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performance fix

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git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@4979 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Linas Vepstas 2001-07-24 04:15:43 +00:00
parent bcf49d693d
commit 4bfdb526d2
1 changed files with 15 additions and 0 deletions
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15
src/engine/sql/PostgresBackend.c
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@ -481,8 +481,23 @@ pgendRunQuery (Backend *bend, Query *q)
/* stage transactions, save some postgres overhead */
xaccGroupBeginStagedTransactionTraversals (be->topgroup);
/* We will be doing a bulk insertion of transactions below.
* We can gain a tremendous performance improvement,
* for example, a factor of 10x when querying 3000 transactions,
* by opening all accounts for editing before we start, and
* closing them all only after we're done. This is because
* an account must be open for editing in order to insert a split,
* and when the commit is made, the splits are sorted in date order.
* If we're sloppy, then there's an ordering for every insertion.
* By defering the Commit, we defer the sort, and thus save gobs.
* Of course, this hurts 'shallow' queries some, but I beleive
* by not very much.
*/
ncalls = 0;
xaccAccountGroupBeginEdit(be->topgroup);
pgendFillOutToCheckpoint (be, sql_query_string);
xaccAccountGroupCommitEdit(be->topgroup);
PINFO ("number of calls to fill out=%d", ncalls);
sql_Query_destroy(sq);