wasCSharpSQLite – Blame information for rev 4

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1 office 1 # 2007 October 23
2 #
3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
5 #
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
9 #
10 #*************************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this script is measuring executing speed. More specifically,
13 # the focus is on the speed of:
14 #
15 # * joins
16 # * views
17 # * sub-selects
18 # * triggers
19 #
20 # $Id: speed4p.explain,v 1.1 2008/04/16 12:57:48 drh Exp $
21 #
22  
23 set testdir [file dirname $argv0]
24 source $testdir/tester.tcl
25 speed_trial_init speed1
26  
27 # Set a uniform random seed
28 expr srand(0)
29  
30 set sqlout [open speed1.txt w]
31 proc tracesql {sql} {
32 puts $::sqlout $sql\;
33 }
34 #db trace tracesql
35  
36 # The number_name procedure below converts its argment (an integer)
37 # into a string which is the English-language name for that number.
38 #
39 # Example:
40 #
41 # puts [number_name 123] -> "one hundred twenty three"
42 #
43 set ones {zero one two three four five six seven eight nine
44 ten eleven twelve thirteen fourteen fifteen sixteen seventeen
45 eighteen nineteen}
46 set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
47 proc number_name {n} {
48 if {$n>=1000} {
49 set txt "[number_name [expr {$n/1000}]] thousand"
50 set n [expr {$n%1000}]
51 } else {
52 set txt {}
53 }
54 if {$n>=100} {
55 append txt " [lindex $::ones [expr {$n/100}]] hundred"
56 set n [expr {$n%100}]
57 }
58 if {$n>=20} {
59 append txt " [lindex $::tens [expr {$n/10}]]"
60 set n [expr {$n%10}]
61 }
62 if {$n>0} {
63 append txt " [lindex $::ones $n]"
64 }
65 set txt [string trim $txt]
66 if {$txt==""} {set txt zero}
67 return $txt
68 }
69  
70 # Summary of tests:
71 #
72 # speed4p-join1: Join three tables using IPK index.
73 # speed4p-join2: Join three tables using an index.
74 # speed4p-join3: Join two tables without an index.
75 #
76 # speed4p-view1: Querying a view.
77 # speed4p-table1: Same queries as in speed4p-view1, but run directly against
78 # the tables for comparison purposes.
79 #
80 # speed4p-subselect1: A SELECT statement that uses many sub-queries..
81 #
82 # speed4p-trigger1: An INSERT statement that fires a trigger.
83 # speed4p-trigger2: An UPDATE statement that fires a trigger.
84 # speed4p-trigger3: A DELETE statement that fires a trigger.
85 # speed4p-notrigger1: Same operation as trigger1, but without the trigger.
86 # speed4p-notrigger2: " trigger2 "
87 # speed4p-notrigger3: " trigger3 "
88 #
89  
90 # Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows.
91 # This creates a database of around 16MB.
92 execsql {
93 PRAGMA page_size=1024;
94 PRAGMA cache_size=8192;
95 PRAGMA locking_mode=EXCLUSIVE;
96 BEGIN;
97 CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
98 CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
99 CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
100  
101 CREATE VIEW v1 AS SELECT rowid, i, t FROM t1;
102 CREATE VIEW v2 AS SELECT rowid, i, t FROM t2;
103 CREATE VIEW v3 AS SELECT rowid, i, t FROM t3;
104 }
105 for {set jj 1} {$jj <= 3} {incr jj} {
106 set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}]
107 for {set ii 0} {$ii < 50000} {incr ii} {
108 set i [expr {int(rand()*50000)}]
109 set t [number_name $i]
110 execsql $stmt
111 }
112 }
113 execsql {
114 CREATE INDEX i1 ON t1(t);
115 CREATE INDEX i2 ON t2(t);
116 CREATE INDEX i3 ON t3(t);
117 COMMIT;
118 }
119  
120 # Before running these tests, disable the compiled statement cache built into
121 # the Tcl interface. This is because we want to test the speed of SQL
122 # compilation as well as execution.
123 #
124 db cache size 0
125  
126 # Join t1, t2, t3 on IPK.
127 set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid"
128 explain $sql
129 speed_trial speed4p-join1 50000 row $sql
130  
131 # Join t1, t2, t3 on the non-IPK index.
132 set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t"
133 explain $sql
134 speed_trial speed4p-join2 50000 row $sql
135  
136 # Run 10000 simple queries against the views.
137 set script {
138 for {set ii 1} {$ii < 10000} {incr ii} {
139 set v [expr {$ii*3}]
140 set t [expr {$ii%3+1}]
141 db eval "SELECT * FROM v$t WHERE rowid = \$v"
142 }
143 }
144 explain {SELECT * FROm v1 WHERE rowid=$v}
145 speed_trial_tcl speed4p-view1 10000 stmt $script
146  
147 # Run the same 10000 simple queries as in the previous test case against
148 # the underlying tables. The compiled vdbe programs should be identical, so
149 # the only difference in running time is the extra time taken to compile
150 # the view definitions.
151 #
152 set script {
153 for {set ii 1} {$ii < 10000} {incr ii} {
154 set v [expr {$ii*3}]
155 set t [expr {$ii%3+1}]
156 db eval "SELECT t FROM t$t WHERE rowid = \$v"
157 }
158 }
159 explain {SELECT * FROM t1 WHERE rowid=$v}
160 speed_trial_tcl speed4p-table1 10000 stmt $script
161  
162 # Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects.
163 #
164 set script {
165 for {set ii 1} {$ii < 10000} {incr ii} {
166 set v [expr {$ii*3}]
167 db eval {
168 SELECT (SELECT t FROM t1 WHERE rowid = $v),
169 (SELECT t FROM t2 WHERE rowid = $v),
170 (SELECT t FROM t3 WHERE rowid = $v)
171 }
172 }
173 }
174 explain {
175 SELECT (SELECT t FROM t1 WHERE rowid = $v),
176 (SELECT t FROM t2 WHERE rowid = $v),
177 (SELECT t FROM t3 WHERE rowid = $v)
178 }
179 speed_trial_tcl speed4p-subselect1 10000 stmt $script
180  
181 # The following block tests the speed of some DML statements that cause
182 # triggers to fire.
183 #
184 execsql {
185 CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT);
186 CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
187 CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN
188 INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t);
189 END;
190 CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN
191 INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t);
192 END;
193 CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN
194 INSERT INTO log VALUES('DELETE OF t4', old.rowid, old.i, old.t);
195 END;
196 BEGIN;
197 }
198 set list {}
199 for {set ii 1} {$ii < 10000} {incr ii} {
200 lappend list $ii [number_name $ii]
201 }
202 set script {
203 foreach {ii name} $::list {
204 db eval {INSERT INTO t4 VALUES(NULL, $ii, $name)}
205 }
206 }
207 explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}
208 speed_trial_tcl speed4p-trigger1 10000 stmt $script
209  
210 set list {}
211 for {set ii 1} {$ii < 20000} {incr ii 2} {
212 set ii2 [expr {$ii*2}]
213 lappend list $ii $ii2 [number_name $ii2]
214 }
215 set script {
216 foreach {ii ii2 name} $::list {
217 db eval {
218 UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;
219 }
220 }
221 }
222 explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}
223 speed_trial_tcl speed4p-trigger2 10000 stmt $script
224  
225 set script {
226 for {set ii 1} {$ii < 20000} {incr ii 2} {
227 db eval {DELETE FROM t4 WHERE rowid = $ii}
228 }
229 }
230 explain {DELETE FROM t4 WHERE rowid = $ii}
231 speed_trial_tcl speed4p-trigger3 10000 stmt $script
232 execsql {COMMIT}
233  
234 # The following block contains the same tests as the above block that
235 # tests triggers, with one crucial difference: no triggers are defined.
236 # So the difference in speed between these tests and the preceding ones
237 # is the amount of time taken to compile and execute the trigger programs.
238 #
239 execsql {
240 DROP TABLE t4;
241 DROP TABLE log;
242 VACUUM;
243 CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
244 BEGIN;
245 }
246 set list {}
247 for {set ii 1} {$ii < 10000} {incr ii} {
248 lappend list $ii [number_name $ii]
249 }
250 set script {
251 foreach {ii name} $::list {
252 db eval {INSERT INTO t4 VALUES(NULL, $ii, $name);}
253 }
254 }
255 explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}
256 speed_trial_tcl speed4p-notrigger1 10000 stmt $script
257  
258 set list {}
259 for {set ii 1} {$ii < 20000} {incr ii 2} {
260 set ii2 [expr {$ii*2}]
261 lappend list $ii $ii2 [number_name $ii2]
262 }
263 set script {
264 foreach {ii ii2 name} $::list {
265 db eval {
266 UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;
267 }
268 }
269 }
270 explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}
271 speed_trial_tcl speed4p-notrigger2 10000 stmt $script
272  
273 set script {
274 for {set ii 1} {$ii < 20000} {incr ii 2} {
275 db eval {DELETE FROM t4 WHERE rowid = $ii}
276 }
277 }
278 explain {DELETE FROM t4 WHERE rowid = $ii}
279 speed_trial_tcl speed4p-notrigger3 10000 stmt $script
280 execsql {COMMIT}
281  
282 speed_trial_summary speed4
283 finish_test