Run results for: fast-sort js vs ts

Test name	Executions per second
✓ JS fast-sort	82 Ops/sec
TS fast-sort	73 Ops/sec
Script Preparation code:
const fastSortTS = () => {
    // >>> INTERFACES <<<
    // >>> HELPERS <<<
    const castComparer = (comparer) => (a, b, order) => comparer(a, b, order) * order;
    const throwInvalidConfigErrorIfTrue = function(condition, context) {
        if (condition)
            throw Error(`Invalid sort config: ${context}`);
    };
    const unpackObjectSorter = function(sortByObj) {
        const {
            asc,
            desc
        } = sortByObj || {};
        const order = asc ? 1 : -1;
        const sortBy = (asc || desc);
        // Validate object config
        throwInvalidConfigErrorIfTrue(!sortBy, 'Expected `asc` or `desc` property');
        throwInvalidConfigErrorIfTrue(asc && desc, 'Ambiguous object with `asc` and `desc` config properties');
        const comparer = sortByObj.comparer && castComparer(sortByObj.comparer);
        return {
            order,
            sortBy,
            comparer
        };
    };
    // >>> SORTERS <<<
    const multiPropertySorterProvider = function(defaultComparer) {
        return function multiPropertySorter(sortBy, sortByArr, depth, order, comparer, a, b) {
            let valA;
            let valB;
            if (typeof sortBy === 'string') {
                valA = a[sortBy];
                valB = b[sortBy];
            } else if (typeof sortBy === 'function') {
                valA = sortBy(a);
                valB = sortBy(b);
            } else {
                const objectSorterConfig = unpackObjectSorter(sortBy);
                return multiPropertySorter(objectSorterConfig.sortBy, sortByArr, depth, objectSorterConfig.order, objectSorterConfig.comparer || defaultComparer, a, b);
            }
            const equality = comparer(valA, valB, order);
            if ((equality === 0 || (valA == null && valB == null)) &&
                sortByArr.length > depth) {
                return multiPropertySorter(sortByArr[depth], sortByArr, depth + 1, order, comparer, a, b);
            }
            return equality;
        };
    };

    function getSortStrategy(sortBy, comparer, order) {
        // Flat array sorter
        if (sortBy === undefined || sortBy === true) {
            return (a, b) => comparer(a, b, order);
        }
        // Sort list of objects by single object key
        if (typeof sortBy === 'string') {
            throwInvalidConfigErrorIfTrue(sortBy.includes('.'), 'String syntax not allowed for nested properties.');
            return (a, b) => comparer(a[sortBy], b[sortBy], order);
        }
        // Sort list of objects by single function sorter
        if (typeof sortBy === 'function') {
            return (a, b) => comparer(sortBy(a), sortBy(b), order);
        }
        // Sort by multiple properties
        if (Array.isArray(sortBy)) {
            const multiPropSorter = multiPropertySorterProvider(comparer);
            return (a, b) => multiPropSorter(sortBy[0], sortBy, 1, order, comparer, a, b);
        }
        // Unpack object config to get actual sorter strategy
        const objectSorterConfig = unpackObjectSorter(sortBy);
        return getSortStrategy(objectSorterConfig.sortBy, objectSorterConfig.comparer || comparer, objectSorterConfig.order);
    }
    const sortArray = function(order, ctx, sortBy, comparer) {
        if (!Array.isArray(ctx)) {
            return ctx;
        }
        // Unwrap sortBy if array with only 1 value to get faster sort strategy
        if (Array.isArray(sortBy) && sortBy.length < 2) {
            [sortBy] = sortBy;
        }
        return ctx.sort(getSortStrategy(sortBy, comparer, order));
    };

    function createNewSortInstance(opts) {
        const comparer = castComparer(opts.comparer);
        return function(arrayToSort) {
            const ctx = Array.isArray(arrayToSort) && !opts.inPlaceSorting ?
                arrayToSort.slice() :
                arrayToSort;
            return {
                asc(sortBy) {
                    return sortArray(1, ctx, sortBy, comparer);
                },
                desc(sortBy) {
                    return sortArray(-1, ctx, sortBy, comparer);
                },
                by(sortBy) {
                    return sortArray(1, ctx, sortBy, comparer);
                },
            };
        };
    }
    const defaultComparer = (a, b, order) => {
        if (a == null)
            return order;
        if (b == null)
            return -order;
        if (typeof a !== typeof b) {
            return typeof a < typeof b ? -1 : 1;
        }
        if (a < b)
            return -1;
        if (a > b)
            return 1;
        return 0;
    };
    return createNewSortInstance({
        comparer: defaultComparer,
    });

}




const {
    isArray
} = Array

const castComparer = (comparer) => (a, b, order) => comparer(a, b, order) * order

const throwInvalidConfigErrorIfTrue = (condition, context) => {
    if (condition) throw Error(`Invalid sort config: ${context}`)
}

const unpackObjectSorter = (sortByObj) => {
    const {
        asc,
        desc
    } = sortByObj || {}

    const sortBy = (asc || desc)
    // Validate object config
    throwInvalidConfigErrorIfTrue(!sortBy, 'Expected `asc` or `desc` property')
    throwInvalidConfigErrorIfTrue(asc && desc, 'Ambiguous object with `asc` and `desc` config properties')

    return {
        order: asc ? 1 : -1,
        sortBy,
        comparer: sortByObj.comparer && castComparer(sortByObj.comparer)
    }
}

// >>> SORTERS <<<
const multiPropertySorterProvider = (defaultComparer) => {
    const multiPropertySorter = (sortBy, sortByArr, depth, order, comparer, a, b) => {
        const type = typeof sortBy
        let valA;
        let valB;
        if (type === 'string') {
            valA = a[sortBy];
            valB = b[sortBy];
        } else if (type === 'function') {
            valA = sortBy(a);
            valB = sortBy(b);
        } else {
            const objectSorterConfig = unpackObjectSorter(sortBy);
            return multiPropertySorter(objectSorterConfig.sortBy, sortByArr, depth, objectSorterConfig.order, objectSorterConfig.comparer || defaultComparer, a, b);
        }
        const equality = comparer(valA, valB, order);
        if ((equality === 0 || (valA == null && valB == null)) &&
            sortByArr.length > depth) {
            return multiPropertySorter(sortByArr[depth], sortByArr, depth + 1, order, comparer, a, b);
        }
        return equality
    }
    return multiPropertySorter
}

const getSortStrategy = (sortBy, comparer, order) => {
    const type = typeof sortBy
    // Flat array sorter
    if (sortBy === undefined || sortBy === true) return (a, b) => comparer(a, b, order);

    // Sort list of objects by single object key
    if (type === 'string') {
        throwInvalidConfigErrorIfTrue(sortBy.includes('.'), 'String syntax not allowed for nested properties.')
        return (a, b) => comparer(a[sortBy], b[sortBy], order)
    }
    // Sort list of objects by single function sorter
    if (type === 'function') return (a, b) => comparer(sortBy(a), sortBy(b), order)

    // Sort by multiple properties
    if (isArray(sortBy)) {
        const multiPropSorter = multiPropertySorterProvider(comparer)
        return (a, b) => multiPropSorter(sortBy[0], sortBy, 1, order, comparer, a, b);
    }
    // Unpack object config to get actual sorter strategy
    const objectSorterConfig = unpackObjectSorter(sortBy)
    return getSortStrategy(objectSorterConfig.sortBy, objectSorterConfig.comparer || comparer, objectSorterConfig.order)
}

const sortArray = (order, ctx, sortBy, comparer) => {
    if (!isArray(ctx)) return ctx
    if (isArray(sortBy) && sortBy.length < 2)[sortBy] = sortBy

    return ctx.sort(getSortStrategy(sortBy, comparer, order))
}

const createNewSortInstance = (opts) => {
    const comparer = castComparer(opts.comparer)
    return (arrayToSort) => {
        const ctx = isArray(arrayToSort) && !opts.inPlaceSorting ? arrayToSort.slice() : arrayToSort;
        return {
            asc: (sortBy) => sortArray(1, ctx, sortBy, comparer),
            desc: (sortBy) => sortArray(-1, ctx, sortBy, comparer),
            by: sortBy => sortArray(1, ctx, sortBy, comparer),
        }
    }
}

const defaultComparer = (a, b, order) => {
    if (a == null) return order
    if (b == null) return -order
    if (typeof a !== typeof b) return typeof a < typeof b ? -1 : 1

    if (a < b) return -1
    if (a > b) return 1
    return 0
}

var sort = createNewSortInstance({
    comparer: defaultComparer,
})
var sortTS = fastSortTS()


function runTests(sort) {
    sort([1, 4, 2]).asc()
    sort([1, 4, 2]).by({
        asc: true
    })
    sort([1, 4, 2]).desc()
    sort([1, 4, 2]).by({
        desc: true
    })
}
Run results for: fast-sort js vs ts

TS compiled fast-sort vs js modified

JS fast-sort

TS fast-sort
