Faster Navigation at YouTube with SPF

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Over 6 billion hours of video are watched each month on Youtube
That’s almost one hour for every person on Earth
Youtube wants to get that video to you as fast as possible

Identification of problem

Youtube developers analysis data from real user monitoring and broke down the Critical Stages of Playback
Initializing player stage is same for every playback
So, they decide to reuse the same player when switching from video to video


Solution

Youtube introducing a new JavaScript framework for page navigation

SPF is a lightweight framework for navigation and page updates
When someone visits YouTube for first time the pages is statically loaded with whole content including video player. If he/she visit another video the video player will be kept persist and only the other parts of the pages will be loaded by receiving these page fragments from server increases performance compared to loading the whole page again and again.

Result of SPF YouTube videos are playing 40% faster than last year.

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