Recyclerview lag on scroll due to Admob ads

I want to load ads in RecyclerView ads are loaded successfully but it is casuing so much lag while scrolling

Following is code I have written in OnBindViewHolder method of Adapter

How to fix this lag?

((DealHolder) holder).adcardView.post(new Runnable() {
                @Override
                public void run() {
                    final NativeExpressAdView adView = new NativeExpressAdView(((DealHolder) holder).itemView.getContext());
                    final int adWidth = ((DealHolder) holder).adcardView.getWidth() - ((DealHolder) holder).adcardView.getPaddingLeft()
                            - ((DealHolder) holder).adcardView.getPaddingRight();
                    final int adHeight = ((DealHolder) holder).adcardView.getHeight() - ((DealHolder) holder).adcardView.getPaddingBottom()
                            - ((DealHolder) holder).adcardView.getPaddingTop();
                    final float scale = ((DealHolder) holder).adcardView.getResources().getDisplayMetrics().density;
                    AdSize adSize = new AdSize((int) (adWidth / scale), (int) (adHeight / scale));
                    adView.setAdSize(adSize);
                    adView.setAdUnitId(((DealHolder) holder).adcardView.getContext().getString(R.string.test_adunit_id));
                    AdRequest request = new AdRequest.Builder().addTestDevice("jjhjhbjhjhjhjhjhjhjh").build();
                    adView.loadAd(request);
                    adView.setAdListener(new AdListener() {
                        @Override
                        public void onAdLoaded() {
                            super.onAdLoaded();
                        }

                        @Override
                        public void onAdFailedToLoad(int i) {
                            super.onAdFailedToLoad(i);
                        }
                    });
                    ((DealHolder) holder).adcardView.removeAllViews();
                    ((DealHolder) holder).adcardView.addView(adView);
                }
            });