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+# 2007 October 23
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is measuring executing speed. More specifically,
+# the focus is on the speed of:
+#
+#   * joins
+#   * views
+#   * sub-selects
+#   * triggers
+#
+# $Id: speed4.test,v 1.2 2008/07/12 14:52:20 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+speed_trial_init speed1
+
+# Set a uniform random seed
+expr srand(0)
+
+set sqlout [open speed1.txt w]
+proc tracesql {sql} {
+  puts $::sqlout $sql\;
+}
+#db trace tracesql
+
+# The number_name procedure below converts its argment (an integer)
+# into a string which is the English-language name for that number.
+#
+# Example:
+#
+#     puts [number_name 123]   ->  "one hundred twenty three"
+#
+set ones {zero one two three four five six seven eight nine
+          ten eleven twelve thirteen fourteen fifteen sixteen seventeen
+          eighteen nineteen}
+set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
+proc number_name {n} {
+  if {$n>=1000} {
+    set txt "[number_name [expr {$n/1000}]] thousand"
+    set n [expr {$n%1000}]
+  } else {
+    set txt {}
+  }
+  if {$n>=100} {
+    append txt " [lindex $::ones [expr {$n/100}]] hundred"
+    set n [expr {$n%100}]
+  }
+  if {$n>=20} {
+    append txt " [lindex $::tens [expr {$n/10}]]"
+    set n [expr {$n%10}]
+  }
+  if {$n>0} {
+    append txt " [lindex $::ones $n]"
+  }
+  set txt [string trim $txt]
+  if {$txt==""} {set txt zero}
+  return $txt
+}
+
+# Summary of tests:
+#
+#   speed4-join1: Join three tables using IPK index.
+#   speed4-join2: Join three tables using an index.
+#   speed4-join3: Join two tables without an index.
+#
+#   speed4-view1:  Querying a view.
+#   speed4-table1: Same queries as in speed4-view1, but run directly against
+#                  the tables for comparison purposes.
+#
+#   speed4-subselect1: A SELECT statement that uses many sub-queries..
+#
+#   speed4-trigger1: An INSERT statement that fires a trigger.
+#   speed4-trigger2: An UPDATE statement that fires a trigger.
+#   speed4-trigger3: A DELETE statement that fires a trigger.
+#   speed4-notrigger1: Same operation as trigger1, but without the trigger.
+#   speed4-notrigger2:        "          trigger2           "
+#   speed4-notrigger3:        "          trigger3           "
+#
+
+# Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows.
+# This creates a database of around 16MB.
+execsql {
+  BEGIN;
+  CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
+  CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
+  CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
+
+  CREATE VIEW v1 AS SELECT rowid, i, t FROM t1;
+  CREATE VIEW v2 AS SELECT rowid, i, t FROM t2;
+  CREATE VIEW v3 AS SELECT rowid, i, t FROM t3;
+}
+for {set jj 1} {$jj <= 3} {incr jj} {
+  set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}]
+  for {set ii 0} {$ii < 50000} {incr ii} {
+    set i [expr {int(rand()*50000)}]
+    set t [number_name $i]
+    execsql $stmt
+  }
+}
+execsql {
+  CREATE INDEX i1 ON t1(t);
+  CREATE INDEX i2 ON t2(t);
+  CREATE INDEX i3 ON t3(t);
+  COMMIT;
+}
+
+# Before running these tests, disable the compiled statement cache built into
+# the Tcl interface. This is because we want to test the speed of SQL
+# compilation as well as execution.
+#
+db cache size 0
+
+# Join t1, t2, t3 on IPK.
+set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid"
+speed_trial speed4-join1 50000 row $sql
+
+# Join t1, t2, t3 on the non-IPK index.
+set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t"
+speed_trial speed4-join2 50000 row $sql
+
+# Run 10000 simple queries against the views.
+set sql ""
+for {set ii 1} {$ii < 10000} {incr ii} {
+  append sql "SELECT * FROM v[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];"
+}
+speed_trial speed4-view1 10000 stmt $sql
+
+# Run the same 10000 simple queries as in the previous test case against
+# the underlying tables. The compiled vdbe programs should be identical, so
+# the only difference in running time is the extra time taken to compile
+# the view definitions.
+#
+set sql ""
+for {set ii 1} {$ii < 10000} {incr ii} {
+  append sql "SELECT t FROM t[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];"
+}
+speed_trial speed4-table1 10000 stmt $sql
+
+# Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects.
+#
+set sql ""
+for {set ii 1} {$ii < 10000} {incr ii} {
+  append sql "
+    SELECT (SELECT t FROM t1 WHERE rowid = [expr {$ii*3}]), 
+           (SELECT t FROM t2 WHERE rowid = [expr {$ii*3}]), 
+           (SELECT t FROM t3 WHERE rowid = [expr {$ii*3}])
+  ;"
+}
+speed_trial speed4-subselect1 10000 stmt $sql
+
+# The following block tests the speed of some DML statements that cause
+# triggers to fire.
+#
+execsql {
+  CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT);
+  CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
+  CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN
+    INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t);
+  END;
+  CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN
+    INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t);
+  END;
+  CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN
+    INSERT INTO log VALUES('DELETE OF t4', old.rowid, old.i, old.t);
+  END;
+  BEGIN;
+}
+set sql ""
+for {set ii 1} {$ii < 10000} {incr ii} {
+  append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');"
+}
+speed_trial speed4-trigger1 10000 stmt $sql
+set sql ""
+for {set ii 1} {$ii < 20000} {incr ii 2} {
+  set ii2 [expr {$ii*2}]
+  append sql "
+    UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii;
+  "
+}
+speed_trial speed4-trigger2 10000 stmt $sql
+set sql ""
+for {set ii 1} {$ii < 20000} {incr ii 2} {
+  append sql "DELETE FROM t4 WHERE rowid = $ii;"
+}
+speed_trial speed4-trigger3 10000 stmt $sql
+execsql {COMMIT}
+
+# The following block contains the same tests as the above block that
+# tests triggers, with one crucial difference: no triggers are defined.
+# So the difference in speed between these tests and the preceding ones
+# is the amount of time taken to compile and execute the trigger programs.
+#
+execsql {
+  DROP TABLE t4;
+  DROP TABLE log;
+  VACUUM;
+  CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);
+  BEGIN;
+}
+set sql ""
+for {set ii 1} {$ii < 10000} {incr ii} {
+  append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');"
+}
+speed_trial speed4-notrigger1 10000 stmt $sql
+set sql ""
+for {set ii 1} {$ii < 20000} {incr ii 2} {
+  set ii2 [expr {$ii*2}]
+  append sql "
+    UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii;
+  "
+}
+speed_trial speed4-notrigger2 10000 stmt $sql
+set sql ""
+for {set ii 1} {$ii < 20000} {incr ii 2} {
+  append sql "DELETE FROM t4 WHERE rowid = $ii;"
+}
+speed_trial speed4-notrigger3 10000 stmt $sql
+execsql {COMMIT}
+
+speed_trial_summary speed4
+finish_test