About a 1% overall performance improvement by using a macro to avoid

no-op calls to sqlite3MemReleaseExternal().

FossilOrigin-Name: ff71d20a9ed129bd1785a3f7a777ce62098735b7

manifest

@@ -1,5 +1,5 @@
-C Small\sperformance\simprovement\sto\sOP_Column.
-D 2011-08-29T02:16:18.855
+C About\sa\s1%\soverall\sperformance\simprovement\sby\susing\sa\smacro\sto\savoid\nno-op\scalls\sto\ssqlite3MemReleaseExternal().
+D 2011-08-29T02:49:41.731
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 8c930e7b493d59099ea1304bd0f2aed152eb3315
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -238,13 +238,13 @@ F src/update.c 74a6cfb34e9732c1e2a86278b229913b4b51eeec
 F src/utf.c c53eb7404b3eb5c1cbb5655c6a7a0e0ce6bd50f0
 F src/util.c 06302ffd2b80408d4f6c7af71f7090e0cf8d8ff7
 F src/vacuum.c 05513dca036a1e7848fe18d5ed1265ac0b32365e
-F src/vdbe.c dc84628c47e76ffa5dd945afea1460815323ad91
+F src/vdbe.c 9165b35da939f4a66c7e68b0c6d3f017ca982cb1
 F src/vdbe.h c1eeedacab6bcf1e7c2cf8203ba9763a616f9a86
-F src/vdbeInt.h f9250326f264ca5f100acc19e9c07096bb889096
+F src/vdbeInt.h 70767f6504aac4f0057ec2a55738470a890789ac
 F src/vdbeapi.c 11dc47987abacb76ad016dcf5abc0dc422482a98
 F src/vdbeaux.c de1e4cab060a45df9ebee68dd63543d14559f0e7
 F src/vdbeblob.c f024f0bf420f36b070143c32b15cc7287341ffd3
-F src/vdbemem.c 0498796b6ffbe45e32960d6a1f5adfb6e419883b
+F src/vdbemem.c 5e6effb96dd53d233361cbfaa3f0a43b9af689e9
 F src/vdbesort.c 8a61a6d731cbe612217edf9eece6197f37c9489e
 F src/vdbetrace.c 5d0dc3d5fd54878cc8d6d28eb41deb8d5885b114
 F src/vtab.c 901791a47318c0562cd0c676a2c6ff1bc530e582
@@ -961,7 +961,7 @@ F tool/symbols.sh caaf6ccc7300fd43353318b44524853e222557d5
 F tool/tostr.awk 11760e1b94a5d3dcd42378f3cc18544c06cfa576
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh b7fdb2cc525f5ef4fa43c80e771636dd3690f9d2
-P edff9d4a995095e555fcc9aec4c56f4bcaa1557e
-R 2bdc90f10d7d2094fa6ddf41f90c24fd
+P b6b73a747ad8d0f026074e41c2a4adc529ec2674
+R 285e2022a0bbe1b677ddbb6dec295cd8
 U drh
-Z 9bbe13d88effafce7032c1658f4f21f3
+Z 74a42c07c09977852193d878c3468fe6

manifest.uuid

@@ -1 +1 @@
-b6b73a747ad8d0f026074e41c2a4adc529ec2674
+ff71d20a9ed129bd1785a3f7a777ce62098735b7

src/vdbe.c

@@ -673,7 +673,7 @@ int sqlite3VdbeExec(
       assert( pOp->p2<=p->nMem );
       pOut = &aMem[pOp->p2];
       memAboutToChange(p, pOut);
-      sqlite3VdbeMemReleaseExternal(pOut);
+      MemReleaseExt(pOut);
       pOut->flags = MEM_Int;
     }
 
@@ -2344,7 +2344,7 @@ case OP_Column: {
   if( aOffset[p2] ){
     assert( rc==SQLITE_OK );
     if( zRec ){
-      sqlite3VdbeMemReleaseExternal(pDest);
+      MemReleaseExt(pDest);
       sqlite3VdbeSerialGet((u8 *)&zRec[aOffset[p2]], aType[p2], pDest);
     }else{
       len = sqlite3VdbeSerialTypeLen(aType[p2]);

src/vdbeInt.h

@@ -384,6 +384,9 @@ int sqlite3VdbeMemNumerify(Mem*);
 int sqlite3VdbeMemFromBtree(BtCursor*,int,int,int,Mem*);
 void sqlite3VdbeMemRelease(Mem *p);
 void sqlite3VdbeMemReleaseExternal(Mem *p);
+#define MemReleaseExt(X)  \
+  if((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame)) \
+    sqlite3VdbeMemReleaseExternal(X);
 int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
 const char *sqlite3OpcodeName(int);
 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);

src/vdbemem.c

@@ -271,24 +271,18 @@ int sqlite3VdbeMemFinalize(Mem *pMem, FuncDef *pFunc){
 */
 void sqlite3VdbeMemReleaseExternal(Mem *p){
   assert( p->db==0 || sqlite3_mutex_held(p->db->mutex) );
-  testcase( p->flags & MEM_Agg );
-  testcase( p->flags & MEM_Dyn );
-  testcase( p->flags & MEM_RowSet );
-  testcase( p->flags & MEM_Frame );
-  if( p->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame) ){
-    if( p->flags&MEM_Agg ){
-      sqlite3VdbeMemFinalize(p, p->u.pDef);
-      assert( (p->flags & MEM_Agg)==0 );
-      sqlite3VdbeMemRelease(p);
-    }else if( p->flags&MEM_Dyn && p->xDel ){
-      assert( (p->flags&MEM_RowSet)==0 );
-      p->xDel((void *)p->z);
-      p->xDel = 0;
-    }else if( p->flags&MEM_RowSet ){
-      sqlite3RowSetClear(p->u.pRowSet);
-    }else if( p->flags&MEM_Frame ){
-      sqlite3VdbeMemSetNull(p);
-    }
+  if( p->flags&MEM_Agg ){
+    sqlite3VdbeMemFinalize(p, p->u.pDef);
+    assert( (p->flags & MEM_Agg)==0 );
+    sqlite3VdbeMemRelease(p);
+  }else if( p->flags&MEM_Dyn && p->xDel ){
+    assert( (p->flags&MEM_RowSet)==0 );
+    p->xDel((void *)p->z);
+    p->xDel = 0;
+  }else if( p->flags&MEM_RowSet ){
+    sqlite3RowSetClear(p->u.pRowSet);
+  }else if( p->flags&MEM_Frame ){
+    sqlite3VdbeMemSetNull(p);
   }
 }
 
@@ -298,7 +292,7 @@ void sqlite3VdbeMemReleaseExternal(Mem *p){
 ** (Mem.type==SQLITE_TEXT).
 */
 void sqlite3VdbeMemRelease(Mem *p){
-  sqlite3VdbeMemReleaseExternal(p);
+  MemReleaseExt(p);
   sqlite3DbFree(p->db, p->zMalloc);
   p->z = 0;
   p->zMalloc = 0;
@@ -620,7 +614,7 @@ void sqlite3VdbeMemPrepareToChange(Vdbe *pVdbe, Mem *pMem){
 */
 void sqlite3VdbeMemShallowCopy(Mem *pTo, const Mem *pFrom, int srcType){
   assert( (pFrom->flags & MEM_RowSet)==0 );
-  sqlite3VdbeMemReleaseExternal(pTo);
+  MemReleaseExt(pTo);
   memcpy(pTo, pFrom, MEMCELLSIZE);
   pTo->xDel = 0;
   if( (pFrom->flags&MEM_Static)==0 ){
@@ -638,7 +632,7 @@ int sqlite3VdbeMemCopy(Mem *pTo, const Mem *pFrom){
   int rc = SQLITE_OK;
 
   assert( (pFrom->flags & MEM_RowSet)==0 );
-  sqlite3VdbeMemReleaseExternal(pTo);
+  MemReleaseExt(pTo);
   memcpy(pTo, pFrom, MEMCELLSIZE);
   pTo->flags &= ~MEM_Dyn;