696822 - IndexedDB: add experimental support for IDBObjectStore.openKeyCursor/getAllKeys

Status: RESOLVED FIXED

(Core :: Storage: IndexedDB, defect)

Description

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

In a situation when a objectStore contains large value objects, we can significantly reduce IO by letting the page only read in the actual key data as it's iterating over a set of entries.

This is especially valuable when we support arrays-as-keys as the key can contain more valuable information.

In fact, people could even add additional values to the arrays just to enable faster access by just getting key data. This is a common way to improve performance in SQL, where adding columns to the primary key can significantly speed up reads which just use those columns.

Comment 1

[Ben Turner (not reading bugmail, use the needinfo flag!)]

This was fixed a long time ago.