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| 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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