tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

test_multipleOpensInSequence.js (2373B)

      1 /*
      2  Any copyright is dedicated to the Public Domain.
      3  http://creativecommons.org/publicdomain/zero/1.0/
      4 */
      5 
      6 const { PrincipalUtils } = ChromeUtils.importESModule(
      7  "resource://testing-common/dom/quota/test/modules/PrincipalUtils.sys.mjs"
      8 );
      9 const { IndexedDBUtils } = ChromeUtils.importESModule(
     10  "resource://testing-common/dom/indexedDB/test/modules/IndexedDBUtils.sys.mjs"
     11 );
     12 
     13 /**
     14 * This is not a formal performance test — see the dedicated perf tests for
     15 * actual metrics.
     16 *
     17 * This test exists to:
     18 *   - Provide fast, local verification during development.
     19 *   - May detect early regressions in scheduling logic before perf test
     20 *     results are available.
     21 *
     22 * It simulates multiple open requests to the same database, issued one after
     23 * another. Only one should run at a time, and each should start promptly after
     24 * the previous finishes.
     25 *
     26 * If scheduling or cleanup is slow, this test may fail due to timeout.
     27 *
     28 * Note: Not only the number of requests, but also the number of live (open)
     29 * databases may affect performance.
     30 *
     31 * Note: This test could theoretically be combined with its counterpart in a
     32 * single file with multiple tasks, but they are intentionally split to:
     33 *   - Avoid interference between test cases
     34 *   - Make it obvious which scenario timed out (serial vs. parallel)
     35 */
     36 
     37 /* exported testSteps */
     38 async function testSteps() {
     39  const principal = PrincipalUtils.createPrincipal("https://example.com");
     40  const name = "multipleOpensInSequence";
     41 
     42  info("Opening databases");
     43 
     44  {
     45    const startTime = ChromeUtils.now();
     46 
     47    const databases = [];
     48 
     49    for (let index = 0; index < 1000; index++) {
     50      const request = indexedDB.openForPrincipal(principal, name);
     51      const database = await IndexedDBUtils.requestFinished(request);
     52      databases.push(database);
     53    }
     54 
     55    for (const database of databases) {
     56      database.close();
     57    }
     58 
     59    const endTime = ChromeUtils.now();
     60 
     61    const timeDelta = endTime - startTime;
     62 
     63    info(`Opened databases in ${timeDelta} msec`);
     64  }
     65 
     66  info("Deleting database");
     67 
     68  {
     69    const startTime = ChromeUtils.now();
     70 
     71    const request = indexedDB.deleteForPrincipal(principal, name);
     72    await IndexedDBUtils.requestFinished(request);
     73 
     74    const endTime = ChromeUtils.now();
     75 
     76    const timeDelta = endTime - startTime;
     77 
     78    info(`Deleted database in ${timeDelta} msec`);
     79  }
     80 }