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https://issues.apache.org/jira/browse/CB-1250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13436322#comment-13436322
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Braden Shepherdson commented on CB-1250:
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So, good news and bad news.
First, the stock Android contacts app is surprisingly complex, 75k lines. I
can't figure out where it actually loads the contacts' names for the main
browsable list.
Second, removing all JSON* creation and everything else from the loop over the
contacts, and replacing it with just add()ing the displayNames to an
ArrayList<String> only changes the runtime a bit. There's something else going
on.
Much simpler than the real contacts app, one of the sample apps shipped with
the SDK can load a list of my contacts' names quickly, so I'll be examining
that to see why it works fast. It uses SimpleCursorAdapter, which I've never
encountered before. I've been digging through that code trying to figure out
how this tangle of ViewBinders and *Adapters eventually results in a ListView
full of TextViews with the contacts' names. Hopefully once I figure it out we
can duplicate that approach or see what's making our approach slow. We know now
that it's not the contents of the loop, but something more general in this
technique.
> Speed up fetching of contacts on Android
> ----------------------------------------
>
> Key: CB-1250
> URL: https://issues.apache.org/jira/browse/CB-1250
> Project: Apache Cordova
> Issue Type: Improvement
> Components: Android
> Reporter: Braden Shepherdson
> Assignee: Joe Bowser
> Priority: Minor
> Fix For: 2.1.0
>
>
> Fetching all contacts on Android takes a long time when the user has many
> contacts (I have ~1450 and it takes 20-30 seconds). The Contacts app can load
> in less than a second, so what are we doing that's causing it to slow down?
> As an alternative or additional enhancement, add "limit" and "offset"
> functionality to the ContactFindOptions, to retrieve smaller subsets of the
> contacts more quickly.
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