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From "Paul Joseph Davis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1270) Rewrite the view engine
Date Mon, 12 Sep 2011 15:28:09 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102730#comment-13102730
] 

Paul Joseph Davis commented on COUCHDB-1270:
--------------------------------------------

I'd like to have it in trunk sooner rather than later so that it doesn't start drifting too
much. There are already commits coming in that affect this patch.

That said, I'd say its not a bad idea to have it wait to commit it until after 1.2.x is branched.
Perhaps its time to start a thread on dev@ on any outstanding issues that need to be resolved
before we branch.

> Rewrite the view engine
> -----------------------
>
>                 Key: COUCHDB-1270
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1270
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: JavaScript View Server
>            Reporter: Paul Joseph Davis
>         Attachments: 0001-Minor-changes-for-new-indexing-engine.patch, 0002-Create-the-couch_index-application.patch,
0003-Create-the-couch_mrview-application.patch, 0004-Remove-the-old-view-engine.patch
>
>
> The view engine has been creaky and cluttered. As shown by GeoCouch, adding new indexers
basically involves copying the entire view engine and hacking the parts that are different.
In short, the opposite of good engineering.
> Over the last couple weeks I've refactored the view engine and reimplemented the map/reduce
view engine. These changes are 100% internal and no external behavior has changed. Performance
is just a tiny bit better than trunk. I did do some playing trying to improve view update
times and there are some dances we could do, but for the time being I wanted to keep the same
general architecture for updates so that the changes are minimal.

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