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Overview
| Comment: | Huge performance improvement for certain pathological cases for diffing of very large files. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
9e15437e971d3f823bf60aa14455676a |
| User & Date: | drh 2012-06-22 22:39:32 |
Context
|
2012-06-22
| ||
| 23:32 | Update the built-in SQLite to the latest version from the trunk of the SQLite tree. The diff of this SQLite change will be very slow without the previous check-in that enhances the diff performance. check-in: c5b835dd user: drh tags: trunk | |
| 22:39 | Huge performance improvement for certain pathological cases for diffing of very large files. check-in: 9e15437e user: drh tags: trunk | |
| 13:03 | Minor Makefile hack to allow "make clean" to work from ./src/. check-in: 4e4b6cc3 user: stephan tags: trunk | |
Changes
Changes to src/diff.c.
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
score = (iEX - iSX) - 0.05*skew - 0.05*dist;
if( score>bestScore ){
bestScore = score;
iSXb = iSX;
iSYb = iSY;
iEXb = iEX;
iEYb = iEY;
}else{
iSXp = iSX;
iSYp = iSY;
iEXp = iEX;
iEYp = iEY;
}
}
if( iSXb==iEXb && (iE1-iS1)*(iE2-iS2)<400 ){
|
| |
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
score = (iEX - iSX) - 0.05*skew - 0.05*dist;
if( score>bestScore ){
bestScore = score;
iSXb = iSX;
iSYb = iSY;
iEXb = iEX;
iEYb = iEY;
}else if( iEX>iEXp ){
iSXp = iSX;
iSYp = iSY;
iEXp = iEX;
iEYp = iEY;
}
}
if( iSXb==iEXb && (iE1-iS1)*(iE2-iS2)<400 ){
|