[jira] Created: (RVM-821) Move the system to use address-based hashing exclusively

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[jira] Created: (RVM-821) Move the system to use address-based hashing exclusively

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Move the system to use address-based hashing exclusively
--------------------------------------------------------

                 Key: RVM-821
                 URL: http://jira.codehaus.org/browse/RVM-821
             Project: RVM
          Issue Type: Improvement
          Components: Runtime: Object Model
            Reporter: Filip Pizlo
            Assignee: Filip Pizlo


This is a proposal; I won't do it if I hear disapproval.  Moving to a system that uses address-based hashing exclusively would simplify a great many things.  The fact that it's statically enabled in the code and (to my knowledge) not regression tested implies that even if it still works today it may not work after any number of other changes are made to the system.  Additionally, when not using address-based hashing, we get a fairly small hash code which may not be suitable for lots of applications.  Thus, I propose to remove all hash-bits code and move to a system that uses address-based hashing exclusively.

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[jira] Commented: (RVM-821) Move the system to use address-based hashing exclusively

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    [ http://jira.codehaus.org/browse/RVM-821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=176045#action_176045 ]

Filip Pizlo commented on RVM-821:
---------------------------------

Correction to the above:

This is a proposal; I won't do it if I hear disapproval. Moving to a system that uses address-based hashing exclusively would simplify a great many things. The fact that the alternative, using pre-reserved hash bits, is statically disabled and (to my knowledge) not regression tested implies that even if it still works today it may not work after any number of other changes are made to the system. Additionally, when using hash-bits, we get a fairly small hash code which may not be suitable for lots of applications. Thus, I propose to remove all hash-bits code and move to a system that uses address-based hashing exclusively.


> Move the system to use address-based hashing exclusively
> --------------------------------------------------------
>
>                 Key: RVM-821
>                 URL: http://jira.codehaus.org/browse/RVM-821
>             Project: RVM
>          Issue Type: Improvement
>          Components: Runtime: Object Model
>            Reporter: Filip Pizlo
>            Assignee: Filip Pizlo
>
> This is a proposal; I won't do it if I hear disapproval.  Moving to a system that uses address-based hashing exclusively would simplify a great many things.  The fact that it's statically enabled in the code and (to my knowledge) not regression tested implies that even if it still works today it may not work after any number of other changes are made to the system.  Additionally, when not using address-based hashing, we get a fairly small hash code which may not be suitable for lots of applications.  Thus, I propose to remove all hash-bits code and move to a system that uses address-based hashing exclusively.

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[jira] Closed: (RVM-821) Move the system to use address-based hashing exclusively

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     [ http://jira.codehaus.org/browse/RVM-821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Filip Pizlo closed RVM-821.
---------------------------

    Resolution: Not A Bug

gctrace relies on not having address based hashing.  I'll leave this be for now.

> Move the system to use address-based hashing exclusively
> --------------------------------------------------------
>
>                 Key: RVM-821
>                 URL: http://jira.codehaus.org/browse/RVM-821
>             Project: RVM
>          Issue Type: Improvement
>          Components: Runtime: Object Model
>            Reporter: Filip Pizlo
>            Assignee: Filip Pizlo
>
> This is a proposal; I won't do it if I hear disapproval.  Moving to a system that uses address-based hashing exclusively would simplify a great many things.  The fact that it's statically enabled in the code and (to my knowledge) not regression tested implies that even if it still works today it may not work after any number of other changes are made to the system.  Additionally, when not using address-based hashing, we get a fairly small hash code which may not be suitable for lots of applications.  Thus, I propose to remove all hash-bits code and move to a system that uses address-based hashing exclusively.

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