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third_party/sqlite/src/ext/fts3/fts3speed.tcl

Index: third_party/sqlite/src/ext/fts3/fts3speed.tcl
diff --git a/third_party/sqlite/src/ext/fts3/fts3speed.tcl b/third_party/sqlite/src/ext/fts3/fts3speed.tcl
new file mode 100644
index 0000000000000000000000000000000000000000..377cb196065699557b0a035a1e9d74808321187a
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+++ b/third_party/sqlite/src/ext/fts3/fts3speed.tcl
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+
+
+#--------------------------------------------------------------------------
+# This script contains several sub-programs used to test FTS3/FTS4 
+# performance. It does not run the queries directly, but generates SQL
+# scripts that can be run using the shell tool.
+#
+# The following cases are tested:
+#
+#   1. Inserting documents into an FTS3 table.
+#   2. Optimizing an FTS3 table (i.e. "INSERT INTO t1 VALUES('optimize')").
+#   3. Deleting documents from an FTS3 table.
+#   4. Querying FTS3 tables.
+#
+
+# Number of tokens in vocabulary. And number of tokens in each document.
+#
+set VOCAB_SIZE  2000
+set DOC_SIZE     100
+
+set NUM_INSERTS 100000
+set NUM_SELECTS 1000
+
+# Force everything in this script to be deterministic.
+#
+expr {srand(0)}
+
+proc usage {} {
+  puts stderr "Usage: $::argv0 <rows> <selects>"
+  exit -1
+}
+
+proc sql {sql} {
+  puts $::fd $sql
+}
+
+
+# Return a list of $nWord randomly generated tokens each between 2 and 10
+# characters in length.
+#
+proc build_vocab {nWord} {
+  set ret [list]
+  set chars [list a b c d e f g h i j k l m n o p q r s t u v w x y z]
+  for {set i 0} {$i<$nWord} {incr i} {
+    set len [expr {int((rand()*9.0)+2)}]
+    set term ""
+    for {set j 0} {$j<$len} {incr j} {
+      append term [lindex $chars [expr {int(rand()*[llength $chars])}]]
+    }
+    lappend ret $term
+  }
+  set ret
+}
+
+proc select_term {} {
+  set n [llength $::vocab]
+  set t [expr int(rand()*$n*3)]
+  if {$t>=2*$n} { set t [expr {($t-2*$n)/100}] }
+  if {$t>=$n} { set t [expr {($t-$n)/10}] }
+  lindex $::vocab $t
+}
+
+proc select_doc {nTerm} {
+  set ret [list]
+  for {set i 0} {$i<$nTerm} {incr i} {
+    lappend ret [select_term]
+  }
+  set ret
+}
+
+proc test_1 {nInsert} {
+  sql "PRAGMA synchronous = OFF;"
+  sql "DROP TABLE IF EXISTS t1;"
+  sql "CREATE VIRTUAL TABLE t1 USING fts4;"
+  for {set i 0} {$i < $nInsert} {incr i} {
+    set doc [select_doc $::DOC_SIZE]
+    sql "INSERT INTO t1 VALUES('$doc');"
+  }
+}
+
+proc test_2 {} {
+  sql "INSERT INTO t1(t1) VALUES('optimize');"
+}
+
+proc test_3 {nSelect} {
+  for {set i 0} {$i < $nSelect} {incr i} {
+    sql "SELECT count(*) FROM t1 WHERE t1 MATCH '[select_term]';"
+  }
+}
+
+proc test_4 {nSelect} {
+  for {set i 0} {$i < $nSelect} {incr i} {
+    sql "SELECT count(*) FROM t1 WHERE t1 MATCH '[select_term] [select_term]';"
+  }
+}
+
+if {[llength $argv]!=0} usage
+
+set ::vocab [build_vocab $::VOCAB_SIZE]
+
+set ::fd [open fts3speed_insert.sql w]
+test_1 $NUM_INSERTS
+close $::fd
+
+set ::fd [open fts3speed_select.sql w]
+test_3 $NUM_SELECTS
+close $::fd
+
+set ::fd [open fts3speed_select2.sql w]
+test_4 $NUM_SELECTS
+close $::fd
+
+set ::fd [open fts3speed_optimize.sql w]
+test_2
+close $::fd
+
+puts "Success. Created files:"
+puts "  fts3speed_insert.sql"
+puts "  fts3speed_select.sql"
+puts "  fts3speed_select2.sql"
+puts "  fts3speed_optimize.sql"
+