Function estimateFinish

site/src/pages/WorkspacePage/WorkspaceBuildProgress.tsx:34–62

(
	startedAt: Dayjs,
	p50: number,
	p95: number,
)

};

const estimateFinish = (
	startedAt: Dayjs,
	p50: number,
	p95: number,
): [number | undefined, string] => {
	const sinceStart = dayjs().diff(startedAt);
	const secondsLeft = (est: number) => {
		const max = Math.max(
			Math.ceil(dayjs.duration((1 - sinceStart / est) * est).asSeconds()),
			0,
		);
		return Number.isNaN(max) ? 0 : max;
	};

	// Under-promise, over-deliver with the 95th percentile estimate.
	const highGuess = secondsLeft(p95);

	const anyMomentNow: [number | undefined, string] = [
		undefined,
		"Any moment now...",
	];

	const p50percent = (sinceStart * 100) / p50;
	if (highGuess <= 0) {
		return anyMomentNow;
	}

	return [p50percent, `Up to ${highGuess} seconds remaining...`];
};

interface WorkspaceBuildProgressProps {
	workspace: Workspace;