Annotation of embedaddon/sqlite3/test/speed1p.explain, revision 1.1
1.1 ! misho 1: # 2008 March 21
! 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.
! 13: #
! 14: # This is a copy of speed1.test modified to user prepared statements.
! 15: #
! 16: # $Id: speed1p.explain,v 1.1 2008/04/16 12:57:48 drh Exp $
! 17: #
! 18:
! 19: set testdir [file dirname $argv0]
! 20: source $testdir/tester.tcl
! 21: speed_trial_init speed1
! 22:
! 23: # Set a uniform random seed
! 24: expr srand(0)
! 25:
! 26: set sqlout [open speed1.txt w]
! 27: proc tracesql {sql} {
! 28: puts $::sqlout $sql\;
! 29: }
! 30: #db trace tracesql
! 31:
! 32: # The number_name procedure below converts its argment (an integer)
! 33: # into a string which is the English-language name for that number.
! 34: #
! 35: # Example:
! 36: #
! 37: # puts [number_name 123] -> "one hundred twenty three"
! 38: #
! 39: set ones {zero one two three four five six seven eight nine
! 40: ten eleven twelve thirteen fourteen fifteen sixteen seventeen
! 41: eighteen nineteen}
! 42: set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
! 43: proc number_name {n} {
! 44: if {$n>=1000} {
! 45: set txt "[number_name [expr {$n/1000}]] thousand"
! 46: set n [expr {$n%1000}]
! 47: } else {
! 48: set txt {}
! 49: }
! 50: if {$n>=100} {
! 51: append txt " [lindex $::ones [expr {$n/100}]] hundred"
! 52: set n [expr {$n%100}]
! 53: }
! 54: if {$n>=20} {
! 55: append txt " [lindex $::tens [expr {$n/10}]]"
! 56: set n [expr {$n%10}]
! 57: }
! 58: if {$n>0} {
! 59: append txt " [lindex $::ones $n]"
! 60: }
! 61: set txt [string trim $txt]
! 62: if {$txt==""} {set txt zero}
! 63: return $txt
! 64: }
! 65:
! 66: # Create a database schema.
! 67: #
! 68: do_test speed1p-1.0 {
! 69: execsql {
! 70: PRAGMA page_size=1024;
! 71: PRAGMA cache_size=8192;
! 72: PRAGMA locking_mode=EXCLUSIVE;
! 73: CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
! 74: CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT);
! 75: CREATE INDEX i2a ON t2(a);
! 76: CREATE INDEX i2b ON t2(b);
! 77: }
! 78: execsql {
! 79: SELECT name FROM sqlite_master ORDER BY 1;
! 80: }
! 81: } {i2a i2b t1 t2}
! 82:
! 83:
! 84: # 50000 INSERTs on an unindexed table
! 85: #
! 86: set list {}
! 87: for {set i 1} {$i<=50000} {incr i} {
! 88: set r [expr {int(rand()*500000)}]
! 89: set x [number_name $r]
! 90: lappend list $i $r $x
! 91: }
! 92: set script {
! 93: foreach {i r x} $::list {
! 94: db eval {INSERT INTO t1 VALUES($i,$r,$x)}
! 95: }
! 96: }
! 97: explain {INSERT INTO t1 VALUES($i,$r,$x)}
! 98: db eval BEGIN
! 99: speed_trial_tcl speed1p-insert1 50000 row $script
! 100: db eval COMMIT
! 101:
! 102: # 50000 INSERTs on an indexed table
! 103: #
! 104: set list {}
! 105: for {set i 1} {$i<=50000} {incr i} {
! 106: set r [expr {int(rand()*500000)}]
! 107: set x [number_name $r]
! 108: lappend list $i $r $x
! 109: }
! 110: set script {
! 111: foreach {i r x} $::list {
! 112: db eval {INSERT INTO t2 VALUES($i,$r,$x)}
! 113: }
! 114: }
! 115: explain {INSERT INTO t2 VALUES($i,$r,$x)}
! 116: db eval BEGIN
! 117: speed_trial_tcl speed1p-insert2 50000 row $script
! 118: db eval COMMIT
! 119:
! 120:
! 121:
! 122: # 50 SELECTs on an integer comparison. There is no index so
! 123: # a full table scan is required.
! 124: #
! 125: set list {}
! 126: for {set i 0} {$i<50} {incr i} {
! 127: set lwr [expr {$i*100}]
! 128: set upr [expr {($i+10)*100}]
! 129: lappend list $lwr $upr
! 130: }
! 131: set script {
! 132: foreach {lwr upr} $::list {
! 133: db eval {SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr}
! 134: }
! 135: }
! 136: explain {SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr}
! 137: db eval BEGIN
! 138: speed_trial_tcl speed1p-select1 [expr {50*50000}] row $script
! 139: db eval COMMIT
! 140:
! 141: # 50 SELECTs on an LIKE comparison. There is no index so a full
! 142: # table scan is required.
! 143: #
! 144: set list {}
! 145: for {set i 0} {$i<50} {incr i} {
! 146: lappend list "%[number_name $i]%"
! 147: }
! 148: set script {
! 149: foreach pattern $::list {
! 150: db eval {SELECT count(*), avg(b) FROM t1 WHERE c LIKE $pattern}
! 151: }
! 152: }
! 153: explain {SELECT count(*), avg(b) FROM t1 WHERE c LIKE $pattern}
! 154: db eval BEGIN
! 155: speed_trial_tcl speed1p-select2 [expr {50*50000}] row $script
! 156: db eval COMMIT
! 157:
! 158: # Create indices
! 159: #
! 160: explain {CREATE INDEX i1a ON t1(a)}
! 161: explain {CREATE INDEX i1b ON t1(b)}
! 162: db eval BEGIN
! 163: speed_trial speed1p-createidx 150000 row {
! 164: CREATE INDEX i1a ON t1(a);
! 165: CREATE INDEX i1b ON t1(b);
! 166: CREATE INDEX i1c ON t1(c);
! 167: }
! 168: db eval COMMIT
! 169:
! 170: # 5000 SELECTs on an integer comparison where the integer is
! 171: # indexed.
! 172: #
! 173: set list {}
! 174: for {set i 0} {$i<5000} {incr i} {
! 175: set lwr [expr {$i*100}]
! 176: set upr [expr {($i+10)*100}]
! 177: lappend list $lwr $upr
! 178: }
! 179: set script {
! 180: foreach {lwr upr} $::list {
! 181: db eval {SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr}
! 182: }
! 183: }
! 184: explain {SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr}
! 185: db eval BEGIN
! 186: speed_trial_tcl speed1p-select3 5000 stmt $script
! 187: db eval COMMIT
! 188:
! 189: # 100000 random SELECTs against rowid.
! 190: #
! 191: set list {}
! 192: for {set i 1} {$i<=100000} {incr i} {
! 193: set id [expr {int(rand()*50000)+1}]
! 194: lappend list $id
! 195: }
! 196: set script {
! 197: foreach id $::list {
! 198: db eval {SELECT c FROM t1 WHERE rowid=$id}
! 199: }
! 200: }
! 201: explain {SELECT c FROM t1 WHERE rowid=$id}
! 202: db eval BEGIN
! 203: speed_trial_tcl speed1p-select4 100000 row $script
! 204: db eval COMMIT
! 205:
! 206: # 100000 random SELECTs against a unique indexed column.
! 207: #
! 208: set list {}
! 209: for {set i 1} {$i<=100000} {incr i} {
! 210: set id [expr {int(rand()*50000)+1}]
! 211: lappend list $id
! 212: }
! 213: set script {
! 214: foreach id $::list {
! 215: db eval {SELECT c FROM t1 WHERE a=$id}
! 216: }
! 217: }
! 218: explain {SELECT c FROM t1 WHERE a=$id}
! 219: db eval BEGIN
! 220: speed_trial_tcl speed1p-select5 100000 row $script
! 221: db eval COMMIT
! 222:
! 223: # 50000 random SELECTs against an indexed column text column
! 224: #
! 225: set list [db eval {SELECT c FROM t1 ORDER BY random() LIMIT 50000}]
! 226: set script {
! 227: foreach c $::list {
! 228: db eval {SELECT c FROM t1 WHERE c=$c}
! 229: }
! 230: }
! 231: explain {SELECT c FROM t1 WHERE c=$c}
! 232: db eval BEGIN
! 233: speed_trial_tcl speed1p-select6 50000 row $script
! 234: db eval COMMIT
! 235:
! 236:
! 237: # Vacuum
! 238: speed_trial speed1p-vacuum 100000 row VACUUM
! 239:
! 240: # 5000 updates of ranges where the field being compared is indexed.
! 241: #
! 242: set list {}
! 243: for {set i 0} {$i<5000} {incr i} {
! 244: set lwr [expr {$i*2}]
! 245: set upr [expr {($i+1)*2}]
! 246: lappend list $lwr $upr
! 247: }
! 248: set script {
! 249: foreach {lwr upr} $::list {
! 250: db eval {UPDATE t1 SET b=b*2 WHERE a>=$lwr AND a<$upr}
! 251: }
! 252: }
! 253: explain {UPDATE t1 SET b=b*2 WHERE a>=$lwr AND a<$upr}
! 254: db eval BEGIN
! 255: speed_trial_tcl speed1p-update1 5000 stmt $script
! 256: db eval COMMIT
! 257:
! 258: # 50000 single-row updates. An index is used to find the row quickly.
! 259: #
! 260: set list {}
! 261: for {set i 0} {$i<50000} {incr i} {
! 262: set r [expr {int(rand()*500000)}]
! 263: lappend list $i $r
! 264: }
! 265: set script {
! 266: foreach {i r} $::list {
! 267: db eval {UPDATE t1 SET b=$r WHERE a=$i}
! 268: }
! 269: }
! 270: explain {UPDATE t1 SET b=$r WHERE a=$i}
! 271: db eval BEGIN
! 272: speed_trial_tcl speed1p-update2 50000 row $script
! 273: db eval COMMIT
! 274:
! 275: # 1 big text update that touches every row in the table.
! 276: #
! 277: explain {UPDATE t1 SET c=a}
! 278: speed_trial speed1p-update3 50000 row {
! 279: UPDATE t1 SET c=a;
! 280: }
! 281:
! 282: # Many individual text updates. Each row in the table is
! 283: # touched through an index.
! 284: #
! 285: set list {}
! 286: for {set i 1} {$i<=50000} {incr i} {
! 287: set r [expr {int(rand()*500000)}]
! 288: lappend list $i [number_name $r]
! 289: }
! 290: set script {
! 291: foreach {i x} $::list {
! 292: db eval {UPDATE t1 SET c=$x WHERE a=$i}
! 293: }
! 294: }
! 295: explain {UPDATE t1 SET c=$x WHERE a=$i}
! 296: db eval BEGIN
! 297: speed_trial_tcl speed1p-update4 50000 row $script
! 298: db eval COMMIT
! 299:
! 300: # Delete all content in a table.
! 301: #
! 302: explain {DELETE FROM t1}
! 303: speed_trial speed1p-delete1 50000 row {DELETE FROM t1}
! 304:
! 305: # Copy one table into another
! 306: #
! 307: explain {INSERT INTO t1 SELECT * FROM t2}
! 308: speed_trial speed1p-copy1 50000 row {INSERT INTO t1 SELECT * FROM t2}
! 309:
! 310: # Delete all content in a table, one row at a time.
! 311: #
! 312: explain {DELETE FROM t1 WHERE 1}
! 313: speed_trial speed1p-delete2 50000 row {DELETE FROM t1 WHERE 1}
! 314:
! 315: # Refill the table yet again
! 316: #
! 317: speed_trial speed1p-copy2 50000 row {INSERT INTO t1 SELECT * FROM t2}
! 318:
! 319: # Drop the table and recreate it without its indices.
! 320: #
! 321: explain {DROP TABLE t1}
! 322: explain {CREATE TABLE tX(a INTEGER, b INTEGER, c TEXT)}
! 323: db eval BEGIN
! 324: speed_trial speed1p-drop1 50000 row {
! 325: DROP TABLE t1;
! 326: CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
! 327: }
! 328: db eval COMMIT
! 329:
! 330: # Refill the table yet again. This copy should be faster because
! 331: # there are no indices to deal with.
! 332: #
! 333: speed_trial speed1p-copy3 50000 row {INSERT INTO t1 SELECT * FROM t2}
! 334:
! 335: # Select 20000 rows from the table at random.
! 336: #
! 337: explain {SELECT rowid FROM t1 ORDER BY random() LIMIT 20000}
! 338: speed_trial speed1p-random1 50000 row {
! 339: SELECT rowid FROM t1 ORDER BY random() LIMIT 20000
! 340: }
! 341:
! 342: # Delete 20000 random rows from the table.
! 343: #
! 344: explain {DELETE FROM t1 WHERE rowid IN
! 345: (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000)}
! 346: speed_trial speed1p-random-del1 20000 row {
! 347: DELETE FROM t1 WHERE rowid IN
! 348: (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000)
! 349: }
! 350: do_test speed1p-1.1 {
! 351: db one {SELECT count(*) FROM t1}
! 352: } 30000
! 353:
! 354:
! 355: # Delete 20000 more rows at random from the table.
! 356: #
! 357: speed_trial speed1p-random-del2 20000 row {
! 358: DELETE FROM t1 WHERE rowid IN
! 359: (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000)
! 360: }
! 361: do_test speed1p-1.2 {
! 362: db one {SELECT count(*) FROM t1}
! 363: } 10000
! 364: speed_trial_summary speed1
! 365:
! 366: finish_test
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