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From "Filipe Manana (JIRA)" <j...@apache.org>
Subject [jira] Updated: (COUCHDB-980) Micro optimization to couch_file
Date Fri, 10 Dec 2010 11:06:02 GMT

     [ https://issues.apache.org/jira/browse/COUCHDB-980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Filipe Manana updated COUCHDB-980:
----------------------------------

    Fix Version/s: 1.2
                   1.1
                   1.0.2

Backported to 1.1.x and 1.0.x as well.

> Micro optimization to couch_file
> --------------------------------
>
>                 Key: COUCHDB-980
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-980
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>             Fix For: 1.0.2, 1.1, 1.2
>
>
> The following short patch moves the MD5 verification outside the couch_file server:
> https://github.com/fdmanana/couchdb/commit/51c463d682c478dcb273bd88f1ef3046a709689f
> Despite being apparently so insignificant (couch_util:md5/1 takes about 700us in my machine),
I get this significant results with relaximation:
> $ node tests/compare_write_and_read.js --wclients 100 --rclients 200 \
>   -name1 md5_out -name2 trunk \
>   -url1 http://localhost:5984/ -url2 http://localhost:5985/ \
>   --duration 120
> run 1)  http://graphs.mikeal.couchone.com/#/graph/5c859b3e7d1b9bd0488cfe271105130c
> run 2)  http://graphs.mikeal.couchone.com/#/graph/5c859b3e7d1b9bd0488cfe2711051bba
> The documents used in the test have a size of about 1Kb.
> If nobody has an objection, I'll commit this to trunk.

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