Function selectByLatency

site/src/contexts/ProxyContext.tsx:245–269

(
	proxies: readonly Region[],
	latencies?: Record<string, ProxyLatencyReport>,
)

};

const selectByLatency = (
	proxies: readonly Region[],
	latencies?: Record<string, ProxyLatencyReport>,
): Region | undefined => {
	if (!latencies) {
		return undefined;
	}

	const proxyMap = Object.fromEntries(proxies.map((it) => [it.id, it]));
	const best = Object.entries(latencies)
		.map(([proxyId, latency]) => ({ id: proxyId, ...latency }))
		// If the proxy is not in our list, or it is unhealthy, ignore it.
		.filter((latency) => proxyMap[latency.id]?.healthy)
		.sort((a, b) => a.latencyMS - b.latencyMS)
		.at(0);

	// Found a new best, use it!
	if (best) {
		const bestProxy = proxies.find((proxy) => proxy.id === best.id);
		// Default to w/e it was before
		return bestProxy;
	}

	return undefined;
};

const computeUsableURLS = (proxy?: Region): PreferredProxy => {
	if (!proxy) {