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Improve Performance API usage in server_selector.js

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adolfintel
2019-05-07 17:05:26 +02:00
parent db6a3cacf1
commit 9883b003d6
2 changed files with 3 additions and 3 deletions
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Frontend/server_selector.js
+2 -2
View File
@@ -21,8 +21,8 @@ function ping(url, result) {
var instspd = new Date().getTime() - t; //rough timing estimate
try {
//try to get more accurate timing using performance API
var p = performance.getEntries();
p = p[p.length - 1];
var p = performance.getEntriesByName(url);
p=p[p.length-1];
var d = p.responseStart - p.requestStart;
if (d <= 0) d = p.duration;
if (d > 0 && d < instspd) instspd = d;
Frontend/server_selector.min.js
Vendored
+1 -1
View File
@@ -1 +1 @@
var PING_TIMEOUT=1e3,USE_PING_TIMEOUT=!0;function ping(url,result){var xhr=new XMLHttpRequest,t=(new Date).getTime();if(xhr.onload=function(){if(0==xhr.responseText.length){var instspd=(new Date).getTime()-t;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){}result(instspd)}else result(-1)}.bind(this),xhr.onerror=function(){result(-1)}.bind(this),xhr.open("GET",url),USE_PING_TIMEOUT)try{xhr.timeout=PING_TIMEOUT,xhr.ontimeout=xhr.onerror}catch(e){}xhr.send()}/MSIE.(\d+\.\d+)/i.test(navigator.userAgent)&&(USE_PING_TIMEOUT=!1);var PINGS=3,SLOW_THRESHOLD=500;function checkServer(server,done){var i=0;if((server.pingT=-1)==server.server.indexOf(location.protocol))done();else{var nextPing=function(){i++!=PINGS?ping(server.server+server.pingURL,function(t){0<=t?((t<server.pingT||-1==server.pingT)&&(server.pingT=t),t<SLOW_THRESHOLD?nextPing():done()):done()}.bind(this)):done()}.bind(this);nextPing()}}function selectServer(serverList,result){var i=0,done=function(){for(var bestServer=null,i=0;i<serverList.length;i++)-1!=serverList[i].pingT&&(null==bestServer||serverList[i].pingT<bestServer.pingT)&&(bestServer=serverList[i]);result(bestServer)}.bind(this),nextServer=function(){i!=serverList.length?checkServer(serverList[i++],nextServer):done()}.bind(this);nextServer()}var CONCURRENCY=4;function fastSelectServer(serverList,result){for(var serverLists=[],i=0;i<CONCURRENCY;i++)serverLists[i]=[];for(i=0;i<serverList.length;i++)serverLists[i%CONCURRENCY].push(serverList[i]);var completed=0,bestServer=null;for(i=0;i<CONCURRENCY;i++)selectServer(serverLists[i],function(server){null!=server&&(null==bestServer||server.pingT<bestServer.pingT)&&(bestServer=server),++completed==CONCURRENCY&&result(bestServer)}.bind(this))}
var PING_TIMEOUT=1e3,USE_PING_TIMEOUT=!0;function ping(url,result){var xhr=new XMLHttpRequest,t=(new Date).getTime();if(xhr.onload=function(){if(0==xhr.responseText.length){var instspd=(new Date).getTime()-t;try{var p=performance.getEntriesByName(url),d=(p=p[p.length-1]).responseStart-p.requestStart;d<=0&&(d=p.duration),0<d&&d<instspd&&(instspd=d)}catch(e){}result(instspd)}else result(-1)}.bind(this),xhr.onerror=function(){result(-1)}.bind(this),xhr.open("GET",url),USE_PING_TIMEOUT)try{xhr.timeout=PING_TIMEOUT,xhr.ontimeout=xhr.onerror}catch(e){}xhr.send()}/MSIE.(\d+\.\d+)/i.test(navigator.userAgent)&&(USE_PING_TIMEOUT=!1);var PINGS=3,SLOW_THRESHOLD=500;function checkServer(server,done){var i=0;if((server.pingT=-1)==server.server.indexOf(location.protocol))done();else{var nextPing=function(){i++!=PINGS?ping(server.server+server.pingURL,function(t){0<=t?((t<server.pingT||-1==server.pingT)&&(server.pingT=t),t<SLOW_THRESHOLD?nextPing():done()):done()}.bind(this)):done()}.bind(this);nextPing()}}function selectServer(serverList,result){var i=0,done=function(){for(var bestServer=null,i=0;i<serverList.length;i++)-1!=serverList[i].pingT&&(null==bestServer||serverList[i].pingT<bestServer.pingT)&&(bestServer=serverList[i]);result(bestServer)}.bind(this),nextServer=function(){i!=serverList.length?checkServer(serverList[i++],nextServer):done()}.bind(this);nextServer()}var CONCURRENCY=4;function fastSelectServer(serverList,result){for(var serverLists=[],i=0;i<CONCURRENCY;i++)serverLists[i]=[];for(i=0;i<serverList.length;i++)serverLists[i%CONCURRENCY].push(serverList[i]);var completed=0,bestServer=null;for(i=0;i<CONCURRENCY;i++)selectServer(serverLists[i],function(server){null!=server&&(null==bestServer||server.pingT<bestServer.pingT)&&(bestServer=server),++completed==CONCURRENCY&&result(bestServer)}.bind(this))}