bluebird

Full featured Promises/A+ implementation with exceptionally good performance

v3.7.2 URL: https://unpkg.com/bluebird@3.7.2/js/browser/bluebird.js

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promise performance promises promises-a promises-aplus async await deferred deferreds future flow control dsl fluent interface

rfdc

Really Fast Deep Clone

v1.4.1 URL: https://unpkg.com/rfdc@1.4.1/index.js

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object obj properties clone copy deep recursive key keys values prop deep-clone deepclone deep-copy deepcopy fast performance performant fastclone fastcopy fast-clone fast-deep-clone fast-copy fast-deep-copy

web-vitals

Easily measure performance metrics in JavaScript

v4.2.4 URL: https://unpkg.com/web-vitals@4.2.4/dist/web-vitals.iife.js

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crux performance metrics Core Web Vitals CLS FCP FID INP LCP TTFB

msgpackr

Ultra-fast MessagePack implementation with extensions for records and structured cloning

v1.11.2 URL: https://unpkg.com/msgpackr@1.11.2/dist/node.cjs

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MessagePack msgpack performance structured clone

reusify

Reuse objects and functions with style

v1.0.4 URL: https://unpkg.com/reusify@1.0.4/reusify.js

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reuse object performance function fast