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minimal-preact-measure
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import { options } from "preact"; | |
function getComponentName(vnode) { | |
return vnode.type.displayName || vnode.name || "Component"; | |
} | |
let prevBeforeDiff = (options._diff = options.__b); | |
options._diff = options.__b = (vnode) => { | |
if (typeof vnode.type === "function") { | |
const name = getComponentName(vnode); | |
performance.mark(name); | |
} | |
if (prevBeforeDiff) prevBeforeDiff(vnode); | |
}; | |
let prevDiffed = options.diffed; | |
options.diffed = options.__b = (vnode) => { | |
if (typeof vnode.type === "function") { | |
const name = getComponentName(vnode); | |
const start = `${name}_diff`; | |
const end = `${name}_diffed`; | |
if (performance.getEntriesByName(start).length > 0) { | |
performance.mark(end); | |
performance.measure(name, start, end); | |
} | |
performance.clearMarks(start); | |
performance.clearMarks(end); | |
performance.clearMeasures(name); | |
} | |
if (prevDiffed) prevDiffed(vnode); | |
}; |
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