Why is the progressive lazy load timer set to 1 second

Here, the interval timer is set to 1 second

https://github.com/akiran/react-slick/blob/97442318e9a442bd4a84eb25133ef62087f98232/src/inner-slider.js#L79

Can we make this at least 500ms or even faster. If possible, can we expose this as a prop or provide some way to configure it.