Performance improvement in sqlite3_step() by creating a new mTrace flag

for the legacy xProfile pointer that is set by sqlite3_profile().

FossilOrigin-Name: e28584e8bc7b7405380064b60523fa6191f827f74075f6d117eb7732d752ba5e

manifest

@@ -1,5 +1,5 @@
-C Small\sperformance\sincrease\sin\ssqlite3_step()\sfor\sthe\scommon\scase\swhere\nit\sreturns\sSQLITE_ROW.
-D 2018-12-04T13:51:26.090
+C Performance\simprovement\sin\ssqlite3_step()\sby\screating\sa\snew\smTrace\sflag\nfor\sthe\slegacy\sxProfile\spointer\sthat\sis\sset\sby\ssqlite3_profile().
+D 2018-12-04T14:33:02.434
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in a050c8670ea0d7b37b2192306cbb50d392acd9902b84e9b56f3444d006f97a6c
@@ -471,7 +471,7 @@ F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c f12f27eb606d601825be9a229a7390a8d64d40226697883f96de8e088d620055
 F src/legacy.c 134ab3e3fae00a0f67a5187981d6935b24b337bcf0f4b3e5c9fa5763da95bf4e
 F src/loadext.c 9050dd153b5583804184be9c9dee9ebb554178d6db1f8ac280899e8aad9060e6
-F src/main.c 4cfb3913cc9e65d3ac649b1785ac753fc225d29425d5437e012f7eac0cefe0eb
+F src/main.c 5a94791735ddd51804b75b7ef4645c25cbe6fe1d0e8f25851b2ed1211ad3d076
 F src/malloc.c 07295435093ce354c6d9063ac05a2eeae28bd251d2e63c48b3d67c12c76f7e18
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c c12a42539b1ba105e3707d0e628ad70e611040d8f5e38cf942cee30c867083de
@@ -512,7 +512,7 @@ F src/shell.c.in 482e23a370cbe5b0d4c73a0f0f5fce34f7caa08a14a8d75e12f0225c4e14915
 F src/sqlite.h.in cce9feede1c1c03923c091b4bbbd081dd77aaf92024cc2cdbf65f712c2f668c3
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 960f1b86c3610fa23cb6a267572a97dcf286e77aa0dd3b9b23292ffaa1ea8683
-F src/sqliteInt.h 1161f7579cdd6217737a66517ef27f4016426603eff492e9b31f45a7d7d4c61f
+F src/sqliteInt.h f54ee1ef1e0f99d27af20561df72aac9158ed420cfc3a2e330fdee40672daf37
 F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
 F src/status.c 46e7aec11f79dad50965a5ca5fa9de009f7d6bde08be2156f1538a0a296d4d0e
 F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@ -581,7 +581,7 @@ F src/vacuum.c 836cadc922de866c849e23a75f93d344cdc143d388339305d09a3fed27e8798d
 F src/vdbe.c 005e691ea4c7d51e6c1a69d9389aeb34700884c85f51681817ddea3fdc2fc39b
 F src/vdbe.h 5081dcc497777efe5e9ebe7330d283a044a005e4bdda2e2e984f03bf89a0d907
 F src/vdbeInt.h 437e6c6af679fdf157867eb83a8adc6cf5145d6774453c2214cfd0bd01d92980
-F src/vdbeapi.c 666993b7939530b3e16b21d07425809d4aaa5d75917ba34c513e91ee36c83467
+F src/vdbeapi.c dc825a6ec99a5066c1aa0d9824509057c0510f03cc8c72f81ba074553f8a5ae8
 F src/vdbeaux.c f547901b1aa9e2d81c63f06893f633648e434180666a827aacb547d7d6c8a601
 F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
 F src/vdbemem.c 7b3305bc4a5139f4536ac9b5f61da0f915e49d2e3fdfa87dfdfa9d7aba8bc1e9
@@ -1781,7 +1781,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 70fe8ec2ae3099b8773834c7ac2e56768addbecd57956ac523e71a7dc264049c
-R 86cab02da9395ff714960a3873202ed5
+P 893448265299f4c70c32c8e92ea66f8d33c1c213b21701f73fa3815514cd5ef6
+R 8ed134deac4c27b14c838ed0e6319d34
 U drh
-Z a2cf828add1aa9e207a374e8188d7cf1
+Z 84b5f74d4a6ae62e21d6700a38fd119f

manifest.uuid

@@ -1 +1 @@
-893448265299f4c70c32c8e92ea66f8d33c1c213b21701f73fa3815514cd5ef6
+e28584e8bc7b7405380064b60523fa6191f827f74075f6d117eb7732d752ba5e

src/main.c

@@ -1996,6 +1996,7 @@ void *sqlite3_trace(sqlite3 *db, void(*xTrace)(void*,const char*), void *pArg){
   sqlite3_mutex_enter(db->mutex);
   pOld = db->pTraceArg;
   db->mTrace = xTrace ? SQLITE_TRACE_LEGACY : 0;
+  if( db->xProfile ) db->mTrace |= SQLITE_TRACE_XPROFILE;
   db->xTrace = (int(*)(u32,void*,void*,void*))xTrace;
   db->pTraceArg = pArg;
   sqlite3_mutex_leave(db->mutex);
@@ -2020,6 +2021,9 @@ int sqlite3_trace_v2(
   if( mTrace==0 ) xTrace = 0;
   if( xTrace==0 ) mTrace = 0;
   db->mTrace = mTrace;
+#ifndef SQLITE_OMIT_DEPRECATED
+  if( db->xProfile ) db->mTrace |= SQLITE_TRACE_XPROFILE;
+#endif
   db->xTrace = xTrace;
   db->pTraceArg = pArg;
   sqlite3_mutex_leave(db->mutex);
@@ -2052,6 +2056,8 @@ void *sqlite3_profile(
   pOld = db->pProfileArg;
   db->xProfile = xProfile;
   db->pProfileArg = pArg;
+  db->mTrace &= SQLITE_TRACE_NONLEGACY_MASK;
+  if( db->xProfile ) db->mTrace |= SQLITE_TRACE_XPROFILE;
   sqlite3_mutex_leave(db->mutex);
   return pOld;
 }

src/sqliteInt.h

@@ -1356,10 +1356,13 @@ void sqlite3CryptFunc(sqlite3_context*,int,sqlite3_value**);
 /* This is an extra SQLITE_TRACE macro that indicates "legacy" tracing
 ** in the style of sqlite3_trace()
 */
-#define SQLITE_TRACE_LEGACY  0x80
+#define SQLITE_TRACE_LEGACY          0x40     /* Use the legacy xTrace */
+#define SQLITE_TRACE_XPROFILE        0x80     /* Use the legacy xProfile */
 #else
 #define SQLITE_TRACE_LEGACY          0
+#define SQLITE_TRACE_XPROFILE        0
 #endif /* SQLITE_OMIT_DEPRECATED */
+#define SQLITE_TRACE_NONLEGACY_MASK  0x0f     /* Normal flags */
 
 
 /*
@@ -1418,8 +1421,10 @@ struct sqlite3 {
   void **aExtension;            /* Array of shared library handles */
   int (*xTrace)(u32,void*,void*,void*);     /* Trace function */
   void *pTraceArg;                          /* Argument to the trace function */
+#ifndef SQLITE_OMIT_DEPRECATED
   void (*xProfile)(void*,const char*,u64);  /* Profiling function */
   void *pProfileArg;                        /* Argument to profile function */
+#endif
   void *pCommitArg;                 /* Argument to xCommitCallback() */
   int (*xCommitCallback)(void*);    /* Invoked at every commit. */
   void *pRollbackArg;               /* Argument to xRollbackCallback() */

src/vdbeapi.c

@@ -62,14 +62,16 @@ static SQLITE_NOINLINE void invokeProfileCallback(sqlite3 *db, Vdbe *p){
   sqlite3_int64 iNow;
   sqlite3_int64 iElapse;
   assert( p->startTime>0 );
-  assert( db->xProfile!=0 || (db->mTrace & SQLITE_TRACE_PROFILE)!=0 );
+  assert( (db->mTrace & (SQLITE_TRACE_PROFILE|SQLITE_TRACE_XPROFILE))!=0 );
   assert( db->init.busy==0 );
   assert( p->zSql!=0 );
   sqlite3OsCurrentTimeInt64(db->pVfs, &iNow);
   iElapse = (iNow - p->startTime)*1000000;
+#ifndef SQLITE_OMIT_DEPRECATED  	
   if( db->xProfile ){
     db->xProfile(db->pProfileArg, p->zSql, iElapse);
   }
+#endif
   if( db->mTrace & SQLITE_TRACE_PROFILE ){
     db->xTrace(SQLITE_TRACE_PROFILE, db->pTraceArg, p, (void*)&iElapse);
   }
@@ -602,7 +604,7 @@ static int sqlite3Step(Vdbe *p){
     );
 
 #ifndef SQLITE_OMIT_TRACE
-    if( (db->xProfile || (db->mTrace & SQLITE_TRACE_PROFILE)!=0)
+    if( (db->mTrace & (SQLITE_TRACE_PROFILE|SQLITE_TRACE_XPROFILE))!=0
         && !db->init.busy && p->zSql ){
       sqlite3OsCurrentTimeInt64(db->pVfs, &p->startTime);
     }else{