Created
September 16, 2022 20:30
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SpeechSynthesis memory leak (onEnd)?
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| <!doctype HTML> | |
| <html> | |
| <head> | |
| <title>SpeechSynthesis onEnd Counter</title> | |
| </head> | |
| <body> | |
| <h3>How long until the browser crashes?</h3> | |
| <p>On macOS Monterey 12.5.1 (16GB RAM), Chrome, Firefox and Safari all crash at some point (under 200 secs).</p> | |
| <button id="start">start</button> | |
| <button id="stop">stop</button> | |
| <p id="text"></p> | |
| <script> | |
| let count = 1 | |
| let timer = null | |
| let controller = new AbortController() | |
| const synth = window.speechSynthesis | |
| const utter = new SpeechSynthesisUtterance(count) | |
| const text = document.getElementById('text') | |
| const onUtterEnd = () => { | |
| count = count + 1 | |
| utter.text = count | |
| text.innerHTML = `<mark>${count}</mark>` | |
| synth.speak(utter) | |
| } | |
| const start = () => { | |
| text.innerHTML = `<mark>${count}</mark>` | |
| controller = new AbortController() | |
| utter.addEventListener('end', onUtterEnd, { signal: controller.signal }) | |
| synth.speak(utter) | |
| } | |
| const stop = () => { | |
| controller.abort() | |
| synth.cancel() | |
| } | |
| document.getElementById('start').addEventListener('click', start) | |
| document.getElementById('stop').addEventListener('click', stop) | |
| </script> | |
| </body> | |
| </html> |
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