1 files changed, 6 insertions, 0 deletions
diff --git a/src/printf.c b/src/printf.c
index 85d237f0e..ac7b05163 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -770,6 +770,11 @@ static int sqlite3StrAccumEnlarge(StrAccum *p, int N){
     char *zOld = (p->zText==p->zBase ? 0 : p->zText);
     i64 szNew = p->nChar;
     szNew += N + 1;
+    if( szNew+p->nChar<=p->mxAlloc ){
+      /* Force exponential buffer size growth as long as it does not overflow,
+      ** to avoid having to call this routine too often */
+      szNew += p->nChar;
+    }
     if( szNew > p->mxAlloc ){
       sqlite3StrAccumReset(p);
       setStrAccumError(p, STRACCUM_TOOBIG);
@@ -786,6 +791,7 @@ static int sqlite3StrAccumEnlarge(StrAccum *p, int N){
       assert( p->zText!=0 || p->nChar==0 );
       if( zOld==0 && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar);
       p->zText = zNew;
+      p->nAlloc = sqlite3DbMallocSize(p->db, zNew);
     }else{
       sqlite3StrAccumReset(p);
       setStrAccumError(p, STRACCUM_NOMEM);