Run results for: forEach vs const size forLoop

Run details:
User agent: Mozilla/5.0 (Macintosh, Intel Mac OS X 10_11_4) AppleWebKit/602.1.28+ (KHTML, like Gecko) Version/9.1 Safari/601.5.17
Browser: Safari 9
Operating system: Mac OS X 10.11.4
Device Platform: Desktop
Date tested: 8 months ago
Test name	Executions per second
forEach	13639.4 Ops/sec
for	6145.2 Ops/sec
Script Preparation code:
var gsmCells = [
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23446,
        "signal_strength": -75
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 59141,
        "signal_strength": -76
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 6924,
        "signal_strength": -80
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23449,
        "signal_strength": -81
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23448,
        "signal_strength": -82
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23447,
        "signal_strength": -83
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23445,
        "signal_strength": -84
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23444,
        "signal_strength": -85
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23443,
        "signal_strength": -86
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23442,
        "signal_strength": -87
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23441,
        "signal_strength": -88
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23440,
        "signal_strength": -89
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23439,
        "signal_strength": -90
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23438,
        "signal_strength": -91
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23437,
        "signal_strength": -92
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23436,
        "signal_strength": -93
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23435,
        "signal_strength": -94
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23434,
        "signal_strength": -95
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23433,
        "signal_strength": -96
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23432,
        "signal_strength": -97
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23431,
        "signal_strength": -98
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23430,
        "signal_strength": -99
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23429,
        "signal_strength": -100
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23428,
        "signal_strength": -101
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23427,
        "signal_strength": -102
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23426,
        "signal_strength": -103
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23425,
        "signal_strength": -104
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23424,
        "signal_strength": -105
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23423,
        "signal_strength": -106
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23422,
        "signal_strength": -107
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23421,
        "signal_strength": -108
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23420,
        "signal_strength": -109
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23419,
        "signal_strength": -110
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23418,
        "signal_strength": -111
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23417,
        "signal_strength": -112
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23416,
        "signal_strength": -113
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23415,
        "signal_strength": -114
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23414,
        "signal_strength": -115
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23413,
        "signal_strength": -116
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23412,
        "signal_strength": -117
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23411,
        "signal_strength": -118
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23410,
        "signal_strength": -119
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23409,
        "signal_strength": -120
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23408,
        "signal_strength": -121
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23407,
        "signal_strength": -122
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23406,
        "signal_strength": -123
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23405,
        "signal_strength": -124
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23404,
        "signal_strength": -125
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23403,
        "signal_strength": -126
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23402,
        "signal_strength": -127
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23401,
        "signal_strength": -128
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23400,
        "signal_strength": -129
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23399,
        "signal_strength": -130
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23398,
        "signal_strength": -131
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23397,
        "signal_strength": -132
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23396,
        "signal_strength": -133
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23395,
        "signal_strength": -134
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23394,
        "signal_strength": -135
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23393,
        "signal_strength": -136
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23392,
        "signal_strength": -137
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23391,
        "signal_strength": -138
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23390,
        "signal_strength": -139
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23389,
        "signal_strength": -140
    },
    {
        "countrycode": 250,
        "operatorid": 2,
        "lac": 9703,
        "cellid": 23388,
        "signal_strength": -141
    }
];
Tests:
forEach
let max = gsmCells[0]; gsmCells.forEach( (element, index) => { if(element.signal_strength > max.signal_strength) max = element; } )
for
let max = gsmCells[0]; const a = gsmCells.length; for(let i = 0; i < a; i++){ if(gsmCells[i].signal_strength > max.signal_strength) max = gsmCells[i]; }