JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    aaaaaaaaaaaaaaaaa
    <select size="1" class="medium" id="myId">    <option value="">&lt;bitte wählen Sie&gt;</option>
    <option selected="selected" value="3"> 3 Monate</option>
    <option value="6"> 6 Monate</option>
    <option value="12">12 Monate</option>
    <option value="24">24 Monate</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
    <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
    <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
    <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
    <option value="34">dummy</option>
     <option value="34">dummy</option>
     <option value="34">dummy</option>
    ...

JavaScript

function SelectElement(valueToSelect) {
    var element = document.getElementById('myId');
    element.value = valueToSelect;
}

function selectElementWithFilter(valueToSelect) {

    $("#myId option").filter(function() {
        return $(this).attr('value') == valueToSelect;
    }).attr('selected', true);


}


$(function() {
    var oldT = new Date().getTime();
    SelectElement(4);
    console.error(new Date().getTime() - oldT);


    oldT = new Date().getTime();
    selectElementWithFilter(4);
    console.error(new Date().getTime() - oldT);


    oldT = new Date().getTime();
    $("#myId").val("4");
    console.error(new Date().getTime() - oldT);


});