mirror of
https://github.com/multipleof4/lynchmark.git
synced 2026-01-14 08:37:56 +00:00
21 lines
777 B
JavaScript
21 lines
777 B
JavaScript
async function createStreamVisualizer(iterable,options={}){
|
|
const{maxPoints=100,alpha=.3,width=640,height=320,yDomain=[0,1]}=options
|
|
const{scaleLinear,line}=await import('https://cdn.jsdelivr.net/npm/d3@7/+esm')
|
|
const data=[]
|
|
let ema
|
|
for await(const{timestamp,value}of iterable){
|
|
ema=ema==null?value:alpha*value+(1-alpha)*ema
|
|
data.push({timestamp,value,ema})
|
|
data.length>maxPoints&&data.shift()
|
|
}
|
|
let path=''
|
|
if(data.length){
|
|
const x=scaleLinear().domain([data[0].timestamp,data.at(-1).timestamp]).range([0,width])
|
|
const y=scaleLinear().domain(yDomain).range([height,0])
|
|
path=line().x(d=>x(d.timestamp)).y(d=>y(d.ema))(data)||''
|
|
}
|
|
return{data,path}
|
|
}
|
|
export default createStreamVisualizer;
|
|
// Generation time: 10.093s
|
|
// Result: PASS
|