@kirz/expo-speedtest/build/speedtest.js

Measure internet latency, download and upload speed

import { testDownload, testUpload, testPing } from "./speedtest-module";
import { percentile90 } from "./utils";
const MAX_PACKET_SIZE = 50e6; // 50 MB
const DEFAULT_PACKET_SIZE = 1e6; // 1 MB
export async function startMeasure({ types, duration = 10e3, // 10 seconds,
onMeasureStart, onMeasureFinish, onMeasureProgress, }) {
    for (const type of types) {
        if (type === "ping") {
            onMeasureStart?.(type);
            let currentPing = 0;
            const pings = [];
            for (let i = 0; i < 10; i++) {
                let result = 1000;
                try {
                    result = await ping("8.8.8.8");
                }
                catch { }
                pings.push(result);
                currentPing = percentile90(pings);
                onMeasureProgress?.(type, currentPing, 100);
            }
            onMeasureFinish?.(type, currentPing);
            return;
        }
        let packetSize = DEFAULT_PACKET_SIZE;
        let prevSpeed = 0;
        const adjustPacketSize = (speed) => {
            let newPacketSize = speed > prevSpeed
                ? Math.min(packetSize * 1.5, MAX_PACKET_SIZE)
                : Math.max(packetSize / 1.5, DEFAULT_PACKET_SIZE);
            newPacketSize = Math.round(newPacketSize / 1e6) * 1e6;
            packetSize = newPacketSize;
            prevSpeed = speed;
        };
        onMeasureStart?.(type);
        const speeds = [];
        const currentTimelimit = Date.now() + duration;
        let currentSpeed = 0;
        while (Date.now() < currentTimelimit) {
            const speed = await (type === "download" ? testDownload : testUpload)(packetSize);
            speeds.push(speed);
            currentSpeed = percentile90(speeds);
            adjustPacketSize(currentSpeed);
            onMeasureProgress?.(type, currentSpeed, Math.min(((Date.now() - (currentTimelimit - duration)) / duration) * 100, 100));
        }
        onMeasureProgress?.(type, currentSpeed, 100);
        onMeasureFinish?.(type, currentSpeed);
    }
}
export async function ping(host, timeout = 1000) {
    return testPing(host, timeout);
}
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