benchmark: add sqlite prepare select all

Author: H4ad

benchmark/sqlite/sqlite-prepare-select-all.js

@@ -0,0 +1,61 @@
+'use strict';
+const common = require('../common.js');
+const sqlite = require('node:sqlite');
+const assert = require('assert');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+  tableSeedSize: [1e5],
+  statement: [
+    'SELECT 1',
+    'SELECT * FROM foo LIMIT 1',
+    'SELECT * FROM foo LIMIT 100',
+    'SELECT text_column FROM foo LIMIT 1',
+    'SELECT text_column FROM foo LIMIT 100',
+    'SELECT text_column, integer_column FROM foo LIMIT 1',
+    'SELECT text_column, integer_column FROM foo LIMIT 100',
+    'SELECT text_column, integer_column, real_column FROM foo LIMIT 1',
+    'SELECT text_column, integer_column, real_column FROM foo LIMIT 100',
+    'SELECT text_column, integer_column, real_column, blob_column FROM foo LIMIT 1',
+    'SELECT text_column, integer_column, real_column, blob_column FROM foo LIMIT 100',
+    'SELECT text_8kb_column FROM foo_large LIMIT 1',
+    'SELECT text_8kb_column FROM foo_large LIMIT 100',
+  ],
+});
+
+function main(conf) {
+  const db = new sqlite.DatabaseSync(':memory:');
+
+  db.exec('CREATE TABLE foo (text_column TEXT, integer_column INTEGER, real_column REAL, blob_column BLOB)');
+  const fooInsertStatement = db.prepare(
+    'INSERT INTO foo (text_column, integer_column, real_column, blob_column) VALUES (?, ?, ?, ?)',
+  );
+
+  for (let i = 0; i < conf.tableSeedSize; i++) {
+    fooInsertStatement.run(
+      crypto.randomUUID(),
+      Math.floor(Math.random() * 100),
+      Math.random(),
+      Buffer.from('example blob data'),
+    );
+  }
+
+  db.exec('CREATE TABLE foo_large (text_8kb_column TEXT)');
+  const fooLargeInsertStatement = db.prepare('INSERT INTO foo_large (text_8kb_column) VALUES (?)');
+  const largeText = 'a'.repeat(8 * 1024);
+  for (let i = 0; i < conf.tableSeedSize; i++) {
+    fooLargeInsertStatement.run(largeText);
+  }
+
+  let i;
+  let deadCodeElimination;
+
+  const stmt = db.prepare(conf.statement);
+
+  bench.start();
+  for (i = 0; i < conf.n; i += 1)
+    deadCodeElimination = stmt.all();
+  bench.end(conf.n);
+
+  assert.ok(deadCodeElimination !== undefined);
+}