33 lines
821 B
JavaScript
33 lines
821 B
JavaScript
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// Duration of your trace, in milliseconds
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let TRACE_LENGTH;
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// Array of length TRACE_LENGTH with your trace's values
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let T;
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// Value of performance.now() when you started recording your trace
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let start;
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function record() {
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// Create empty array for saving trace values
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T = new Array(TRACE_LENGTH);
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// Fill array with -1 so we can be sure memory is allocated
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T.fill(-1, 0, T.length);
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// Save start timestamp
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start = performance.now();
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// TODO (Exercise 3): Record data for TRACE_LENGTH seconds and save values to T.
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// Once done recording, send result to main thread
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postMessage(JSON.stringify(T));
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}
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// DO NOT MODIFY BELOW THIS LINE -- PROVIDED BY COURSE STAFF
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self.onmessage = (e) => {
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if (e.data.type === "start") {
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TRACE_LENGTH = e.data.trace_length;
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setTimeout(record, 0);
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}
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};
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