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Changes In Branch vdbe-aux-perf Excluding Merge-Ins
This is equivalent to a diff from a5fa09657b to ff9eab9587
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2017-01-10
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| 15:08 | Fix a potential assertion fault discovered by OSS-Fuzz. (check-in: 71c03b59b6 user: drh tags: trunk) | |
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2017-01-09
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| 20:57 | Merge latest changes from trunk, and also move the perf-counter into the inner loop of sqlite3BtreeMovetoUnpacked(). (Leaf check-in: ff9eab9587 user: drh tags: vdbe-aux-perf) | |
| 19:55 | Remove a redundant assignment statement. (check-in: a5fa09657b user: drh tags: trunk) | |
| 19:27 | Performance optimization and size reduction in the OP_Variable opcode. (check-in: 237aa97452 user: drh tags: trunk) | |
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2017-01-07
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| 00:42 | This hack illustrates how to use the VDBE_PROFILE mechanism to show which bytecode operators are using resources other than time. In this case, the number of loops through the binary search code in sqlite3BtreeMovetoUnpacked() is measured, for the purpose of helping to identify unnecessary btree searches. (check-in: 746b183683 user: drh tags: vdbe-aux-perf) | |
Changes to src/btree.c.
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5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 |
upr = pPage->nCell-1;
assert( biasRight==0 || biasRight==1 );
idx = upr>>(1-biasRight); /* idx = biasRight ? upr : (lwr+upr)/2; */
pCur->aiIdx[pCur->iPage] = (u16)idx;
if( xRecordCompare==0 ){
for(;;){
i64 nCellKey;
pCell = findCellPastPtr(pPage, idx);
if( pPage->intKeyLeaf ){
while( 0x80 <= *(pCell++) ){
if( pCell>=pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;
}
}
getVarint(pCell, (u64*)&nCellKey);
| > | 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 |
upr = pPage->nCell-1;
assert( biasRight==0 || biasRight==1 );
idx = upr>>(1-biasRight); /* idx = biasRight ? upr : (lwr+upr)/2; */
pCur->aiIdx[pCur->iPage] = (u16)idx;
if( xRecordCompare==0 ){
for(;;){
i64 nCellKey;
sqlite3PerfCnt++;
pCell = findCellPastPtr(pPage, idx);
if( pPage->intKeyLeaf ){
while( 0x80 <= *(pCell++) ){
if( pCell>=pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;
}
}
getVarint(pCell, (u64*)&nCellKey);
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| ︙ | ︙ | |||
5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 |
}
assert( lwr+upr>=0 );
idx = (lwr+upr)>>1; /* idx = (lwr+upr)/2; */
}
}else{
for(;;){
int nCell; /* Size of the pCell cell in bytes */
pCell = findCellPastPtr(pPage, idx);
/* The maximum supported page-size is 65536 bytes. This means that
** the maximum number of record bytes stored on an index B-Tree
** page is less than 16384 bytes and may be stored as a 2-byte
** varint. This information is used to attempt to avoid parsing
** the entire cell by checking for the cases where the record is
| > | 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 |
}
assert( lwr+upr>=0 );
idx = (lwr+upr)>>1; /* idx = (lwr+upr)/2; */
}
}else{
for(;;){
int nCell; /* Size of the pCell cell in bytes */
sqlite3PerfCnt++;
pCell = findCellPastPtr(pPage, idx);
/* The maximum supported page-size is 65536 bytes. This means that
** the maximum number of record bytes stored on an index B-Tree
** page is less than 16384 bytes and may be stored as a 2-byte
** varint. This information is used to attempt to avoid parsing
** the entire cell by checking for the cases where the record is
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| ︙ | ︙ |
Changes to src/sqliteInt.h.
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4316 4317 4318 4319 4320 4321 4322 4323 4324 | #endif int sqlite3ExprVectorSize(Expr *pExpr); int sqlite3ExprIsVector(Expr *pExpr); Expr *sqlite3VectorFieldSubexpr(Expr*, int); Expr *sqlite3ExprForVectorField(Parse*,Expr*,int); void sqlite3VectorErrorMsg(Parse*, Expr*); #endif /* SQLITEINT_H */ | > > | 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 | #endif int sqlite3ExprVectorSize(Expr *pExpr); int sqlite3ExprIsVector(Expr *pExpr); Expr *sqlite3VectorFieldSubexpr(Expr*, int); Expr *sqlite3ExprForVectorField(Parse*,Expr*,int); void sqlite3VectorErrorMsg(Parse*, Expr*); sqlite3_uint64 sqlite3PerfCnt; #endif /* SQLITEINT_H */ |
Changes to src/vdbe.c.
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502 503 504 505 506 507 508 | #ifdef VDBE_PROFILE /* ** hwtime.h contains inline assembler code for implementing ** high-performance timing routines. */ | | > | 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 | #ifdef VDBE_PROFILE /* ** hwtime.h contains inline assembler code for implementing ** high-performance timing routines. */ /*#include "hwtime.h"*/ #define sqlite3Hwtime(x) sqlite3PerfCnt #endif #ifndef NDEBUG /* ** This function is only called from within an assert() expression. It ** checks that the sqlite3.nTransaction variable is correctly set to |
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