diff --git a/doc.md b/doc.md
index 001b7d7..1b4f09f 100644
--- a/doc.md
+++ b/doc.md
@@ -256,6 +256,7 @@ w.postMessage('start '+JSON.stringify(params))
     * Recommended: `>=1`
 * __ping_allowPerformanceApi__: toggles use of Performance API to improve accuracy of Ping/Jitter test on browsers that support it.
 	* Default: `true`
+	* Default override: `false` on Firefox because its performance API implementation is inaccurate
 * __useMebibits__: use mebibits/s instead of megabits/s for the speeds
 	* Default: `false`
 * __overheadCompensationFactor__: compensation for HTTP and network overhead. Default value assumes typical MTUs used over the Internet. You might want to change this if you're using this in your internal network with different MTUs, or if you're using IPv6 instead of IPv4.
diff --git a/speedtest_worker.js b/speedtest_worker.js
index b440e6c..249a7e0 100644
--- a/speedtest_worker.js
+++ b/speedtest_worker.js
@@ -129,6 +129,10 @@ this.addEventListener("message", function(e) {
 						// ff more precise with 1 upload stream
 						settings.xhr_ulMultistream = 1;
 					}
+					if (typeof s.xhr_ulMultistream === "undefined") {
+						// ff performance API sucks
+						settings.ping_allowPerformanceApi = false;
+					}
 				}
 				if (/Edge.(\d+\.\d+)/i.test(ua)) {
 					if (typeof s.xhr_dlMultistream === "undefined") {
@@ -595,15 +599,17 @@ function pingTest(done) {
 						//try to get accurate performance timing using performance api
 						var p = performance.getEntries();
 						p = p[p.length - 1];
-						var d = p.responseStart - p.requestStart; //best precision: chromium-based
-						if (d <= 0) d = p.duration; //edge: not so good precision because it also considers the overhead and there is no way to avoid it
+						var d = p.responseStart - p.requestStart;
+						if (d <= 0) d = p.duration;
 						if (d > 0 && d < instspd) instspd = d;
 					} catch (e) {
 						//if not possible, keep the estimate
-						//firefox can't access performance api from worker: worst precision
 						tverb("Performance API not supported, using estimate");
 					}
 				}
+				//noticed that some browsers randomly have 0ms ping
+				if(instspd<1) instspd=prevInstspd;
+				if(instspd<1) instspd=1;
 				var instjitter = Math.abs(instspd - prevInstspd);
 				if (i === 1) ping = instspd;
 				/* first ping, can't tell jitter yet*/ else {
diff --git a/speedtest_worker.min.js b/speedtest_worker.min.js
index 7f26384..2143af2 100644
--- a/speedtest_worker.min.js
+++ b/speedtest_worker.min.js
@@ -1 +1 @@
-var testStatus=-1,dlStatus="",ulStatus="",pingStatus="",jitterStatus="",clientIp="",dlProgress=0,ulProgress=0,pingProgress=0,testId=null,log="";function tlog(s){2<=settings.telemetry_level&&(log+=Date.now()+": "+s+"\n")}function tverb(s){3<=settings.telemetry_level&&(log+=Date.now()+": "+s+"\n")}function twarn(s){2<=settings.telemetry_level&&(log+=Date.now()+" WARN: "+s+"\n"),console.warn(s)}var settings={test_order:"IP_D_U",time_ul_max:15,time_dl_max:15,time_auto:!0,time_ulGraceTime:3,time_dlGraceTime:1.5,count_ping:10,url_dl:"garbage.php",url_ul:"empty.php",url_ping:"empty.php",url_getIp:"getIP.php",getIp_ispInfo:!0,getIp_ispInfo_distance:"km",xhr_dlMultistream:6,xhr_ulMultistream:3,xhr_multistreamDelay:300,xhr_ignoreErrors:1,xhr_dlUseBlob:!1,xhr_ul_blob_megabytes:20,garbagePhp_chunkSize:100,enable_quirks:!0,ping_allowPerformanceApi:!0,overheadCompensationFactor:1.06,useMebibits:!1,telemetry_level:0,url_telemetry:"telemetry/telemetry.php",telemetry_extra:""},xhr=null,interval=null,test_pointer=0;function url_sep(url){return url.match(/\?/)?"&":"?"}function clearRequests(){if(tverb("stopping pending XHRs"),xhr){for(var i=0;i<xhr.length;i++){try{xhr[i].onprogress=null,xhr[i].onload=null,xhr[i].onerror=null}catch(e){}try{xhr[i].upload.onprogress=null,xhr[i].upload.onload=null,xhr[i].upload.onerror=null}catch(e){}try{xhr[i].abort()}catch(e){}try{delete xhr[i]}catch(e){}}xhr=null}}this.addEventListener("message",function(e){var params=e.data.split(" ");if("status"===params[0]&&postMessage(JSON.stringify({testState:testStatus,dlStatus:dlStatus,ulStatus:ulStatus,pingStatus:pingStatus,clientIp:clientIp,jitterStatus:jitterStatus,dlProgress:dlProgress,ulProgress:ulProgress,pingProgress:pingProgress,testId:testId})),"start"===params[0]&&-1===testStatus){testStatus=0;try{var s={};try{var ss=e.data.substring(5);ss&&(s=JSON.parse(ss))}catch(e){twarn("Error parsing custom settings JSON. Please check your syntax")}for(var key in s)void 0!==settings[key]?settings[key]=s[key]:twarn("Unknown setting ignored: "+key);if(settings.enable_quirks||void 0!==s.enable_quirks&&s.enable_quirks){var ua=navigator.userAgent;/Firefox.(\d+\.\d+)/i.test(ua)&&void 0===s.xhr_ulMultistream&&(settings.xhr_ulMultistream=1),/Edge.(\d+\.\d+)/i.test(ua)&&void 0===s.xhr_dlMultistream&&(settings.xhr_dlMultistream=3),/Chrome.(\d+)/i.test(ua)&&self.fetch&&void 0===s.xhr_dlMultistream&&(settings.xhr_dlMultistream=5)}/Edge.(\d+\.\d+)/i.test(ua)&&(settings.forceIE11Workaround=!0),/PlayStation 4.(\d+\.\d+)/i.test(ua)&&(settings.forceIE11Workaround=!0),/Chrome.(\d+)/i.test(ua)&&/Android|iPhone|iPad|iPod|Windows Phone/i.test(ua)&&(settings.xhr_ul_blob_megabytes=4),void 0!==s.telemetry_level&&(settings.telemetry_level="basic"===s.telemetry_level?1:"full"===s.telemetry_level?2:"debug"===s.telemetry_level?3:0),settings.test_order=settings.test_order.toUpperCase()}catch(e){twarn("Possible error in custom test settings. Some settings may not be applied. Exception: "+e)}tverb(JSON.stringify(settings)),test_pointer=0;var iRun=!1,dRun=!1,uRun=!1,pRun=!1,runNextTest=function(){if(5!=testStatus)if(test_pointer>=settings.test_order.length)0<settings.telemetry_level?sendTelemetry(function(id){testStatus=4,null!=id&&(testId=id)}):testStatus=4;else switch(settings.test_order.charAt(test_pointer)){case"I":if(test_pointer++,iRun)return void runNextTest();iRun=!0,getIp(runNextTest);break;case"D":if(test_pointer++,dRun)return void runNextTest();dRun=!0,testStatus=1,dlTest(runNextTest);break;case"U":if(test_pointer++,uRun)return void runNextTest();uRun=!0,testStatus=3,ulTest(runNextTest);break;case"P":if(test_pointer++,pRun)return void runNextTest();pRun=!0,testStatus=2,pingTest(runNextTest);break;case"_":test_pointer++,setTimeout(runNextTest,1e3);break;default:test_pointer++}};runNextTest()}"abort"===params[0]&&(tlog("manually aborted"),clearRequests(),runNextTest=null,interval&&clearInterval(interval),1<settings.telemetry_level&&sendTelemetry(function(){}),testStatus=5,jitterStatus=pingStatus=ulStatus=dlStatus="")});var ipCalled=!1,ispInfo="";function getIp(done){if(tverb("getIp"),!ipCalled){ipCalled=!0;var startT=(new Date).getTime();(xhr=new XMLHttpRequest).onload=function(){tlog("IP: "+xhr.responseText+", took "+((new Date).getTime()-startT)+"ms");try{var data=JSON.parse(xhr.responseText);clientIp=data.processedString,ispInfo=data.rawIspInfo}catch(e){clientIp=xhr.responseText,ispInfo=""}done()},xhr.onerror=function(){tlog("getIp failed, took "+((new Date).getTime()-startT)+"ms"),done()},xhr.open("GET",settings.url_getIp+url_sep(settings.url_getIp)+(settings.getIp_ispInfo?"isp=true"+(settings.getIp_ispInfo_distance?"&distance="+settings.getIp_ispInfo_distance+"&":"&"):"&")+"r="+Math.random(),!0),xhr.send()}}var dlCalled=!1;function dlTest(done){if(tverb("dlTest"),!dlCalled){dlCalled=!0;var totLoaded=0,startT=(new Date).getTime(),bonusT=0,graceTimeDone=!1,failed=!1;xhr=[];for(var testStream=function(i,delay){setTimeout(function(){if(1===testStatus){tverb("dl test stream started "+i+" "+delay);var prevLoaded=0,x=new XMLHttpRequest;xhr[i]=x,xhr[i].onprogress=function(event){if(tverb("dl stream progress event "+i+" "+event.loaded),1!==testStatus)try{x.abort()}catch(e){}var loadDiff=event.loaded<=0?0:event.loaded-prevLoaded;isNaN(loadDiff)||!isFinite(loadDiff)||loadDiff<0||(totLoaded+=loadDiff,prevLoaded=event.loaded)}.bind(this),xhr[i].onload=function(){tverb("dl stream finished "+i);try{xhr[i].abort()}catch(e){}testStream(i,0)}.bind(this),xhr[i].onerror=function(){tverb("dl stream failed "+i),0===settings.xhr_ignoreErrors&&(failed=!0);try{xhr[i].abort()}catch(e){}delete xhr[i],1===settings.xhr_ignoreErrors&&testStream(i,0)}.bind(this);try{settings.xhr_dlUseBlob?xhr[i].responseType="blob":xhr[i].responseType="arraybuffer"}catch(e){}xhr[i].open("GET",settings.url_dl+url_sep(settings.url_dl)+"r="+Math.random()+"&ckSize="+settings.garbagePhp_chunkSize,!0),xhr[i].send()}}.bind(this),1+delay)}.bind(this),i=0;i<settings.xhr_dlMultistream;i++)testStream(i,settings.xhr_multistreamDelay*i);interval=setInterval(function(){tverb("DL: "+dlStatus+(graceTimeDone?"":" (in grace time)"));var t=(new Date).getTime()-startT;if(graceTimeDone&&(dlProgress=(t+bonusT)/(1e3*settings.time_dl_max)),!(t<200))if(graceTimeDone){var speed=totLoaded/(t/1e3);if(settings.time_auto){var bonus=6.4*speed/1e5;bonusT+=800<bonus?800:bonus}dlStatus=(8*speed*settings.overheadCompensationFactor/(settings.useMebibits?1048576:1e6)).toFixed(2),((t+bonusT)/1e3>settings.time_dl_max||failed)&&((failed||isNaN(dlStatus))&&(dlStatus="Fail"),clearRequests(),clearInterval(interval),dlProgress=1,tlog("dlTest: "+dlStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}else t>1e3*settings.time_dlGraceTime&&(0<totLoaded&&(startT=(new Date).getTime(),totLoaded=bonusT=0),graceTimeDone=!0)}.bind(this),200)}}var ulCalled=!1;function ulTest(done){if(tverb("ulTest"),!ulCalled){ulCalled=!0;var r=new ArrayBuffer(1048576),maxInt=Math.pow(2,32)-1;try{r=new Uint32Array(r);for(var i=0;i<r.length;i++)r[i]=Math.random()*maxInt}catch(e){}var req=[],reqsmall=[];for(i=0;i<settings.xhr_ul_blob_megabytes;i++)req.push(r);req=new Blob(req),r=new ArrayBuffer(262144);try{r=new Uint32Array(r);for(i=0;i<r.length;i++)r[i]=Math.random()*maxInt}catch(e){}reqsmall.push(r),reqsmall=new Blob(reqsmall);var totLoaded=0,startT=(new Date).getTime(),bonusT=0,graceTimeDone=!1,failed=!1;xhr=[];var testStream=function(i,delay){setTimeout(function(){if(3===testStatus){tverb("ul test stream started "+i+" "+delay);var ie11workaround,prevLoaded=0,x=new XMLHttpRequest;if(xhr[i]=x,settings.forceIE11Workaround)ie11workaround=!0;else try{xhr[i].upload.onprogress,ie11workaround=!1}catch(e){ie11workaround=!0}if(ie11workaround){xhr[i].onload=xhr[i].onerror=function(){tverb("ul stream progress event (ie11wa)"),totLoaded+=reqsmall.size,testStream(i,0)},xhr[i].open("POST",settings.url_ul+url_sep(settings.url_ul)+"r="+Math.random(),!0);try{xhr[i].setRequestHeader("Content-Encoding","identity")}catch(e){}try{xhr[i].setRequestHeader("Content-Type","application/octet-stream")}catch(e){}xhr[i].send(reqsmall)}else{xhr[i].upload.onprogress=function(event){if(tverb("ul stream progress event "+i+" "+event.loaded),3!==testStatus)try{x.abort()}catch(e){}var loadDiff=event.loaded<=0?0:event.loaded-prevLoaded;isNaN(loadDiff)||!isFinite(loadDiff)||loadDiff<0||(totLoaded+=loadDiff,prevLoaded=event.loaded)}.bind(this),xhr[i].upload.onload=function(){tverb("ul stream finished "+i),testStream(i,0)}.bind(this),xhr[i].upload.onerror=function(){tverb("ul stream failed "+i),0===settings.xhr_ignoreErrors&&(failed=!0);try{xhr[i].abort()}catch(e){}delete xhr[i],1===settings.xhr_ignoreErrors&&testStream(i,0)}.bind(this),xhr[i].open("POST",settings.url_ul+url_sep(settings.url_ul)+"r="+Math.random(),!0);try{xhr[i].setRequestHeader("Content-Encoding","identity")}catch(e){}try{xhr[i].setRequestHeader("Content-Type","application/octet-stream")}catch(e){}xhr[i].send(req)}}}.bind(this),1)}.bind(this);for(i=0;i<settings.xhr_ulMultistream;i++)testStream(i,settings.xhr_multistreamDelay*i);interval=setInterval(function(){tverb("UL: "+ulStatus+(graceTimeDone?"":" (in grace time)"));var t=(new Date).getTime()-startT;if(graceTimeDone&&(ulProgress=(t+bonusT)/(1e3*settings.time_ul_max)),!(t<200))if(graceTimeDone){var speed=totLoaded/(t/1e3);if(settings.time_auto){var bonus=6.4*speed/1e5;bonusT+=800<bonus?800:bonus}ulStatus=(8*speed*settings.overheadCompensationFactor/(settings.useMebibits?1048576:1e6)).toFixed(2),((t+bonusT)/1e3>settings.time_ul_max||failed)&&((failed||isNaN(ulStatus))&&(ulStatus="Fail"),clearRequests(),clearInterval(interval),ulProgress=1,tlog("ulTest: "+ulStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}else t>1e3*settings.time_ulGraceTime&&(0<totLoaded&&(startT=(new Date).getTime(),totLoaded=bonusT=0),graceTimeDone=!0)}.bind(this),200)}}var ptCalled=!1;function pingTest(done){if(tverb("pingTest"),!ptCalled){ptCalled=!0;var startT=(new Date).getTime(),prevT=null,ping=0,jitter=0,i=0,prevInstspd=0;xhr=[];var doPing=function(){tverb("ping"),pingProgress=i/settings.count_ping,prevT=(new Date).getTime(),xhr[0]=new XMLHttpRequest,xhr[0].onload=function(){if(tverb("pong"),0===i)prevT=(new Date).getTime();else{var instspd=(new Date).getTime()-prevT;if(settings.ping_allowPerformanceApi)try{var p=performance.getEntries(),d=(p=p[p.length-1]).responseStart-p.requestStart;d<=0&&(d=p.duration),0<d&&d<instspd&&(instspd=d)}catch(e){tverb("Performance API not supported, using estimate")}var instjitter=Math.abs(instspd-prevInstspd);1===i?ping=instspd:(ping=instspd<ping?instspd:.8*ping+.2*instspd,jitter=2===i?instjitter:jitter<instjitter?.3*jitter+.7*instjitter:.8*jitter+.2*instjitter),prevInstspd=instspd}pingStatus=ping.toFixed(2),jitterStatus=jitter.toFixed(2),i++,tverb("ping: "+pingStatus+" jitter: "+jitterStatus),i<settings.count_ping?doPing():(pingProgress=1,tlog("ping: "+pingStatus+" jitter: "+jitterStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}.bind(this),xhr[0].onerror=function(){tverb("ping failed"),0===settings.xhr_ignoreErrors&&(jitterStatus=pingStatus="Fail",clearRequests(),tlog("ping test failed, took "+((new Date).getTime()-startT)+"ms"),pingProgress=1,done()),1===settings.xhr_ignoreErrors&&doPing(),2===settings.xhr_ignoreErrors&&(++i<settings.count_ping?doPing():(pingProgress=1,tlog("ping: "+pingStatus+" jitter: "+jitterStatus+", took "+((new Date).getTime()-startT)+"ms"),done()))}.bind(this),xhr[0].open("GET",settings.url_ping+url_sep(settings.url_ping)+"r="+Math.random(),!0),xhr[0].send()}.bind(this);doPing()}}function sendTelemetry(done){if(!(settings.telemetry_level<1)){(xhr=new XMLHttpRequest).onload=function(){try{var parts=xhr.responseText.split(" ");if("id"==parts[0])try{var id=parts[1];done(id)}catch(e){done(null)}else done(null)}catch(e){done(null)}},xhr.onerror=function(){console.log("TELEMETRY ERROR "+xhr.status),done(null)},xhr.open("POST",settings.url_telemetry+url_sep(settings.url_telemetry)+"r="+Math.random(),!0);var telemetryIspInfo={processedString:clientIp,rawIspInfo:"object"==typeof ispInfo?ispInfo:""};try{var fd=new FormData;fd.append("ispinfo",JSON.stringify(telemetryIspInfo)),fd.append("dl",dlStatus),fd.append("ul",ulStatus),fd.append("ping",pingStatus),fd.append("jitter",jitterStatus),fd.append("log",1<settings.telemetry_level?log:""),fd.append("extra",settings.telemetry_extra),xhr.send(fd)}catch(ex){var postData="extra="+encodeURIComponent(settings.telemetry_extra)+"&ispinfo="+encodeURIComponent(JSON.stringify(telemetryIspInfo))+"&dl="+encodeURIComponent(dlStatus)+"&ul="+encodeURIComponent(ulStatus)+"&ping="+encodeURIComponent(pingStatus)+"&jitter="+encodeURIComponent(jitterStatus)+"&log="+encodeURIComponent(1<settings.telemetry_level?log:"");xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded"),xhr.send(postData)}}}
\ No newline at end of file
+var testStatus=-1,dlStatus="",ulStatus="",pingStatus="",jitterStatus="",clientIp="",dlProgress=0,ulProgress=0,pingProgress=0,testId=null,log="";function tlog(s){2<=settings.telemetry_level&&(log+=Date.now()+": "+s+"\n")}function tverb(s){3<=settings.telemetry_level&&(log+=Date.now()+": "+s+"\n")}function twarn(s){2<=settings.telemetry_level&&(log+=Date.now()+" WARN: "+s+"\n"),console.warn(s)}var settings={test_order:"IP_D_U",time_ul_max:15,time_dl_max:15,time_auto:!0,time_ulGraceTime:3,time_dlGraceTime:1.5,count_ping:10,url_dl:"garbage.php",url_ul:"empty.php",url_ping:"empty.php",url_getIp:"getIP.php",getIp_ispInfo:!0,getIp_ispInfo_distance:"km",xhr_dlMultistream:6,xhr_ulMultistream:3,xhr_multistreamDelay:300,xhr_ignoreErrors:1,xhr_dlUseBlob:!1,xhr_ul_blob_megabytes:20,garbagePhp_chunkSize:100,enable_quirks:!0,ping_allowPerformanceApi:!0,overheadCompensationFactor:1.06,useMebibits:!1,telemetry_level:0,url_telemetry:"telemetry/telemetry.php",telemetry_extra:""},xhr=null,interval=null,test_pointer=0;function url_sep(url){return url.match(/\?/)?"&":"?"}function clearRequests(){if(tverb("stopping pending XHRs"),xhr){for(var i=0;i<xhr.length;i++){try{xhr[i].onprogress=null,xhr[i].onload=null,xhr[i].onerror=null}catch(e){}try{xhr[i].upload.onprogress=null,xhr[i].upload.onload=null,xhr[i].upload.onerror=null}catch(e){}try{xhr[i].abort()}catch(e){}try{delete xhr[i]}catch(e){}}xhr=null}}this.addEventListener("message",function(e){var params=e.data.split(" ");if("status"===params[0]&&postMessage(JSON.stringify({testState:testStatus,dlStatus:dlStatus,ulStatus:ulStatus,pingStatus:pingStatus,clientIp:clientIp,jitterStatus:jitterStatus,dlProgress:dlProgress,ulProgress:ulProgress,pingProgress:pingProgress,testId:testId})),"start"===params[0]&&-1===testStatus){testStatus=0;try{var s={};try{var ss=e.data.substring(5);ss&&(s=JSON.parse(ss))}catch(e){twarn("Error parsing custom settings JSON. Please check your syntax")}for(var key in s)void 0!==settings[key]?settings[key]=s[key]:twarn("Unknown setting ignored: "+key);if(settings.enable_quirks||void 0!==s.enable_quirks&&s.enable_quirks){var ua=navigator.userAgent;/Firefox.(\d+\.\d+)/i.test(ua)&&(void 0===s.xhr_ulMultistream&&(settings.xhr_ulMultistream=1),void 0===s.xhr_ulMultistream&&(settings.ping_allowPerformanceApi=!1)),/Edge.(\d+\.\d+)/i.test(ua)&&void 0===s.xhr_dlMultistream&&(settings.xhr_dlMultistream=3),/Chrome.(\d+)/i.test(ua)&&self.fetch&&void 0===s.xhr_dlMultistream&&(settings.xhr_dlMultistream=5)}/Edge.(\d+\.\d+)/i.test(ua)&&(settings.forceIE11Workaround=!0),/PlayStation 4.(\d+\.\d+)/i.test(ua)&&(settings.forceIE11Workaround=!0),/Chrome.(\d+)/i.test(ua)&&/Android|iPhone|iPad|iPod|Windows Phone/i.test(ua)&&(settings.xhr_ul_blob_megabytes=4),void 0!==s.telemetry_level&&(settings.telemetry_level="basic"===s.telemetry_level?1:"full"===s.telemetry_level?2:"debug"===s.telemetry_level?3:0),settings.test_order=settings.test_order.toUpperCase()}catch(e){twarn("Possible error in custom test settings. Some settings may not be applied. Exception: "+e)}tverb(JSON.stringify(settings)),test_pointer=0;var iRun=!1,dRun=!1,uRun=!1,pRun=!1,runNextTest=function(){if(5!=testStatus)if(test_pointer>=settings.test_order.length)0<settings.telemetry_level?sendTelemetry(function(id){testStatus=4,null!=id&&(testId=id)}):testStatus=4;else switch(settings.test_order.charAt(test_pointer)){case"I":if(test_pointer++,iRun)return void runNextTest();iRun=!0,getIp(runNextTest);break;case"D":if(test_pointer++,dRun)return void runNextTest();dRun=!0,testStatus=1,dlTest(runNextTest);break;case"U":if(test_pointer++,uRun)return void runNextTest();uRun=!0,testStatus=3,ulTest(runNextTest);break;case"P":if(test_pointer++,pRun)return void runNextTest();pRun=!0,testStatus=2,pingTest(runNextTest);break;case"_":test_pointer++,setTimeout(runNextTest,1e3);break;default:test_pointer++}};runNextTest()}"abort"===params[0]&&(tlog("manually aborted"),clearRequests(),runNextTest=null,interval&&clearInterval(interval),1<settings.telemetry_level&&sendTelemetry(function(){}),testStatus=5,jitterStatus=pingStatus=ulStatus=dlStatus="")});var ipCalled=!1,ispInfo="";function getIp(done){if(tverb("getIp"),!ipCalled){ipCalled=!0;var startT=(new Date).getTime();(xhr=new XMLHttpRequest).onload=function(){tlog("IP: "+xhr.responseText+", took "+((new Date).getTime()-startT)+"ms");try{var data=JSON.parse(xhr.responseText);clientIp=data.processedString,ispInfo=data.rawIspInfo}catch(e){clientIp=xhr.responseText,ispInfo=""}done()},xhr.onerror=function(){tlog("getIp failed, took "+((new Date).getTime()-startT)+"ms"),done()},xhr.open("GET",settings.url_getIp+url_sep(settings.url_getIp)+(settings.getIp_ispInfo?"isp=true"+(settings.getIp_ispInfo_distance?"&distance="+settings.getIp_ispInfo_distance+"&":"&"):"&")+"r="+Math.random(),!0),xhr.send()}}var dlCalled=!1;function dlTest(done){if(tverb("dlTest"),!dlCalled){dlCalled=!0;var totLoaded=0,startT=(new Date).getTime(),bonusT=0,graceTimeDone=!1,failed=!1;xhr=[];for(var testStream=function(i,delay){setTimeout(function(){if(1===testStatus){tverb("dl test stream started "+i+" "+delay);var prevLoaded=0,x=new XMLHttpRequest;xhr[i]=x,xhr[i].onprogress=function(event){if(tverb("dl stream progress event "+i+" "+event.loaded),1!==testStatus)try{x.abort()}catch(e){}var loadDiff=event.loaded<=0?0:event.loaded-prevLoaded;isNaN(loadDiff)||!isFinite(loadDiff)||loadDiff<0||(totLoaded+=loadDiff,prevLoaded=event.loaded)}.bind(this),xhr[i].onload=function(){tverb("dl stream finished "+i);try{xhr[i].abort()}catch(e){}testStream(i,0)}.bind(this),xhr[i].onerror=function(){tverb("dl stream failed "+i),0===settings.xhr_ignoreErrors&&(failed=!0);try{xhr[i].abort()}catch(e){}delete xhr[i],1===settings.xhr_ignoreErrors&&testStream(i,0)}.bind(this);try{settings.xhr_dlUseBlob?xhr[i].responseType="blob":xhr[i].responseType="arraybuffer"}catch(e){}xhr[i].open("GET",settings.url_dl+url_sep(settings.url_dl)+"r="+Math.random()+"&ckSize="+settings.garbagePhp_chunkSize,!0),xhr[i].send()}}.bind(this),1+delay)}.bind(this),i=0;i<settings.xhr_dlMultistream;i++)testStream(i,settings.xhr_multistreamDelay*i);interval=setInterval(function(){tverb("DL: "+dlStatus+(graceTimeDone?"":" (in grace time)"));var t=(new Date).getTime()-startT;if(graceTimeDone&&(dlProgress=(t+bonusT)/(1e3*settings.time_dl_max)),!(t<200))if(graceTimeDone){var speed=totLoaded/(t/1e3);if(settings.time_auto){var bonus=6.4*speed/1e5;bonusT+=800<bonus?800:bonus}dlStatus=(8*speed*settings.overheadCompensationFactor/(settings.useMebibits?1048576:1e6)).toFixed(2),((t+bonusT)/1e3>settings.time_dl_max||failed)&&((failed||isNaN(dlStatus))&&(dlStatus="Fail"),clearRequests(),clearInterval(interval),dlProgress=1,tlog("dlTest: "+dlStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}else t>1e3*settings.time_dlGraceTime&&(0<totLoaded&&(startT=(new Date).getTime(),totLoaded=bonusT=0),graceTimeDone=!0)}.bind(this),200)}}var ulCalled=!1;function ulTest(done){if(tverb("ulTest"),!ulCalled){ulCalled=!0;var r=new ArrayBuffer(1048576),maxInt=Math.pow(2,32)-1;try{r=new Uint32Array(r);for(var i=0;i<r.length;i++)r[i]=Math.random()*maxInt}catch(e){}var req=[],reqsmall=[];for(i=0;i<settings.xhr_ul_blob_megabytes;i++)req.push(r);req=new Blob(req),r=new ArrayBuffer(262144);try{r=new Uint32Array(r);for(i=0;i<r.length;i++)r[i]=Math.random()*maxInt}catch(e){}reqsmall.push(r),reqsmall=new Blob(reqsmall);var totLoaded=0,startT=(new Date).getTime(),bonusT=0,graceTimeDone=!1,failed=!1;xhr=[];var testStream=function(i,delay){setTimeout(function(){if(3===testStatus){tverb("ul test stream started "+i+" "+delay);var ie11workaround,prevLoaded=0,x=new XMLHttpRequest;if(xhr[i]=x,settings.forceIE11Workaround)ie11workaround=!0;else try{xhr[i].upload.onprogress,ie11workaround=!1}catch(e){ie11workaround=!0}if(ie11workaround){xhr[i].onload=xhr[i].onerror=function(){tverb("ul stream progress event (ie11wa)"),totLoaded+=reqsmall.size,testStream(i,0)},xhr[i].open("POST",settings.url_ul+url_sep(settings.url_ul)+"r="+Math.random(),!0);try{xhr[i].setRequestHeader("Content-Encoding","identity")}catch(e){}try{xhr[i].setRequestHeader("Content-Type","application/octet-stream")}catch(e){}xhr[i].send(reqsmall)}else{xhr[i].upload.onprogress=function(event){if(tverb("ul stream progress event "+i+" "+event.loaded),3!==testStatus)try{x.abort()}catch(e){}var loadDiff=event.loaded<=0?0:event.loaded-prevLoaded;isNaN(loadDiff)||!isFinite(loadDiff)||loadDiff<0||(totLoaded+=loadDiff,prevLoaded=event.loaded)}.bind(this),xhr[i].upload.onload=function(){tverb("ul stream finished "+i),testStream(i,0)}.bind(this),xhr[i].upload.onerror=function(){tverb("ul stream failed "+i),0===settings.xhr_ignoreErrors&&(failed=!0);try{xhr[i].abort()}catch(e){}delete xhr[i],1===settings.xhr_ignoreErrors&&testStream(i,0)}.bind(this),xhr[i].open("POST",settings.url_ul+url_sep(settings.url_ul)+"r="+Math.random(),!0);try{xhr[i].setRequestHeader("Content-Encoding","identity")}catch(e){}try{xhr[i].setRequestHeader("Content-Type","application/octet-stream")}catch(e){}xhr[i].send(req)}}}.bind(this),1)}.bind(this);for(i=0;i<settings.xhr_ulMultistream;i++)testStream(i,settings.xhr_multistreamDelay*i);interval=setInterval(function(){tverb("UL: "+ulStatus+(graceTimeDone?"":" (in grace time)"));var t=(new Date).getTime()-startT;if(graceTimeDone&&(ulProgress=(t+bonusT)/(1e3*settings.time_ul_max)),!(t<200))if(graceTimeDone){var speed=totLoaded/(t/1e3);if(settings.time_auto){var bonus=6.4*speed/1e5;bonusT+=800<bonus?800:bonus}ulStatus=(8*speed*settings.overheadCompensationFactor/(settings.useMebibits?1048576:1e6)).toFixed(2),((t+bonusT)/1e3>settings.time_ul_max||failed)&&((failed||isNaN(ulStatus))&&(ulStatus="Fail"),clearRequests(),clearInterval(interval),ulProgress=1,tlog("ulTest: "+ulStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}else t>1e3*settings.time_ulGraceTime&&(0<totLoaded&&(startT=(new Date).getTime(),totLoaded=bonusT=0),graceTimeDone=!0)}.bind(this),200)}}var ptCalled=!1;function pingTest(done){if(tverb("pingTest"),!ptCalled){ptCalled=!0;var startT=(new Date).getTime(),prevT=null,ping=0,jitter=0,i=0,prevInstspd=0;xhr=[];var doPing=function(){tverb("ping"),pingProgress=i/settings.count_ping,prevT=(new Date).getTime(),xhr[0]=new XMLHttpRequest,xhr[0].onload=function(){if(tverb("pong"),0===i)prevT=(new Date).getTime();else{var instspd=(new Date).getTime()-prevT;if(settings.ping_allowPerformanceApi)try{var p=performance.getEntries(),d=(p=p[p.length-1]).responseStart-p.requestStart;d<=0&&(d=p.duration),0<d&&d<instspd&&(instspd=d)}catch(e){tverb("Performance API not supported, using estimate")}instspd<1&&(instspd=prevInstspd),instspd<1&&(instspd=1);var instjitter=Math.abs(instspd-prevInstspd);1===i?ping=instspd:(ping=instspd<ping?instspd:.8*ping+.2*instspd,jitter=2===i?instjitter:jitter<instjitter?.3*jitter+.7*instjitter:.8*jitter+.2*instjitter),prevInstspd=instspd}pingStatus=ping.toFixed(2),jitterStatus=jitter.toFixed(2),i++,tverb("ping: "+pingStatus+" jitter: "+jitterStatus),i<settings.count_ping?doPing():(pingProgress=1,tlog("ping: "+pingStatus+" jitter: "+jitterStatus+", took "+((new Date).getTime()-startT)+"ms"),done())}.bind(this),xhr[0].onerror=function(){tverb("ping failed"),0===settings.xhr_ignoreErrors&&(jitterStatus=pingStatus="Fail",clearRequests(),tlog("ping test failed, took "+((new Date).getTime()-startT)+"ms"),pingProgress=1,done()),1===settings.xhr_ignoreErrors&&doPing(),2===settings.xhr_ignoreErrors&&(++i<settings.count_ping?doPing():(pingProgress=1,tlog("ping: "+pingStatus+" jitter: "+jitterStatus+", took "+((new Date).getTime()-startT)+"ms"),done()))}.bind(this),xhr[0].open("GET",settings.url_ping+url_sep(settings.url_ping)+"r="+Math.random(),!0),xhr[0].send()}.bind(this);doPing()}}function sendTelemetry(done){if(!(settings.telemetry_level<1)){(xhr=new XMLHttpRequest).onload=function(){try{var parts=xhr.responseText.split(" ");if("id"==parts[0])try{var id=parts[1];done(id)}catch(e){done(null)}else done(null)}catch(e){done(null)}},xhr.onerror=function(){console.log("TELEMETRY ERROR "+xhr.status),done(null)},xhr.open("POST",settings.url_telemetry+url_sep(settings.url_telemetry)+"r="+Math.random(),!0);var telemetryIspInfo={processedString:clientIp,rawIspInfo:"object"==typeof ispInfo?ispInfo:""};try{var fd=new FormData;fd.append("ispinfo",JSON.stringify(telemetryIspInfo)),fd.append("dl",dlStatus),fd.append("ul",ulStatus),fd.append("ping",pingStatus),fd.append("jitter",jitterStatus),fd.append("log",1<settings.telemetry_level?log:""),fd.append("extra",settings.telemetry_extra),xhr.send(fd)}catch(ex){var postData="extra="+encodeURIComponent(settings.telemetry_extra)+"&ispinfo="+encodeURIComponent(JSON.stringify(telemetryIspInfo))+"&dl="+encodeURIComponent(dlStatus)+"&ul="+encodeURIComponent(ulStatus)+"&ping="+encodeURIComponent(pingStatus)+"&jitter="+encodeURIComponent(jitterStatus)+"&log="+encodeURIComponent(1<settings.telemetry_level?log:"");xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded"),xhr.send(postData)}}}
\ No newline at end of file