hashtime.js

var str = ["d2rqw3","q5mkv6","68heu9","jbc8tc","we72sf","ch1tri","pjtnql","p5mohp","3ipjbo","evse5n","qbv8wn","4p13qm","g53vkl","ri6qek","5v9l8j","hbcg2i","sofath","74i5ng","ihl0hf","tunsbe","8aqn5d","jnthwd","v3wcqc","9h27kb","ku52ea","wa7u89","anap28","m3djt7","0ggen6","btj9h5","n9m4b4","1mow53","d2rqw3","ofulq2","2t0gk1","e93be0","pm667w","42911v","ffbssu","qsenmt","58higs","glkdar","s1n84r","6eq2vq","hrsupp","t7vpjo","7l1kdn","j14f7m","ue7a1l","8ra4sk","k7cwmj","vkfrgi","a0imah","ldlh4h","wqobvg","b6r6pf","mju1je","0wwtdd","cd2o7c","nq5j1b","268dsa","djb8m9","owe3g8","3cgva7","epjq47","q5mkv6","4ipfp5","fvsaj4","rbv5d3","5p1072","h53s11","si6ms0","6v9hlw","ibccfv","tof79v","84i23u","jhktut","uunoos","9aqjir","kntecq","w3w96p","ah240o","lu4vrn","0a7qlm","bnalfl","n3dg9l","1ggb3k","ctj5uj","o9m0oi","2mosih","e2rncg","pfui6f","3t0d0e","f937rd","qm62lc","528ufb","gfbp9b","rsek3a","68heu9","hlk9o8"];
var hash = {};
for (let i = 0; i < str.length; i++) {
    hash[str[i]] = i;
}

function getHash(hash, prop) {
    var x;
    console.time(prop);
    for (var i = 0; i < 1e8; i++) {
        x = hash[prop];
    }
    console.timeEnd(prop);
    return x;
}

getHash(hash, 'd2rqw3');

//9h27kb
//ku52ea
//58higs
//6v9hlw
//fvsaj4

var a = ['fvsaj4', '6v9hlw', 'notfound'];
for (let i = 0; i < a.length; i++) {
    // getHash(hash, str[i]);
    getHash(hash, a[i]);
}