Only fire set if object data has changed in Svelte store

In Svelte, when using a writable store that takes a single primitive value (e.g. a string), when firing set multiple times for the same value, subscribe will only be called when the value changes. Demo in Svelte REPL

However, when storing a complex object, every time set is called, even if the object has the same properties, subscribe will still be fired. Demo in Svelte REPL

I'm running a fairly expensive external API call on updates (handled via subscribe), so I want to limit if the data hasn't changed. How best should I prevent firing set or listening to subscribe if the data is the same as the previous run?

An attempt at a solution would be to keep the previous value inside a closure and compare before calling set and then carefully expose which API methods are available for consumers of the store like this:

import { writable, get } from "svelte/store";const initialContentState = {  title: "",  body: "",};const { subscribe, set } = writable(initialContentState);const isQuestionEqual = (a,b) => {    return a.title === b.title && a.body === b.body;}const initQuestionContentStore = () => {    let prevValue = initialContentState;    return {        subscribe,        reset() {            set(initialContentState)        },        setContent(content) {                if (!isQuestionEqual(content, prevValue)) {                    set(content);                    prevValue = content;            }        }    }}export const questionContentStore = initQuestionContentStore()

Demo in Svelte REPL

However, feels weird to have to keep track of the state within the store which is supposed to be responsible for keeping track of state itself. I could also use get to fetch the value from the store inside of the setContent method, but docs suggest against it for perf reasons

Note: This is similar to Why does my Svelte store subscribe() get fired when the value hasn't changed?, but I want a workaround, not a reason.