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Changes In Branch reoptimizeArm Excluding Merge-Ins

This is equivalent to a diff from 2aa50f6f20 to b9b22fae69

2015-11-05
11:47
Remove a #pragma used to work around an issues with MSVC 2012 that has been overcome but subsequent changes. (check-in: 8303e4cfed user: drh tags: trunk)
03:26
Remove #pragma that was used to work around an obsolete issue with MSVC 2012. (Closed-Leaf check-in: b9b22fae69 user: mistachkin tags: reoptimizeArm)
2015-11-04
22:31
Performance improvements in the getAndInitPage() routine of btree.c. (check-in: 2aa50f6f20 user: drh tags: trunk)
20:22
Rename the sqlite3PagerAcquire() function to sqlite3PagerGet(). The former macro called sqlite3PagerGet() has been removed. (check-in: 708253be34 user: drh tags: trunk)

Changes to src/btree.c.

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** size of a cell stored within an internal node is always less than 1/4
** of the page-size, the aOvflSpace[] buffer is guaranteed to be large
** enough for all overflow cells.
**
** If aOvflSpace is set to a null pointer, this function returns 
** SQLITE_NOMEM.
*/
#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM)
#pragma optimize("", off)
#endif
static int balance_nonroot(
  MemPage *pParent,               /* Parent page of siblings being balanced */
  int iParentIdx,                 /* Index of "the page" in pParent */
  u8 *aOvflSpace,                 /* page-size bytes of space for parent ovfl */
  int isRoot,                     /* True if pParent is a root-page */
  int bBulk                       /* True if this call is part of a bulk load */
){
................................................................................
  }
  for(i=0; i<nNew; i++){
    releasePage(apNew[i]);
  }

  return rc;
}
#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM)
#pragma optimize("", on)
#endif


/*
** This function is called when the root page of a b-tree structure is
** overfull (has one or more overflow pages).
**
** A new child page is allocated and the contents of the current root







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** size of a cell stored within an internal node is always less than 1/4
** of the page-size, the aOvflSpace[] buffer is guaranteed to be large
** enough for all overflow cells.
**
** If aOvflSpace is set to a null pointer, this function returns 
** SQLITE_NOMEM.
*/



static int balance_nonroot(
  MemPage *pParent,               /* Parent page of siblings being balanced */
  int iParentIdx,                 /* Index of "the page" in pParent */
  u8 *aOvflSpace,                 /* page-size bytes of space for parent ovfl */
  int isRoot,                     /* True if pParent is a root-page */
  int bBulk                       /* True if this call is part of a bulk load */
){
................................................................................
  }
  for(i=0; i<nNew; i++){
    releasePage(apNew[i]);
  }

  return rc;
}





/*
** This function is called when the root page of a b-tree structure is
** overfull (has one or more overflow pages).
**
** A new child page is allocated and the contents of the current root