mirrors
/
sqlite
mirror of https://github.com/sqlite/sqlite
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Optimization to sqltie3BtreeParseCellPtr. 0.3% performance increase. (CVS 5432) 

FossilOrigin-Name: 77e099ad7de84fe07dfeb4c045c769653dd13b93
This commit is contained in:
drh 2008-07-18 00:57:33 +00:00
parent 44845221ed
commit 79df1f4a37
3 changed files with 21 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
manifest
View File

@ -1,5 +1,5 @@
C Simplify\sthe\sb-tree\slogic\sby\staking\sadvantage\sof\sthe\sfact\sthat\sall\sb-trees\nare\seither\sintkey+leafdata\sor\szerodata.\s(CVS\s5431)
D 2008-07-17T18:39:58
C Optimization\sto\ssqltie3BtreeParseCellPtr.\s\s0.3%\sperformance\sincrease.\s(CVS\s5432)
D 2008-07-18T00:57:33
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in a03f7cb4f7ad50bc53a788c6c544430e81f95de4
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@ -96,7 +96,7 @@ F src/attach.c b18ba42c77f7d3941f5d23d2ca20fa1d841a4e91
F src/auth.c c8b2ab5c8bad4bd90ed7c294694f48269162c627
F src/bitvec.c 95c86bd18d8fedf0533f5af196192546e10a7e7d
F src/btmutex.c 709cad2cdca0afd013f0f612363810e53f59ec53
F src/btree.c c618d62fb41642216f8fc5be403c36f32e1b25d6
F src/btree.c 5299a702966d3c32618340cae49cebafc5e93870
F src/btree.h 03256ed7ee42b5ecacbe887070b0f8249e7d069d
F src/btreeInt.h 2aa6dc53b1801bb22815a5be22e03be121f3bd8f
F src/build.c bac7233d984be3805aaa41cf500f7ee12dc97249
@ -608,7 +608,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
P 26a203d894edd0091ac60862956e42d22167011e
R 0aa24510df7c6bac75839ea22cde6884
P 29d3bfd7c9a68078385354394052612bf812859b
R 52c1e00d28149edaa06e0b96ba148399
U drh
Z 2661cde038f2c435549bd085c583b89a
Z ba442f29937e797f8880a62ff02e96e8

2
manifest.uuid
View File

@ -1 +1 @@
29d3bfd7c9a68078385354394052612bf812859b
77e099ad7de84fe07dfeb4c045c769653dd13b93

29
src/btree.c
View File

@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.484 2008/07/17 18:39:58 drh Exp $
** $Id: btree.c,v 1.485 2008/07/18 00:57:33 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
@ -564,31 +564,30 @@ void sqlite3BtreeParseCellPtr(
assert( pPage->leaf==0 || pPage->leaf==1 );
n = pPage->childPtrSize;
assert( n==4-4*pPage->leaf );
if( pPage->hasData ){
n += getVarint32(&pCell[n], nPayload);
}else{
nPayload = 0;
}
pInfo->nData = nPayload;
if( pPage->intKey ){
n += getVarint(&pCell[n], (u64 *)&pInfo->nKey);
if( pPage->hasData ){
n += getVarint32(&pCell[n], nPayload);
}else{
nPayload = 0;
}
n += getVarint(&pCell[n], (u64*)&pInfo->nKey);
pInfo->nData = nPayload;
}else{
u32 x;
n += getVarint32(&pCell[n], x);
pInfo->nKey = x;
nPayload += x;
pInfo->nData = 0;
n += getVarint32(&pCell[n], nPayload);
pInfo->nKey = nPayload;
}
pInfo->nPayload = nPayload;
pInfo->nHeader = n;
if( nPayload<=pPage->maxLocal ){
if( likely(nPayload<=pPage->maxLocal) ){
/* This is the (easy) common case where the entire payload fits
** on the local page. No overflow is required.
*/
int nSize; /* Total size of cell content in bytes */
nSize = nPayload + n;
pInfo->nLocal = nPayload;
pInfo->iOverflow = 0;
nSize = nPayload + n;
if( nSize<4 ){
if( (nSize & ~3)==0 ){
nSize = 4; /* Minimum cell size is 4 */
}
pInfo->nSize = nSize;