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| author |   Ingo Schwarze <schwarze@openbsd.org> | 2014-04-16 18:59:43 +0000 |
|---|---|---|
| committer | Ingo Schwarze <schwarze@openbsd.org> | 2014-04-16 18:59:43 +0000 |
| commit | a63a6bea52c160a0ae3a17b7dd4931b76f84e5bd (patch) | |
| tree | d2bc193b7751bde58e3524649bd233e2105b46bd /mandocdb.c | |
| parent | 82295da1cbb8b8780637173094f99de1b14bb2e9 (diff) | |
| download | mandoc-a63a6bea52c160a0ae3a17b7dd4931b76f84e5bd.tar.gz mandoc-a63a6bea52c160a0ae3a17b7dd4931b76f84e5bd.tar.zst mandoc-a63a6bea52c160a0ae3a17b7dd4931b76f84e5bd.zip | |
Give the mlinks and keys tables a pageid index,
as suggested by jeremy@ and espie@.
The mlinks index speeds up basic apropos(1) searches by around 30%
because it speeds up the final SELECT FROM mlinks query by about 95%.
For large result sets, the overall speedup gets even larger, in the
extreme case of "apropos Nd~." bymore than 90%.
The keys index finally makes the apropos(1) -O option usable: It no longer
incurs relevant extra cost, while in the past it was embarrassingly slow.
This comes at a cost: Total database build times grow by about 5%,
and each index adds about 10% database size with -Q. I consider that
acceptable in view of the huge apropos(1) performance gains.
The -Q database for /usr/share/man still remains below 1 MB.
Diffstat (limited to 'mandocdb.c')
| -rw-r--r-- | mandocdb.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -1,4 +1,4 @@ -/* $Id: mandocdb.c,v 1.135 2014/04/13 22:03:04 schwarze Exp $ */ +/* $Id: mandocdb.c,v 1.136 2014/04/16 18:59:43 schwarze Exp $ */ /* * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv> * Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org> @@ -2182,6 +2182,7 @@ create_tables: " \"pageid\" INTEGER NOT NULL REFERENCES mpages(id) " "ON DELETE CASCADE\n" ");\n" + "CREATE INDEX mlinks_pageid_idx ON mlinks (pageid);\n" "\n" "CREATE TABLE \"names\" (\n" " \"bits\" INTEGER NOT NULL,\n" @@ -2195,7 +2196,8 @@ create_tables: " \"key\" TEXT NOT NULL,\n" " \"pageid\" INTEGER NOT NULL REFERENCES mpages(id) " "ON DELETE CASCADE\n" - ");\n"; + ");\n" + "CREATE INDEX keys_pageid_idx ON keys (pageid);\n"; if (SQLITE_OK != sqlite3_exec(db, sql, NULL, NULL, NULL)) { exitcode = (int)MANDOCLEVEL_SYSERR; |