Index: src/backup.c
==================================================================
--- src/backup.c
+++ src/backup.c
@@ -291,11 +291,12 @@
   */
   for(iOff=iEnd-(i64)nSrcPgsz; rc==SQLITE_OK && iOff<iEnd; iOff+=nDestPgsz){
     DbPage *pDestPg = 0;
     Pgno iDest = (Pgno)(iOff/nDestPgsz)+1;
     if( iDest==PENDING_BYTE_PAGE(p->pDest->pBt) ) continue;
-    if( SQLITE_OK==(rc = sqlite3PagerGet(pDestPager, iDest, &pDestPg, 0))
+    if( SQLITE_OK==(rc = sqlite3PagerGet(pDestPager, iDest, &pDestPg, 
+                                         PAGER_GET_NOINIT))
      && SQLITE_OK==(rc = sqlite3PagerWrite(pDestPg))
     ){
       const u8 *zIn = &zSrcData[iOff%nSrcPgsz];
       u8 *zDestData = sqlite3PagerGetData(pDestPg);
       u8 *zOut = &zDestData[iOff%nDestPgsz];

Index: src/pager.c
==================================================================
--- src/pager.c
+++ src/pager.c
@@ -5298,11 +5298,11 @@
   int flags           /* PAGER_GET_XXX flags */
 ){
   int rc = SQLITE_OK;
   PgHdr *pPg = 0;
   u32 iFrame = 0;                 /* Frame to read from WAL file */
-  const int noContent = (flags & PAGER_GET_NOCONTENT);
+#define noContent  ((flags & PAGER_GET_NOCONTENT)!=0)
 
   /* It is acceptable to use a read-only (mmap) page for any page except
   ** page 1 if there is no write-transaction open or the ACQUIRE_READONLY
   ** flag was specified by the caller. And so long as the db is not a 
   ** temporary or in-memory database.  */
@@ -5430,12 +5430,14 @@
         }
         TESTONLY( rc = ) addToSavepointBitvecs(pPager, pgno);
         testcase( rc==SQLITE_NOMEM );
         sqlite3EndBenignMalloc();
       }
-      memset(pPg->pData, 0, pPager->pageSize);
-      IOTRACE(("ZERO %p %d\n", pPager, pgno));
+      if( (flags & PAGER_GET_NOINIT)==0 ){
+        memset(pPg->pData, 0, pPager->pageSize);
+        IOTRACE(("ZERO %p %d\n", pPager, pgno));
+      }
     }else{
       if( pagerUseWal(pPager) && bMmapOk==0 ){
         rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iFrame);
         if( rc!=SQLITE_OK ) goto pager_acquire_err;
       }
@@ -5459,10 +5461,11 @@
   pagerUnlockIfUnused(pPager);
 
   *ppPage = 0;
   return rc;
 }
+#undef noContent
 
 /*
 ** Acquire a page if it is already in the in-memory cache.  Do
 ** not read the page from disk.  Return a pointer to the page,
 ** or 0 if the page is not in cache. 

Index: src/pager.h
==================================================================
--- src/pager.h
+++ src/pager.h
@@ -81,10 +81,11 @@
 /*
 ** Flags that make up the mask passed to sqlite3PagerGet().
 */
 #define PAGER_GET_NOCONTENT     0x01  /* Do not load data from disk */
 #define PAGER_GET_READONLY      0x02  /* Read-only page is acceptable */
+#define PAGER_GET_NOINIT        0x04  /* Do not initialize the page */
 
 /*
 ** Flags for sqlite3PagerSetFlags()
 */
 #define PAGER_SYNCHRONOUS_OFF       0x01  /* PRAGMA synchronous=OFF */