glide loading picture recycleview sliding speed

Glide.with(mContext).load(item.getImgurl())
.dontAnimate().apply(
RequestOptions.centerCropTransform()
.placeholder(R.drawable.default_error)
.error(R.drawable.default_error)
.fallback(R.drawable.default_error))
.diskCacheStrategy(DiskCacheStrategy.RESOURCE)
.thumbnail(0.4f) // 0.5略缩图
.into(imageView);

    try {
        Field field = mRecyclerview.getClass().getDeclaredField("mMaxFlingVelocity");
        field.setAccessible(true);
        field.set(mRecyclerview,5200); //滑动速度 ，设置越不，滑动越慢
    } catch (Exception e) {
        e.printStackTrace();

    }