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Overview
| Comment: | Rename the OP_MX_JUMP macro to SQLITE_MX_JUMP_OPCODE to avoid confusing the opcode name generator. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | e554a4c38bda9c73bf129bb7c665c53ccc4d96a8 |
| User & Date: | drh 2016-04-11 16:35:05 |
Context
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2016-04-11
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| 16:43 | Simplification and performance improvements in sqlite3ExprDup() and its subroutines. More work is possible in this area. check-in: 476cc283 user: drh tags: trunk | |
| 16:35 | Rename the OP_MX_JUMP macro to SQLITE_MX_JUMP_OPCODE to avoid confusing the opcode name generator. check-in: e554a4c3 user: drh tags: trunk | |
| 14:49 | Performance improvement in sqlite3ExprDelete(). check-in: 60ad80e3 user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
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pOp = &p->aOp[p->nOp-1];
while(1){
/* Only JUMP opcodes and the short list of special opcodes in the switch
** below need to be considered. The mkopcodeh.tcl generator script groups
** all these opcodes together near the front of the opcode list. Skip
** any opcode that does not need processing by virtual of the fact that
** it is larger than OP_MX_JUMP, as a performance optimization.
*/
if( pOp->opcode<=OP_MX_JUMP ){
/* NOTE: Be sure to update mkopcodeh.tcl when adding or removing
** cases from this switch! */
switch( pOp->opcode ){
case OP_Transaction: {
if( pOp->p2!=0 ) p->readOnly = 0;
/* fall thru */
}
|
| | |
560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 |
pOp = &p->aOp[p->nOp-1];
while(1){
/* Only JUMP opcodes and the short list of special opcodes in the switch
** below need to be considered. The mkopcodeh.tcl generator script groups
** all these opcodes together near the front of the opcode list. Skip
** any opcode that does not need processing by virtual of the fact that
** it is larger than SQLITE_MX_JUMP_OPCODE, as a performance optimization.
*/
if( pOp->opcode<=SQLITE_MX_JUMP_OPCODE ){
/* NOTE: Be sure to update mkopcodeh.tcl when adding or removing
** cases from this switch! */
switch( pOp->opcode ){
case OP_Transaction: {
if( pOp->p2!=0 ) p->readOnly = 0;
/* fall thru */
}
|
Changes to tool/mkopcodeh.tcl.
256 257 258 259 260 261 262 263 |
puts ""
puts "/* The sqlite3P2Values() routine is able to run faster if it knows"
puts "** the value of the largest JUMP opcode. The smaller the maximum"
puts "** JUMP opcode the better, so the mkopcodeh.tcl script that"
puts "** generated this include file strives to group all JUMP opcodes"
puts "** together near the beginning of the list."
puts "*/"
puts "#define OP_MX_JUMP $mxJump /* Maximum JUMP opcode */"
|
| |
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puts "" puts "/* The sqlite3P2Values() routine is able to run faster if it knows" puts "** the value of the largest JUMP opcode. The smaller the maximum" puts "** JUMP opcode the better, so the mkopcodeh.tcl script that" puts "** generated this include file strives to group all JUMP opcodes" puts "** together near the beginning of the list." puts "*/" puts "#define SQLITE_MX_JUMP_OPCODE $mxJump /* Maximum JUMP opcode */" |