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2023-09-14 12:53:30 -07:00 · 2023-09-14 12:53:30 -07:00 · 04e0dd6a44
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 <!DOCTYPE html>
 <html>
    <head>
        <meta charset="utf-8">
        <title>Massive memory allocation test</title>
    </head>
    <h1>
        <h1>Massive memory allocation test</h1>
        <p>
            Allocates 16-MiB ArrayBuffers until something stops it.
            May crash your system or make it sluggish.
        </p>
        <div id="status">Ready to start.</div>
        <div><button id="start">Start</button></div>
        <script async>
            function el(id) {
                return document.getElementById(id);
            }
            const status = el('status');
            const button = el('start');
            let running = false;
            let count = 0;
            // Give us 16 megs of randomized memory
            // to defeat compression.
            const mib = 1024 * 1024;
            const chunk = 16 * mib;
            const block = new Uint8Array(chunk);
            for (let i = 0; i < block.length; i++) {
                block[i] = Math.round(Math.random() * 255);
            }
            let blocks = [];
            function alloc() {
                blocks.push(block.slice());
                count++;
                status.textContent = `${count * chunk / mib} MiB allocated`;
            }
            let timeout = null;
            function schedule() {
                timeout = setTimeout(() => {
                    alloc();
                    schedule();
                });
            }
            function cancel() {
                clearTimeout(timeout);
                timeout = null;
            }
            button.addEventListener('click', function(event) {
                if (running) {
                    button.textContent = 'Start';
                    running = false;
                    cancel();
                } else {
                    button.textContent = 'Stop';
                    running = true;
                    schedule();
                }
            });
        </script>
    </body>
 </html>