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    <title>sqlite3 OPFS Worker concurrency tester</title>
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    <p>
      OPFS concurrency tester using multiple independent Workers.
      Disclaimer: concurrency in OPFS is currently a pain point!
    </p>
    <p>
      URL flags: pass a number of workers using
      the <code>workers=N</code> URL flag. Set the time between each
      workload with <code>interval=N</code> (milliseconds). Set the
      number of worker iterations with <code>iterations=N</code>.
      Enable OPFS VFS verbosity with <code>verbose=1-3</code> (output
      goes to the dev console). Disable/enable "unlock ASAP" mode
      (higher concurrency, lower speed) with <code>unlock-asap=0-1</code>.
    </p>
    <p>Achtung: if it does not start to do anything within a couple of
      seconds, check the dev console: Chrome sometimes fails to load
      the wasm module due to "cannot allocate WasmMemory." Closing and
      re-opening the tab usually resolves it, but sometimes restarting
      the browser is required.
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