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The variable deadCodeElimination is declared but not initialized, making it undefined by default. When using the &&= operator with an undefined left operand, the result will always remain undefined regardless of how many iterations run. ```js let deadCodeElimination; deadCodeElimination &&= true deadCodeElimination // undefined ``` PR-URL: https://github.com/nodejs/node/pull/59170 Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br> Reviewed-By: Chemi Atlow <chemi@atlow.co.il> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Edy Silva <edigleyssonsilva@gmail.com>
31 lines
661 B
JavaScript
31 lines
661 B
JavaScript
'use strict';
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const common = require('../common.js');
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const sqlite = require('node:sqlite');
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const assert = require('assert');
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const bench = common.createBenchmark(main, {
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n: [1e7],
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transaction: ['true', 'false'],
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});
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function main(conf) {
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const db = new sqlite.DatabaseSync(':memory:');
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if (conf.transaction === 'true') {
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db.exec('BEGIN');
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}
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let i;
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let deadCodeElimination = true;
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bench.start();
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for (i = 0; i < conf.n; i += 1)
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deadCodeElimination &&= db.isTransaction;
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bench.end(conf.n);
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assert.ok(deadCodeElimination === (conf.transaction === 'true'));
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if (conf.transaction === 'true') {
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db.exec('ROLLBACK');
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}
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}
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