resourcetiming-compression.js | ResourceTiming compression and decompression

resourcetiming-compression.js is a JavaScript library. resourcetiming-compression.js has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i resourcetiming-compression' or download it from GitHub, npm.

resourcetiming-compression.js compresses data from ResourceTiming. A companion script, resourcetiming-decompression.js, converts the compressed data back to the original form. ResourceTiming is a W3C web-perf API that exposes all of the page's resources' network timing information to the developer and is available in most modern browsers. The interface performance.getEntriesByType('resource') returns a list of resources with information about each resource's URL, why it was downloaded, and a dozen timestamps. Collecting this information is easy, but beaconing all of this data back to a data warehouse can be a challenge because of the amount of data available for each resource. On a typical page, which might have over 100 resources, you could easily see 50 KB of ResourceTiming data per page-load. resourcetiming-compression.js applies several data-compression techniques to reduce the size of your serialized ResourceTiming data to about 15% of it's original size in many cases. See this nicj.net blog post for a description of these techniques. resourcetiming-decompression.js is a companion script that will take the compressed ResourceTiming data and builds it back to its original ResourceTiming form (eg. performance.getEntriesByType('resource')) for analysis. NOTE: resourcetiming-compression.js is the same code that drives the restiming.js plugin for Boomerang, but also includes the resourcetiming-decompression.js component.