Performance improvements in btreeParseCell() by inlining the varint decoder.

FossilOrigin-Name: 172a864d14fd9f0e3e97d2a13b22222ae0fedd39

diff --cc manifest
index b0d501361f9126f5a8fe5a71a9f2f838589b47ef,ffb7cad2e91cafed60497b1941642e304e1ab5de..6413283a34164f7008b0f9739bc5e16808ceb418
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\sthe\sMemPage.xParseCell\smethod\sand\sprovide\svarious\simplementations\n(variations\son\sthe\sformer\sbtreeParseCellPtr())\sdepending\son\sthe\spage\stype.
- D 2015-06-19T17:19:34.228
 -C Fix\scorner\scases\sinvolving\scorrupt\svarint\svalues\sin\srecord\sheaders.
 -D 2015-06-19T20:08:39.479
++C Performance\simprovements\sin\sbtreeParseCell()\sby\sinlining\sthe\svarint\sdecoder.
++D 2015-06-19T20:31:02.328
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 1063c58075b7400d93326b0eb332b48a54f53025
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1286,7 -1286,7 +1286,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
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+ R 17322242ece767a3323f72561a7eab73
++T +closed 3189116b42c5ecef5e30c8b317f4458bbf8b9086
  U drh
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 -Z 6da824f4fe4f5bb0c3f4de7caaaa681b
++Z 9792c9ad3223b34d6cd839672f530e9d

diff --cc manifest.uuid
index 3ec0fcffb0ba37fb628e31ddb00fe07fc83624f2,6a3e25b56aba7f94a701f9a25bb01af7f9644f3f..37ea3acbb3ac5088c48bb39cbc7208ea79712ba9
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 41d03d883c4f7ca279eb9dd679f3ab81c8d957d9
 -3189116b42c5ecef5e30c8b317f4458bbf8b9086
++172a864d14fd9f0e3e97d2a13b22222ae0fedd39