In terms of performance, it outperforms all the animation libraries I’ve tried ( you can compare the stress test linked at the bottom of the page with this version made with GreenSock: http://animateplus.com/examples/stress-test/gsap/ ). In terms of weight and parse time, it’s also the fastest afaict. That being said, it’s not as powerful as GreenSock for example as it mainly focuses on performance and simplicity.