Оптимизация fetch запросов в react-redux?

// Actions
export function fetchAPI(dispatch, type_reducer, url) {
    dispatch (type_reducer());
    fetch('http://127.0.0.1:8000/api/v0/' + url)
            .then(function (response) {
                if(response.status !== 200) {
                    return;
                }
                response.json().then(json => json.length === 0 || undefined || null ? undefined : json.map(item => item)).then(item => dispatch(type_reducer(true, item)))
            })
}




export function selectFilter(request) {
    return (dispatch) => fetchAPI(dispatch, type_reducer=SelectFilter, url='filter' + request);
}

import {FILTER_CATEGORIES_REQUEST, FILTER_CATEGORIES_SUCCESS} from "../constans/Page";


// ActionCreators
export function SelectFilter(state, item) {
    if (state) {
        return {
            type: FILTER_CATEGORIES_REQUEST
        }
    } else {
        return {
            type: FILTER_CATEGORIES_SUCCESS,
            item
        }
    }
}