mozilla-central/dom/indexedDB/test/unit/test_multipleOpensInParallel.js (file symbol)

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Test Info: Warnings

/*
Any copyright is dedicated to the Public Domain.
*/
const { PrincipalUtils } = ChromeUtils.importESModule(
);
const { IndexedDBUtils } = ChromeUtils.importESModule(
);
/**
* This is not a formal performance test — see the dedicated perf tests for
* actual metrics.
*
* This test exists to:
* - Provide fast, local verification during development.
* - May detect early regressions in scheduling logic before perf test
* results are available.
*
* It simulates multiple concurrent open requests to the same database. Only
* one should run at a time, and the rest should be scheduled efficiently.
*
* If scheduling or cleanup is slow, this test may fail due to timeout.
*
* Note: Not only the number of requests, but also the number of live (open)
* databases may affect performance.
*
* Note: This test could theoretically be combined with its counterpart in a
* single file with multiple tasks, but they are intentionally split to:
* - Avoid interference between test cases
* - Make it obvious which scenario timed out (serial vs. parallel)
*/
/* exported testSteps */
async function testSteps() {
const principal = PrincipalUtils.createPrincipal("https://example.com");
const name = "multipleOpensInParallel";
info("Opening databases");
{
const startTime = Cu.now();
const openPromises = [];
for (let index = 0; index < 1000; index++) {
const request = indexedDB.openForPrincipal(principal, name);
const openPromise = IndexedDBUtils.requestFinished(request);
openPromises.push(openPromise);
}
const databases = await Promise.all(openPromises);
for (const database of databases) {
database.close();
}
const endTime = Cu.now();
const timeDelta = endTime - startTime;
info(`Opened databases in ${timeDelta} msec`);
}
info("Deleting database");
{
const startTime = Cu.now();
const request = indexedDB.deleteForPrincipal(principal, name);
await IndexedDBUtils.requestFinished(request);
const endTime = Cu.now();
const timeDelta = endTime - startTime;
info(`Deleted database in ${timeDelta} msec`);
}
}