284 lines
8.1 KiB
Plaintext
284 lines
8.1 KiB
Plaintext
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# 2007 October 23
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#*************************************************************************
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# This file implements regression tests for SQLite library. The
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# focus of this script is measuring executing speed. More specifically,
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# the focus is on the speed of:
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#
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# * joins
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# * views
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# * sub-selects
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# * triggers
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#
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# $Id: speed4p.explain,v 1.1 2008/04/16 12:57:48 drh Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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speed_trial_init speed1
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# Set a uniform random seed
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expr srand(0)
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set sqlout [open speed1.txt w]
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proc tracesql {sql} {
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puts $::sqlout $sql\;
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}
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#db trace tracesql
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# The number_name procedure below converts its argment (an integer)
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# into a string which is the English-language name for that number.
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#
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# Example:
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#
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# puts [number_name 123] -> "one hundred twenty three"
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#
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set ones {zero one two three four five six seven eight nine
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ten eleven twelve thirteen fourteen fifteen sixteen seventeen
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eighteen nineteen}
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set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
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proc number_name {n} {
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if {$n>=1000} {
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set txt "[number_name [expr {$n/1000}]] thousand"
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set n [expr {$n%1000}]
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} else {
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set txt {}
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}
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if {$n>=100} {
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append txt " [lindex $::ones [expr {$n/100}]] hundred"
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set n [expr {$n%100}]
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}
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if {$n>=20} {
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append txt " [lindex $::tens [expr {$n/10}]]"
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set n [expr {$n%10}]
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}
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if {$n>0} {
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append txt " [lindex $::ones $n]"
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}
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set txt [string trim $txt]
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if {$txt==""} {set txt zero}
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return $txt
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}
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# Summary of tests:
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#
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# speed4p-join1: Join three tables using IPK index.
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# speed4p-join2: Join three tables using an index.
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# speed4p-join3: Join two tables without an index.
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#
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# speed4p-view1: Querying a view.
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# speed4p-table1: Same queries as in speed4p-view1, but run directly against
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# the tables for comparison purposes.
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#
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# speed4p-subselect1: A SELECT statement that uses many sub-queries..
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#
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# speed4p-trigger1: An INSERT statement that fires a trigger.
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# speed4p-trigger2: An UPDATE statement that fires a trigger.
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# speed4p-trigger3: A DELETE statement that fires a trigger.
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# speed4p-notrigger1: Same operation as trigger1, but without the trigger.
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# speed4p-notrigger2: " trigger2 "
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# speed4p-notrigger3: " trigger3 "
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#
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# Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows.
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# This creates a database of around 16MB.
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execsql {
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PRAGMA page_size=1024;
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PRAGMA cache_size=8192;
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PRAGMA locking_mode=EXCLUSIVE;
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BEGIN;
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CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
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CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
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CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
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CREATE VIEW v1 AS SELECT rowid, i, t FROM t1;
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CREATE VIEW v2 AS SELECT rowid, i, t FROM t2;
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CREATE VIEW v3 AS SELECT rowid, i, t FROM t3;
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}
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for {set jj 1} {$jj <= 3} {incr jj} {
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set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}]
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for {set ii 0} {$ii < 50000} {incr ii} {
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set i [expr {int(rand()*50000)}]
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set t [number_name $i]
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execsql $stmt
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}
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}
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execsql {
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CREATE INDEX i1 ON t1(t);
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CREATE INDEX i2 ON t2(t);
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CREATE INDEX i3 ON t3(t);
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COMMIT;
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}
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# Before running these tests, disable the compiled statement cache built into
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# the Tcl interface. This is because we want to test the speed of SQL
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# compilation as well as execution.
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#
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db cache size 0
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# Join t1, t2, t3 on IPK.
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set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid"
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explain $sql
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speed_trial speed4p-join1 50000 row $sql
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# Join t1, t2, t3 on the non-IPK index.
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set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t"
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explain $sql
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speed_trial speed4p-join2 50000 row $sql
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# Run 10000 simple queries against the views.
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set script {
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for {set ii 1} {$ii < 10000} {incr ii} {
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set v [expr {$ii*3}]
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set t [expr {$ii%3+1}]
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db eval "SELECT * FROM v$t WHERE rowid = \$v"
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}
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}
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explain {SELECT * FROm v1 WHERE rowid=$v}
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speed_trial_tcl speed4p-view1 10000 stmt $script
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# Run the same 10000 simple queries as in the previous test case against
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# the underlying tables. The compiled vdbe programs should be identical, so
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# the only difference in running time is the extra time taken to compile
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# the view definitions.
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#
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set script {
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for {set ii 1} {$ii < 10000} {incr ii} {
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set v [expr {$ii*3}]
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set t [expr {$ii%3+1}]
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db eval "SELECT t FROM t$t WHERE rowid = \$v"
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}
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}
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explain {SELECT * FROM t1 WHERE rowid=$v}
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speed_trial_tcl speed4p-table1 10000 stmt $script
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# Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects.
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#
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set script {
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for {set ii 1} {$ii < 10000} {incr ii} {
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set v [expr {$ii*3}]
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db eval {
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SELECT (SELECT t FROM t1 WHERE rowid = $v),
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(SELECT t FROM t2 WHERE rowid = $v),
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(SELECT t FROM t3 WHERE rowid = $v)
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}
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}
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}
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explain {
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SELECT (SELECT t FROM t1 WHERE rowid = $v),
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(SELECT t FROM t2 WHERE rowid = $v),
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(SELECT t FROM t3 WHERE rowid = $v)
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}
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speed_trial_tcl speed4p-subselect1 10000 stmt $script
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# The following block tests the speed of some DML statements that cause
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# triggers to fire.
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#
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execsql {
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CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT);
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CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
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CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN
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INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t);
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END;
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CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN
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INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t);
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END;
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CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN
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INSERT INTO log VALUES('DELETE OF t4', old.rowid, old.i, old.t);
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END;
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BEGIN;
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}
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set list {}
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for {set ii 1} {$ii < 10000} {incr ii} {
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lappend list $ii [number_name $ii]
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}
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set script {
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foreach {ii name} $::list {
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db eval {INSERT INTO t4 VALUES(NULL, $ii, $name)}
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}
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}
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explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}
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speed_trial_tcl speed4p-trigger1 10000 stmt $script
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set list {}
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for {set ii 1} {$ii < 20000} {incr ii 2} {
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set ii2 [expr {$ii*2}]
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lappend list $ii $ii2 [number_name $ii2]
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}
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set script {
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foreach {ii ii2 name} $::list {
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db eval {
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UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;
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}
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}
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}
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explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}
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speed_trial_tcl speed4p-trigger2 10000 stmt $script
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set script {
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for {set ii 1} {$ii < 20000} {incr ii 2} {
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db eval {DELETE FROM t4 WHERE rowid = $ii}
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}
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}
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explain {DELETE FROM t4 WHERE rowid = $ii}
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speed_trial_tcl speed4p-trigger3 10000 stmt $script
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execsql {COMMIT}
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# The following block contains the same tests as the above block that
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# tests triggers, with one crucial difference: no triggers are defined.
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# So the difference in speed between these tests and the preceding ones
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# is the amount of time taken to compile and execute the trigger programs.
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#
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execsql {
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DROP TABLE t4;
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DROP TABLE log;
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VACUUM;
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CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
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BEGIN;
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}
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set list {}
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for {set ii 1} {$ii < 10000} {incr ii} {
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lappend list $ii [number_name $ii]
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}
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set script {
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foreach {ii name} $::list {
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db eval {INSERT INTO t4 VALUES(NULL, $ii, $name);}
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}
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}
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explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}
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speed_trial_tcl speed4p-notrigger1 10000 stmt $script
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set list {}
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for {set ii 1} {$ii < 20000} {incr ii 2} {
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set ii2 [expr {$ii*2}]
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lappend list $ii $ii2 [number_name $ii2]
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}
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set script {
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foreach {ii ii2 name} $::list {
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db eval {
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UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;
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}
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}
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}
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explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}
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speed_trial_tcl speed4p-notrigger2 10000 stmt $script
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set script {
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for {set ii 1} {$ii < 20000} {incr ii 2} {
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db eval {DELETE FROM t4 WHERE rowid = $ii}
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}
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}
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explain {DELETE FROM t4 WHERE rowid = $ii}
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speed_trial_tcl speed4p-notrigger3 10000 stmt $script
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execsql {COMMIT}
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speed_trial_summary speed4
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finish_test
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