Web-Facing Change PSA: IndexedDB: SQLite backend (in-memory contexts)

[Chromestatus]

Contact emails

evan...@microsoft.com, Abhishek.S...@microsoft.com

Specification

https://www.w3.org/TR/IndexedDB

Summary

Chromium's IndexedDB implementation is rewritten on top of SQLite, to replace the previous implementation that uses a hybrid of LevelDB and flat files. There is no change to the Web API. This is expected to improve reliability and, to a lesser extent, performance. For now this is applied only to in-memory contexts such as Incognito mode in Chromium and Google Chrome. This limits the impact of any new bugs, as well as puts off the need to worry about migration of existing data persisted to disk.

Blink component

Blink>Storage>IndexedDB

Web Feature ID

indexeddb

Search tags

sqlite, idb, indexeddb, leveldb

Risks

Interoperability and Compatibility

Interop: this work entails a web-visible behavioral change concerning an edge case in IDB transaction scheduling. This change brings Chromium in line with Firefox and Safari. (Both new and old behavior are standards-compliant.) See demo. Compatibility: This PSA exists primarily to warn of the risk of unintended breakage. The later step where persisted databases are stored with SQLite, and existing data is migrated to SQLite, will have higher associated risks and will have its own PSA.

Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals:

Security

All data on disk is still segregated by storage bucket (origin). Both new and old implementation are newly fuzz-tested.

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 information provided

Debuggability

existing IndexedDB DevTools support is unimpacted

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?

Yes
https://wpt.fyi/results/IndexedDB

Tracking bug

https://issues.chromium.org/issues/436880911

Estimated milestones

Shipping on desktop	144
DevTrial on desktop	144
Shipping on Android	144

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5126896685809664

This intent message was generated by Chrome Platform Status.