ac41c86b486f480b2bcad7e55c6cc19d7151082f74682ab048c45980d6c9ddac
  F src/callback.c 25dda5e1c2334a367b94a64077b1d06b2553369f616261ca6783c48bcb6bda73
  F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
  F src/ctime.c 109e58d00f62e8e71ee1eb5944ac18b90171c928ab2e082e058056e1137cc20b
@@@ -478,11 -476,11 +479,11 @@@ F src/hash.c a12580e143f10301ed5166ea49
  F src/hash.h ab34c5c54a9e9de2e790b24349ba5aab3dbb4fd4
  F src/hwtime.h 747c1bbe9df21a92e9c50f3bbec1de841dc5e5da
  F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
- F src/insert.c 4cf069988908f650bec92fd821a082f6eda87c01191047e49a1a5007af93274c
+ F src/insert.c 305f6ea82a90c3d506ad26d3b6530655bcf08dbff20403ce9f20c21758fbd5c0
 -F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 +F src/legacy.c f69590f141eabd2dc787710264ccfa4374fac991ea1ca2120a2550c0ffe32afd
  F src/loadext.c e6f10875d52aca3b7e57ce1ec174aeafc9b6c00b43000cd30d791f9cb490b7a6
 -F src/main.c 27d7265625ea6eaccdfe7c53ef41adc179c9357a077702a860c1a3b0a037a16f
 +F src/main.c 610db224c80056d76e4aa9441a3d546e90ca2206789c6bb125468c8e78b79db1
- F src/malloc.c 07295435093ce354c6d9063ac05a2eeae28bd251d2e63c48b3d67c12c76f7e18
+ F src/malloc.c 0f9da2a66b230a5785af94b9672126845099b57b70a32c987d04ac28c69da990
  F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
  F src/mem1.c c12a42539b1ba105e3707d0e628ad70e611040d8f5e38cf942cee30c867083de
  F src/mem2.c f1940d9e91948dd6a908fbb9ce3835c36b5d83c3
@@@ -501,29 -499,28 +502,29 @@@ F src/os.c 4c1e6111a933d8167f4b4f38d3b3
  F src/os.h 48388821692e87da174ea198bf96b1b2d9d83be5dfc908f673ee21fafbe0d432
  F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
  F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
 -F src/os_unix.c f6e91b8fd82af7afbfd073c4974ad6cdb8e62d9f65ceddb45167835a0567fdc0
 -F src/os_win.c 85d9e532d0444ab6c16d7431490c2e279e282aa0917b0e988996b1ae0de5c5a0
 +F src/os_unix.c 21faa3e6e4183c48756a8dab6f8f6d017b24e636c3266ebc3a973b64cc00734a
 +F src/os_win.c 340cb5909334c4ba748987dff2510498e3885bb24c2d9c7632794ed31279f0b5
  F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
- F src/pager.c 93757b9cc236e24c965468f33fc5d7d0895a72623393fb1c68674974fa407b32
 -F src/pager.c 38022624ac9fba1f601d3068d7c393fcc909727fccab556242c93d9c7897b640
 -F src/pager.h 217921e81eb5fe455caa5cda96061959706bcdd29ddb57166198645ef7822ac3
++F src/pager.c 62f5a8fb312e65f4ac8664638f4cce52deb8e6bfb9337ea8c5b5dcb6eead47ed
 +F src/pager.h 0acf77fd717a46c304f52405e19a550101a9efda29154af00d34eedcb7f1d50b
  F src/parse.y 741a270b7f2f85bc5d026d06fb5a9ccba5335304ff2831e1cb44b36cd0da6006
  F src/pcache.c 696a01f1a6370c1b50a09c15972bc3bee3333f8fcd1f2da8e9a76b1b062c59ee
  F src/pcache.h 4f87acd914cef5016fae3030343540d75f5b85a1877eed1a2a19b9f284248586
 -F src/pcache1.c a72804486dfa8e4b6bc30d666c97ecf1155f91a4351fc6e48ea4097e4eb304fb
 -F src/pragma.c af67dedaad8bafe9a5f9adcec32a0da6dd118617dd8220ad1d118f5a6bf83a02
 +F src/pcache1.c 8035ab76e766c7b3dca88f568590c87e474aeddb2d07ef2598f4c5088093d609
 +F src/pragma.c a6ad736f960ab2bba79ce96c5d5a2f8f2e841258900d6a436565c14839f0fc08
  F src/pragma.h a776bb9c915207e9d1117b5754743ddf1bf6a39cc092a4a44e74e6cb5fab1177
 -F src/prepare.c 78027c6231fbb19ca186a5f5f0c0a1375d9c2cec0655273f9bd90d9ff74a34b3
 +F src/prepare.c 58a6ad1d4abf266f2ee6aa4fc35960459340f01a6b5dd9a2bb25a7c3c6c86f98
  F src/printf.c cbf27c320091a83279d1738f68a27a9fe01698c607ce80516ab6bdb5a9c36a1a
  F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
- F src/resolve.c c8f207247472c41ac73d738e1c1a80719ad253d1dbb617ed57740492b2a6c097
+ F src/resolve.c 1588690ee4cc39b4b9ea3230d4e3543d5ec3b5e898c87521f1375af0f1934cd4
  F src/rowset.c d977b011993aaea002cab3e0bb2ce50cf346000dff94e944d547b989f4b1fe93
  F src/select.c c998f694759e37799929e28df8a2649747f8774d4fc233529ab6bda689388e15
  F src/shell.c.in f2c1adbee3f6f36686b4a38d2168ebfc25298b4ad1e6d95199fc4e95b539251d
 -F src/sqlite.h.in 7da74fd5bd7a9dbe92297060f036935520b26e240457287c5e67c7b9db51a986
 +F src/sqlite.h.in 23bb18f6bd9e96fa062f52b4fb497bbd7871fa19801d035cb0b79b7d1c1c792b
  F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 +F src/sqlite3_private.h aee73ebaea1963e528b61408c01ba82f49fdf3dca9cbe940f3b0f3d9cec25942
  F src/sqlite3ext.h 960f1b86c3610fa23cb6a267572a97dcf286e77aa0dd3b9b23292ffaa1ea8683
- F src/sqliteInt.h c85e80d38406614b6de7f4afe5856c8cb3126b14b5ac95fcffe51bdf6c4464d9
 -F src/sqliteInt.h 8628c582eafa5ca93523cdaa7c45b2f38a11132e419c7923850706da7fa36bc2
++F src/sqliteInt.h 72331eb450348571c4256046e0684eff2a17eb63b60437e1366068b340a620a3
  F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
  F src/status.c 46e7aec11f79dad50965a5ca5fa9de009f7d6bde08be2156f1538a0a296d4d0e
  F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@@ -589,13 -586,13 +590,13 @@@ F src/upsert.c 0dd81b40206841814d46942a
  F src/utf.c 810fbfebe12359f10bc2a011520a6e10879ab2a163bcb26c74768eab82ea62a5
  F src/util.c 82a2e3f691a3b654be872e305dab1f455e565dedf5e6a90c818c1ab307c00432
  F src/vacuum.c a9f389f41556c0ec310bc9169dc9476603c30a0a913ad92bfbc75c86886967ca
- F src/vdbe.c 1e83f44813acafd9e0da81861773261431e673246233b8e6775c24c437ffa513
 -F src/vdbe.c c67c8c46bea825421ee97511328fe1405537b586cbbe4db06e17c4ac5ab4dbed
++F src/vdbe.c 2a2b4cf406ed5b2fc00d17ce53a20000386bda99dd883a5dbc3f1fe025881498
  F src/vdbe.h 712bca562eaed1c25506b9faf9680bdc75fc42e2f4a1cd518d883fa79c7a4237
  F src/vdbeInt.h a76d5eed62c76bcd8de7afd3147fac1bc40c5a870582664bcd7d071ef437c37f
 -F src/vdbeapi.c 57a2d794a8833f269b878dbc24e955369bdb379af6c4e93ebc5ce1a20fa3daf4
 +F src/vdbeapi.c 68480f890f0d4673e7d790178911efdd3ac69517c82bdc5ba3b7922816430080
  F src/vdbeaux.c 4fa28b32452f6197dba7c8780dde11576b9a6d8ce6f35adbb69efc3e7d37fa0c
  F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
- F src/vdbemem.c 3173f0275cf8643a03ed02084ee56b97fc1a17a2edb5907facec504f59c3172d
+ F src/vdbemem.c 3e89e087df928eba80e520824078dc563c579a0848b1557ac36845ec14392923
  F src/vdbesort.c 90aad5a92608f2dd771c96749beabdb562c9d881131a860a7a5bccf66dc3be7f
  F src/vdbetrace.c 79d6dbbc479267b255a7de8080eee6e729928a0ef93ed9b0bfa5618875b48392
  F src/vtab.c 2462b7d6fd72b0b916477f5ef210ee49ab58cec195483ebdac0c8c5e3ec42cab
@@@ -605,10 -602,10 +606,10 @@@ F src/wal.h bc4bdd9ee970c9d62197fa4139d
  F src/walker.c 7607f1a68130c028255d8d56094ea602fc402c79e1e35a46e6282849d90d5fe4
  F src/where.c 8a207cb2ca6b99e1edb1e4bbff9b0504385a759cbf66180d1deb34d80ca4b799
  F src/whereInt.h 5f14db426ca46a83eabab1ae9aa6d4b8f27504ad35b64c290916289b1ddb2e88
- F src/wherecode.c a571d8d7c19d6db786a201f2df8788b320fefcb2842f2a1eb9a85b85e91bc35f
+ F src/wherecode.c 5ee878f714218352a2f452907572d4bf1e4303393288458f87ffc86edaf2cfbe
  F src/whereexpr.c 36b47f7261d6b6f1a72d774c113b74beddf6745aba1018e64b196e29db233442
  F src/window.c df2456386e0b1553a8d1fcf3a0ddc4c058fe2c650ea8c74b6bf8862082ddafc9
 -F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 +F test/8_3_names.test 05034aadccd2253ffe6cbefb06662b8aa4600f77
  F test/affinity2.test a6d901b436328bd67a79b41bb0ac2663918fe3bd
  F test/affinity3.test 6a101af2fc945ce2912f6fe54dd646018551710d
  F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
@@@ -1809,7 -1805,7 +1810,7 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P c9af2f71bf1bc92a006d9053b0107a529b45e5a0b7f6e442a8e4db96678b53ac 440a7cda000164d3b46109caf2e1dde80681ba9b0d94ba9be6847d2b917445cf
- R 304275eb3d19975b85a3c6a610a37ae0
 -P f16d127c3b4a735afae1fc236bcf90f31adff079c7d3a896f901d908ff8b8532
 -R 305348511782a1081a30b2475753ee53
++P 0cdae60ed7920f29e4a092c07d0aab7a33db16e7d308fb5b0becb6bbe57e49ff fa792714ae62fa980f1767acc6d622a6727ceb677870243c88548423795dcb5b
++R e87705bf1b12227d70e85962a6b277f3
  U drh
- Z a9625b12eb3769ecaeda45c7fe16bf9a
 -Z ef9d1f96fc42c68bd56fd0d4769bee0b
++Z 59fd324922781ff141a18ee2001496d0

diff --cc manifest.uuid
index 0dc88ed5719328018399a7d9a58459c0d951490e,a0b2fe474ea6a0b019eaed2cd517e79f94459706..3b07dce207ed1f787c8f0f6eea9d4699be8bdf70
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 0cdae60ed7920f29e4a092c07d0aab7a33db16e7d308fb5b0becb6bbe57e49ff
 -fa792714ae62fa980f1767acc6d622a6727ceb677870243c88548423795dcb5b
++be71d1e24c9cbfbfa60df8159571929d85b1f281e32e6230b044c952eae91a92

diff --cc src/btree.c
Simple merge

diff --cc src/btreeInt.h
Simple merge

diff --cc src/pager.c
Simple merge

diff --cc src/sqliteInt.h
Simple merge

diff --cc src/vdbe.c
Simple merge