Какая часть кода js вызывает торможение загрузки страницы?

$(function() {

    // Табы в карточке товара
	var tab = $('.tab__nav-tabs');
	var content = $('.tab__content');
	
	tab.first().addClass('active');
	content.not(':first').hide();
	
	tab.on('click', function(){
	  tab.removeClass('active').eq($(this).index()).addClass('active');
	  content.hide().eq($(this).index()).show();
	});

    // Слайдер на странице технологии
    $('.tech_slider-row').slick({
		slidesToShow: 1,
		slidesToScroll: 1,
		arrows: false,
		fade: true,
		swipe: false,
		touchMove: false,
		asNavFor: '.tech_band'
    });
    $('.tech_band').slick({
		slidesToShow: 7,
		slidesToScroll: 1,
		asNavFor: '.tech_slider-row',
		dots: false,
		centerMode: true,
		centerPadding: 0,
		focusOnSelect: true,
		responsive: [
			{
				breakpoint: 1800,
				settings: {
					slidesToShow: 7,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 1440,
				settings: {
					slidesToShow: 6,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 1280,
				settings: {
					slidesToShow: 4,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 1025,
				settings: {
					centerMode: false,
					slidesToShow: 4,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 770,
				settings: {
					centerMode: false,
                    slidesToShow: 3,
                    arrows: false,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 600,
				settings: {
					centerMode: true,
					slidesToShow: 1,
                    slidesToScroll: 1,
                    arrows: false
				}
			}
		]
	});

    // Калькулятор
    $(".product_info-option").each(function(){
        var $box = $(this),
            $selects = $("select", $box),
            $materialSel = $selects.filter("#product_select-material"),
            $circulationlSel = $selects.filter("#product_select-circulation").hide(),
            discountDat = [],
            $countInp = $("#product_count", $box);
          $("option", $circulationlSel).each(function(){
            var $opt = $(this),
              circulation = $opt.data("circulation"),
            discount = $opt.data("discount");
          if(circulation && discount){
              discountDat.push({
                circulation:circulation,
              discount: discount
            });
          }
        });
        
        function getDiscount(count){
            var res = 0;
          $(discountDat).each(function(){
              var data = this;
            if(count >= data.circulation){
                res = data.discount;
            }
          });
            return res;
        }
        
        function calc(){
            var $materialOpt = $("option:selected", $materialSel),
                    material = $materialOpt.data("material") || 0,
                        materialName = $materialOpt.val(),
                circulation = $("option:selected", $circulationlSel).data("circulation") || 1,      
                count = $countInp.val(),
                discount = getDiscount(count),
                price = material * (100 - discount) / 100,
                totalPrice = price * count,
                res =  "<span>Цена за шт: <strong>"+ price +"</strong> руб</span><span>Всего за тираж: <strong>"+ parseInt(totalPrice) +"</strong> руб</span><span>Скидка: <strong>"+discount+"</strong> %</span>",
                $final = $('#final_price', $box).addClass('active').html(res),
                $modal = $(".modal_product-content--total"),
                $modalMaterial = $(".select_item-name", $modal).text(materialName),
                $modalCount = $(".select_item-total", $modal).html("<span>Ваш тираж: <strong>" + count + "</strong></span>");  
          }
            
        $selects.on("change", calc);
        $countInp.on("keyup mouseup", calc);
      });

    // Мобильное меню

    $('.burger').bind('click', function() {
        $('.mobile_menu').toggleClass('open');
    });

    $('#burger-menu').on('click', function () {
		$(this).toggleClass('active');
		$('.mobile_menu').toggleClass('active');
		$('.overlay').toggleClass('active');
	});
	
	$( '.my-menu' ).sliderMenu({
		back: '<span class="slider-menu__text">НАЗАД</span>'
	});

	$('.my-menu .slider-menu-children a').animate({scrollTop: 0});
    
    /* Generate Classes */
    $('.mobile_menu-list li').has('ul').addClass('has-children');


    // Слайдер в товаре

    $('.product_slider').slick({
        slidesToShow: 1,
        slidesToScroll: 1,
        autoPlay: false,
        autoplaySpeed : 4000,
        dots : false,
        arrows : true,
        nextArrow: '<span class="sl_arrow sl_arrow-left"><i class="fas fa-angle-left"></i></span>',
        prevArrow: '<span class="sl_arrow sl_arrow-right"><i class="fas fa-angle-right"></i></span>',
        centerMode: true,
        centerPadding:'',
        responsive: [
            {
                breakpoint: 991,
                settings: {
                    slidesToShow: 1,
                    slidesToScroll: 1,
                    dots: false,
                    arrows: false
                }
            }
        ]
    });

    // Слайдер на главной

    $('.slider').slick({
        slidesToShow: 1,
        slidesToScroll: 1,
        autoplay: true,
        autoplaySpeed : 3000,
        dots : true,
        arrows : false,
        nextArrow: '<span class="sl_arrow sl_arrow-left"><i class="fas fa-angle-left"></i></span>',
        prevArrow: '<span class="sl_arrow sl_arrow-right"><i class="fas fa-angle-right"></i></span>',
        centerMode: true,
        centerPadding:'',
        responsive: [
            {
                breakpoint: 991,
                settings: {
                    slidesToShow: 1,
                    slidesToScroll: 1,
                    dots: true,
                    arrows: false
                }
            }
        ]
    });

    // Слайдер ранее вы смотрели

    $('.looked_slider').slick({
        slidesToShow: 4,
        slidesToScroll: 4,
        autoplay: false,
        autoplaySpeed : 4000,
        dots : false,
        arrows : true,
        nextArrow: '<span class="sl_arrow sl_arrow-left"><i class="fas fa-angle-left"></i></span>',
        prevArrow: '<span class="sl_arrow sl_arrow-right"><i class="fas fa-angle-right"></i></span>',
        centerMode: false,
        centerPadding:'',
        responsive: [
            {
                breakpoint: 991,
                settings: {
                    slidesToShow: 3,
                    slidesToScroll: 1,
                    dots: false,
                    arrows: true,
                    centerMode: true
                }
            },
            {
				breakpoint: 770,
				settings: {
                    slidesToShow: 3,
                    arrows: false,
					slidesToScroll: 1
				}
			},
			{
				breakpoint: 600,
				settings: {
					slidesToShow: 1,
                    slidesToScroll: 1,
                    arrows: true
				}
            }
        ]
    });

	// Верхнее меню
    $('.top_menu li').has('ul').addClass('down');

    // Боковое меню

    $('.catalog_aside li').has('ul').addClass('down');
    $('.catalog_aside > ul li.down > ul').before('<span class="btn-dropdown"><i class="fas fa-chevron-right"></i></span>');
    $('.catalog_aside .down .btn-dropdown').each(function(){
        if($(this).siblings('ul').is(':visible')){
            $(this).addClass('active');
        }
    });
    $('.catalog_aside .down .btn-dropdown').click(function(){

        $(this).parent().addClass('open');
        if($(this).siblings('ul').is(':visible')){
            $(this).siblings('ul').slideUp();
            $(this).removeClass('active');
        }else{
            $(this).siblings('ul').slideDown();
            $(this).addClass('active');
        }
    });

    // Партнеры

    $('.partner_line-more').click(function(e) {
        e.preventDefault();
        $(this).parents('.partner_line').find('.partner_item-hidden').slideToggle();
        $(this).toggleClass('logos-line__more_hide');
        var link_text = $(this).text();
        $(this).text(
            link_text == "смотреть еще" ? "скрыть" : "смотреть еще");
    });

    // Похожие товары

    $('.btn-similar').click(function(e) {
        e.preventDefault();
        $(this).parents('.similar_section-row').find('.catalog_item-hidden').slideToggle();
        $(this).toggleClass('btn-similar--hide');
        var link_text = $(this).text();
        $(this).text(
            link_text == "смотреть еще" ? "скрыть" : "смотреть еще");
    });

});