Optimize Scroll Speed For Internet Explorer 11

I currently have an agenda-like application where the first column is absolute horizontal and the first row absolute vertical. I am achieving this by catching the scroll effect and

Solution 1:

You could try to throttle the functionality of the scroll function every 100ms or 200ms which is still pretty fast each second.

var planningCol = $('.Planning tr > td:first-child'),
    planningHead = $('.Planning thead > tr:first-child');

$(window).scroll(function(){
    var self = this;

    throttle(function(){
        planningCol.css({ left: $(self).scrollLeft() });
        planningHead.css('top', $(self).scrollTop() + 50 + 'px');
    }(), 200); // call your function directly upon return
});

Or you can use CSS on the body, detecting when a page is scrolled or scrolling. Then apply .scrolling { pointer-events: none !important; } which boosts the UI.

Also try to move the selections out of the scroll function if they are always the same.

var win = $(window),
    body = $(document.body),
    planning = $('.Planning'),
    planningCol = planning.find('tr > td').first(),
    planningHead = planning.find('thead > tr').first();

win.scroll(function(){
    // scrolled
    body.toggleClass('scrolled', !!win.scrollTop());

    // scrolling
    body.addClass('scrolling');
    planningCol.css({ left: win.scrollLeft() });
    planningHead.css({ top: win.scrollTop() });

    setTimeout(function(){
        body.removeClass('scrolling');
    }, 200);
});