*Contact emails* [email protected] *Specification* *N/A*
*Design docs* https://docs.google.com/document/d/1xaoF9iSOojrlPrHZaKIJMK4iRZKA3AD6pQvbSy4ueUQ/edit?usp=sharing *Summary* For a small number (hundreds) of hand-curated static third-party script, stylesheet and compression-dictionary resources that are used on a large portion of the web, Chrome will use a single-keyed HTTP cache to store those resources. This helps users and site owners with faster performance for those resources that are very widely used while maintaining the privacy protections of the partitioned disk cache. This feature targets the resources that most users are likely to see multiple times across multiple sites in any given browsing session. They are usually not in the critical path of the page loading and may not impact the common performance metrics but they are still important for the healthy operation of the web. The list of candidate resources is manually curated from the HTTP Archive dataset and updated on an ongoing basis. This includes site-independent things like common analytics scripts, social media embeds, video player embeds, captcha providers and ads libraries. It allows for code that uses versioned URLs as long as the versioning is not a manual process by embedders and that the same version is sent to everybody at a given point in time with the same contents. This does not include things like common Javascript libraries where they are commonly self-hosted or where the URL references a specific version of the library and it is up to site owners to manually select a version. i.e. Yes: https://maps.googleapis.com/maps-api-v3/api/js/62/5d/common.js No: https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js *Blink component* Blink>Network <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ENetwork%22> *Web Feature ID* *No information provided* *Risks* *Interoperability and Compatibility* This change is internal to Chrome and should be completely transparent to the web platform with no interoperability risks. *Gecko*: N/A *WebKit*: N/A *Web developers*: No signals *Other signals*: *Ergonomics* N/A *Activation* N/A *Security* Cache partitioning added a level of privacy protection that is being disabled for a small number of resources where it is deemed safe to do so. The linked document and issue provide the details on the protections that are in place to minimize the privacy exposure. *WebView application risks* Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? *No* *Debuggability* N/A *Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?* Yes *Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* N/A *Tracking bug* https://issues.chromium.org/u/1/issues/404196743 *Measurement* The success of this feature will be measured directly with the owners of a small number of targeted scripts with a web-exposed experiment. *Estimated milestones* Shipping on desktop 144 DevTrial on desktop 138 Shipping on Android 144 DevTrial on Android 138 Shipping on WebView 144 *Link to entry on the Chrome Platform Status* https://chromestatus.com/feature/5202380930678784 This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPq58w6%2BOj%2BOOHa1PHp-9auhEBJRGyyLZGWYaJeC3w-E9Y07-g%40mail.gmail.com.
