Log time to deviceready event - requires window.performance.timing

devicereadyPerformance.js

document.addEventListener('deviceready',function() {
    var deltaT = +new Date() - window.performance.timing.navigationStart;
    var perfLog = window.localStorage.perfLog ? JSON.parse(window.localStorage.perfLog) : [];
    perfLog.push(deltaT);
    
    window.localStorage.perfLog = JSON.stringify(perfLog);
    
    var maxSamples = 100;
    if (perfLog.length < maxSamples) {
        window.location.reload();
    }
    else {
        perfLog.sort(function (a, b) {
            return (( a < b ) ? -1 : (( a > b ) ? 1 : 0 ));
        });
        console.log("min = " + perfLog[0]);
        console.log("max = " + perfLog[maxSamples-1]);
        var total = 0;
        for (var n = 0; n < maxSamples; n++) {
            total += perfLog[n];
        }
        console.log("average = " + (total / maxSamples));
        window.localStorage.perfLog = JSON.stringify([]);
    }
});