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https://issues.apache.org/jira/browse/CB-638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456117#comment-13456117
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Andrew Grieve commented on CB-638:
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That turned out to be it. I added a flag to disable the optimization and
HANGING_GET got a lot slower.
I tried to get your benchmark to be more accurate by disabling setTimeout and
adding in delays, but it's still not quite giving the same results as the
manual page I created.
I also played with using benchmark.js to measure the times, but it gives
ops/second that are far below what the manual test page shows. I suspect it's
from it's use of setTimeout when using deferred tests, but I found the source
code of benchmark.js to be quite confusing, so gave up on it.
In case you're interested, I pushed it to my github as a separate entry in the
auto-tests page. I'm not planning on committing it though, as I think the
manual test page does a better job at measuring.
https://github.com/agrieve/incubator-cordova-mobile-spec/tree/bench
> Slow native bridge (especially android)
> ---------------------------------------
>
> Key: CB-638
> URL: https://issues.apache.org/jira/browse/CB-638
> Project: Apache Cordova
> Issue Type: Improvement
> Components: Android
> Reporter: Lee Crossley
> Assignee: Andrew Grieve
> Priority: Critical
> Labels: 2.1.0
> Fix For: 2.2.0
>
>
> Doing many native callbacks (such as writing files) has a significant
> overhead.
> Trigger.io's native bridge is more than 5 times faster than Cordova (on
> Android).
> http://trigger.io/cross-platform-application-development-blog/wp-content/uploads/2012/02/chart_1-21.png
> I'd love to see similar performance stats in Cordova.
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