Updated the cloudflare.js task

Author: gnmyt

server/tasks/cloudflare.js

@@ -61,6 +61,17 @@ function quartile(values, percentile) {
     return values[base];
 }
 
+function jitter(values) {
+    // Average distance between consecutive latency measurements...
+    let jitters = [];
+
+    for (let i = 0; i < values.length - 1; i += 1) {
+        jitters.push(Math.abs(values[i] - values[i+1]));
+    }
+
+    return average(jitters);
+}
+
 function request(options, data = "") {
     let started;
     let dnsLookup;
@@ -148,7 +159,7 @@ async function measureLatency() {
         );
     }
 
-    return [Math.min(...measurements), Math.max(...measurements), average(measurements), median(measurements)];
+    return [Math.min(...measurements), Math.max(...measurements), average(measurements), median(measurements), jitter(measurements)];
 }
 
 async function measureDownload(bytes, iterations) {
@@ -193,13 +204,13 @@ module.exports = async function speedTest() {
         result["ping"] = Math.round((await measureLatency())[3]);
 
         const testDown1 = await measureDownload(101000, 10);
-        const testDown2 = await measureDownload(25001000, 2);
+        const testDown2 = await measureDownload(25001000, 4);
         const testDown3 = await measureDownload(100001000, 1);
         result["download"] = quartile([...testDown1, ...testDown2, ...testDown3], 0.9).toFixed(2);
 
         const testUp1 = await measureUpload(11000, 10);
-        const testUp2 = await measureUpload(101000, 5);
-        const testUp3 = await measureUpload(1001000, 4);
+        const testUp2 = await measureUpload(101000, 10);
+        const testUp3 = await measureUpload(1001000, 8);
         result["upload"] = quartile([...testUp1, ...testUp2, ...testUp3], 0.9).toFixed(2);
     } catch (error) {
         console.error("Error while using cloudflare speedtest");