Exposes an optional relaxedDurability parameter on IDBDatabase.transaction to control flushing to disk.
Motivation
Allow developers to explicitly trade off durability for performance. Currently after writing an IndexedDB transaction, Firefox does not flush to disk but Chrome does. This flush increases the durability (in the ACID sense) in that it will be guaranteed to have been written all the way to disk rather than merely to an intermediate OS cache. However, this comes with a significant performance cost. On one test benchmark, not flushing caused a 10X+ performance improvement in adding new objects to a database: https://chromium-review.googlesource.com/c/chromium/src/+/1775557 There is a future hope that we could make the relaxedDurability=true the default instead of opt-in.
Specification
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 83
- Chrome for Android release 83
- Android WebView release 83
Consensus & Standardization
Owner
Intent to Prototype url
Intent to Prototype threadSearch tags
indexeddb, durability,Last updated on 2020-11-09
Comments
Simple example: const txn = database.transaction([ "storeName" ], "readwrite", { durability: "relaxed" }); txn.durability; // "relaxed"