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Status Delivered
Workspace IBM Rational Business Developer
Categories EGL Language
Created by Guest
Created on Oct 13, 2009

RELATED IDEAS

Avoid copying arguments [RTC 32246]

Although the semantics of parameter passing in called programs is call-by-reference, the argument is copied in order to enable implicit type conversion. However, KBC applications always calls programs with an argument whose type is identical to the parameter's. Hence no type coercion and therefore no copy is required.
When a new element needs to be added to an array, the natural way of doing so is by using such functions as appendElement() and insertElement(). This turns out to be suboptimal because these functions are call-by-value and hence copy their argument. The rationale for this copy is that a type coercion may be needed from the type of the actual argument to the type of the elements of the target array.
At KBC, these type coercions are usually not needed as the runtime type of the argument is identical to the formal parameter type. In these circumstances we request that the EGL implementation avoids a copy.


We've been investigation this together with IBM already (Paul Hoffman and Matthew Heitz).

Idea priority Medium
  • Guest
    Reply
    |     Sep 14, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Programming Languages
    Product - Business Developer

    For recording keeping, the previous attributes were:
    Brand - Rational
    Product family - Design & development
    Product - Business Developer

  • Guest
    Reply
    |     Apr 14, 2010

    This RFE's Headline was changed after submission to reflect the headline of an internal request we were already considering, but will now track here.

  • Guest
    Reply
    |     Apr 14, 2010

    This feature has been implemented in fix pack 7.5.1.5

  • Guest
    Reply
    |     Oct 22, 2009

    Thank you for this suggestion. This is one of several enhancements we are looking at to improve Java runtime performance when processing structured records. We expect to implement improvements in this area in a 7.5.x fix pack.

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