mirror of
https://github.com/multipleof4/lynchmark.git
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19 lines
753 B
JavaScript
19 lines
753 B
JavaScript
const createStreamVisualizer = async (iterable, { maxPoints, alpha, width, height, yDomain }) => {
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const d3 = await import('https://cdn.jsdelivr.net/npm/d3@7/+esm');
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const data = [];
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let ema;
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for await (const { timestamp, value } of iterable) {
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ema = ema === undefined ? value : alpha * value + (1 - alpha) * ema;
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data.push({ timestamp, value, ema });
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if (data.length > maxPoints) data.shift();
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}
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const x = d3.scaleLinear().domain([data[0].timestamp, data.at(-1).timestamp]).range([0, width]);
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const y = d3.scaleLinear().domain(yDomain).range([height, 0]);
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return { data, path: d3.line().x(d => x(d.timestamp)).y(d => y(d.ema))(data) };
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};
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export default createStreamVisualizer;
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// Generation time: 86.368s
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// Result: PASS
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