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https://issues.apache.org/jira/browse/STORM-3100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roshan Naik reassigned STORM-3100:
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Assignee: Roshan Naik
> Minor optimization: Replace HashMap<Integer, T> with an array backed data
> structure for faster lookups
> ------------------------------------------------------------------------------------------------------
>
> Key: STORM-3100
> URL: https://issues.apache.org/jira/browse/STORM-3100
> Project: Apache Storm
> Issue Type: Improvement
> Reporter: Roshan Naik
> Assignee: Roshan Naik
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> * Introduce _CustomIndexArray_: An array backed data structure to speedup
> HashMap<Integer, T> use cases *in critical path*. It needs to supported -ve
> indexing and a user defined (on construction) Upper and Lower Index range.
> Does not need to be dynamically resizable given the nature of use cases we
> have.
> * Use this data structure for _GeneralTopologyContext._taskToComponent_
> mapping which is looked up in the critical path _Task.getOutgoingTasks._ This
> lookup happens at least once for every emit and consequently can happen
> millions of times per second.
> * Also use this for _JCQueue.localReceiveQueues_ where the basic idea is
> already in use but not in a reusable manner.
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