671f8e4fac56f9dcd5497c1e45e7cda89d98cceb
chmalee
  Wed Apr 19 14:45:03 2023 -0700
Adding an asynchronous logging function for the javascript

diff --git src/hg/js/hgTracks.js src/hg/js/hgTracks.js
index 8421096..3cdbd11 100644
--- src/hg/js/hgTracks.js
+++ src/hg/js/hgTracks.js
@@ -5481,30 +5481,31 @@
         newLink.textContent = "Download Current Track Data";
         newLink.href = "#";
         newListEl.appendChild(newLink);
         $("#downloads > ul")[0].appendChild(newListEl);
         $("#hgTracksDownload").click(downloadCurrentTrackData.showDownloadUi);
     }
     
 });
 
 function hgtWarnTiming(maxSeconds) {
     /* show a dialog box if the page load time was slower than x seconds. Has buttons to hide or never show this again. */
     var loadTime = window.performance.timing.domContentLoadedEventStart-window.performance.timing.navigationStart; /// in msecs
     var loadSeconds = loadTime/1000;
     var skipNotification = localStorage.getItem("hgTracks.hideSpeedNotification");
     if (loadSeconds > maxSeconds && !skipNotification) {
+        writeToApacheLog("load time: " + loadSeconds + "s, showing warning message");
         var div = document.createElement("div");
         div.style.display = "none";
         div.style.width = "90%";
         div.style.marginLeft = "100px";
         div.id = "notifBox";
         div.innerHTML = "This page took "+loadSeconds+" seconds to load. We strive to keep "+
             "the UCSC Genome Browser quick and responsive. See our "+
             "<b><a href='../FAQ/FAQtracks.html#speed' target='_blank'>display speed FAQ</a></b> for "+
             "common causes and solutions to slow performance. If this problem continues, you can create a  "+
             "session link via <b>My Data</b> &gt; <b>My Sessions</b> and send the link to <b>genome-www@soe.ucsc.edu</b>.<br>"+
             "<div style='text-align:center'>"+
             "<button id='notifyHide'>Close</button>&nbsp;"+
             "<button id='notifyHideForever'>Don't show again</button>"+
             "</div>";
         document.body.appendChild(div);