Как исправить задержку прокрутки страницы в Chrome

class ScrollControl {
  constructor() {
    this.sectionDOMList = document.querySelectorAll('section');
    this.initListeners();
  }

  initListeners() {
    window.addEventListener('scroll', (e) => {
      this.animateSections();
    });
  }

  animateSections() {
    for (let i = 0; i < this.sectionDOMList.length; i++) {
      if (this.isInViewport(this.sectionDOMList[i])) {
      	if(!this.sectionDOMList[i].isReveal){
          this.sectionDOMList[i].isReveal = true;
          this.sectionDOMList[i].classList.add('reveal');
        }
      }
    }
  }

  isInViewport(element) {
    const elementCenter = (element.getBoundingClientRect().top + element.getBoundingClientRect().bottom)/2;
    const viewportTop = window.scrollY;
    const viewportBottom = viewportTop + window.innerHeight;
    return elementCenter < viewportBottom;
  }
}

(function() {
  new ScrollControl();
})();

/* Reset */

html {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

*,
*:before,
*:after {
  -webkit-box-sizing: inherit;
  box-sizing: inherit;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul {
  margin: 0;
  padding: 0;
  font-weight: normal;
}

ol,
ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Base */

body {
  width: 100%;
  height: 100%;
  background: white;
  color: #3b3b3b;
  font-family: 'Larsseit', Helvetica, Arial, sans-serif;
}

.container {
  max-width: 1640px;
  margin-left: 30px;
  margin-right: 30px;
}

@media (min-width: 768px) {
  .container {
    margin-left: 80px;
    margin-right: 80px;
  }
}

@media (min-width: 1800px) {
  .container {
    margin: 0 auto;
  }
}

.vc {
  display: table;
  height: 100%;
}

.vc-ele {
  display: table-cell;
  vertical-align: middle;
}

section {
  padding: 400px 0;
}

section.full-vh {
  position: relative;
  width: 100%;
  height: 100vh;
  padding: 0;
}

.row {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.col-half {
  width: 100%;
}

@media (min-width: 992px) {
  .col-half {
    width: 50%;
  }
}

.row.align-center {
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

/* Typography */

h1 {
  font-size: 52px;
}

h2 {
  font-size: 26px;
}

p {
  font-family: 'Larsseit', Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: 300;
  line-height: 1.5;
  color: #3b3b3b;
}

/* Image reveal */

.image-reveal {
  position: relative;
  overflow: hidden;
}

.image-reveal-cover {
  background: #fcfcfc;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 5;
  transform: translateX(0);
  -webkit-transform: translateX(0);
  transition: transform cubic-bezier(.19, 1, .22, 1) 1.75s;
  -webkit-transition: transform cubic-bezier(.19, 1, .22, 1) 1.75s;
}

.image-reveal img {
  position: relative;
  z-index: 2;
  opacity: 0;
  transform: scale(1.4);
  -webkit-transform: scale(1.4);
  transition: all cubic-bezier(.19, 1, .22, 1) 1.5s;
  -webkit-transition: all cubic-bezier(.19, 1, .22, 1) 1.5s;
}

section.reveal .image-reveal-cover {
  transform: translateX(100%);
  -webkit-transform: translateX(100%);
}

section.reveal .image-reveal img {
  opacity: 1;
  transform: scale(1);
  -webkit-transform: scale(1);
}

<div id="page">
  <div class="container">

    <section class="full-vh">
      <div class="vc">
        <div class="vc-ele">
          <h1>Scroll down</h1>
        </div>
      </div>
    </section>

    <section>
      <div class="row align-center">

        <div class="col-half">
          <div class="image-reveal">
            <div class="image-reveal-cover"></div>
            <img src="https://fearthewild.com/clients/playground/horse.jpg" alt="Horse" />
          </div>
        </div>

        <div class="col-half">
          <h2>This is my horse.</h2>
          <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem
            quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt.</p>
          <p>Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem
            ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</p>
        </div>

      </div>
    </section>

  </div>
</div>